Physics:List of nuclides

Short description: None

This list of nuclides shows observed nuclides that either are stable or, if radioactive, have half-lives longer than one hour. This represents isotopes of the first 105 elements, except for elements 87 (francium), 102 (nobelium) and 104 (rutherfordium). At least 3,300 nuclides have been experimentally characterized (see List of radioactive nuclides by half-life for the nuclides with decay half-lives less than one hour).

A nuclide is defined conventionally as an experimentally examined bound collection of protons and neutrons that either is stable or has an observed decay mode.

Introduction

There are 251 known so-called stable nuclides. Many of these in theory could decay through spontaneous fission, alpha decay, double beta decay, etc. with a very long half-life, but no radioactive decay has yet been observed. Thus, the number of stable nuclides is subject to change if some of these 251 are determined to be very long-lived radioactive nuclides in the future. In this article, the "stable" nuclides are divided into three tables, one for nuclides that are theoretically stable (meaning no decay mode is possible) and nuclides that can theoretically undergo spontaneous fission but have not been evaluated to check for evidence of this happening, one for nuclides that can theoretically undergo forms of decay other than spontaneous fission but have not been evaluated, and finally a table of nuclides that can theoretically decay and have been evaluated but without detecting any decay. In this latter table, where a decay has been predicted theoretically but never observed experimentally (either directly or through finding an excess of the daughter), the theoretical decay mode is given in parentheses and have "> number" in the half-life column to show the lower limit for the half-life based on experimental observation. Such nuclides are considered to be "stable" until a decay has been observed in some fashion. For example, tellurium-123 was reported to be radioactive, but the same experimental group later retracted this report, and it presently remains observationally stable.

The next group is the primordial radioactive nuclides. These have been measured to be radioactive, or decay products have been identified (tellurium-128, barium-130). There are (currently) 35 of these (see these nuclides), of which 25 have half-lives longer than 10¹³ years. With most of these 25, decay is difficult to observe and for most purposes they can be regarded as effectively stable. Bismuth-209 is notable as it is the only naturally occurring isotope of an element which was long considered stable. A further 10 nuclides, platinum-190, samarium-147, lanthanum-138, rubidium-87, rhenium-187, lutetium-176, thorium-232, uranium-238, potassium-40, and uranium-235 have half-lives between 7.0×10⁸ and 4.83×10¹¹ years, which means they have experienced at least 0.5% depletion since the formation of the Solar System about 4.6×10⁹ years ago, but still exist on Earth in significant quantities. They are the primary source of radiogenic heating and radioactive decay products. Together, there are a total of 286 primordial nuclides.

The list then covers the ~700 radionuclides with half-lives longer than 1 hour, split into two tables, half-lives greater than one day and less than one day.

Over 60 nuclides that have half-lives too short to be primordial can be detected in nature as a result of later production by natural processes, mostly in trace amounts. These include ~44 radionuclides occurring in the decay chains of primordial uranium and thorium (radiogenic nuclides), such as radon-222. Others are the products of interactions with energetic cosmic-rays (e.g. cosmic ray spallation) (cosmogenic nuclides), such as carbon-14. This gives a total of about 350 naturally occurring nuclides. Other nuclides may be occasionally produced naturally by rare cosmogenic interactions or as a result of other natural nuclear reactions (nucleogenic nuclides), but are difficult to detect.

Further shorter-lived nuclides have been detected in the spectra of stars, such as isotopes of technetium, promethium, and some actinides. The remaining nuclides are known solely from artificial nuclear transmutation. Some, such as caesium-137, are found in the environment but as a result of contamination from releases of man-made nuclear fission product (from nuclear weapons, nuclear reactors, and other processes). Other are produced artificially for industrial or medical purposes.

List legend

Each group of radionuclides, starting with the longest-lived primordial radionuclides, is sorted by decreasing half-life, but the tables are sortable by other columns.

no (number) column

A running positive integer for reference. This number, i.e. position in this table, might be changed in the future, especially for nuclides with short half-lives.

nuclide column

Nuclide identifiers are given by their atomic mass number A and the symbol for the corresponding chemical element (corresponding to the unique proton number). In the cases that this is not the ground state, this is indicated by a m for metastable appended to the mass number. Sorting here sorts by mass number.

Z, N column

The number of protons (Z column) and number of neutrons (N column).

energy column

The column labeled "energy" denotes the energy equivalent of the mass of a neutron minus the mass per nucleon of this nuclide (so all nuclides get a positive value) in MeV, formally: m_n − m_nuclide / A, where A = Z + N is the mass number. Note that this means that a higher "energy" value actually means that the nuclide has a lower energy. The mass of the nuclide (in daltons) is A (m_n − E / k) where E is the energy, m_n is 1.008664916 Da and k = 931.49410242 the conversion factor between MeV and daltons.

half-life column

The main column shows times in seconds (31,556,926 seconds = 1 tropical year); a second column showing half-life in more usual units (year, day) is also provided.

Entries starting with a ">" indicates that no decay has ever been observed, with null experiments establishing lower limits for the half-life. Such elements are considered stable unless a decay can be observed (establishing an actual estimate for the half-life). Note half-lives may be imprecise estimates and can be subject to significant revision.

decay mode column

α	α decay
β−	β− decay
β−β−	double β− decay
ε	electron capture
β+	β+ decay
β+β+	double β+ decay
SF	spontaneous fission
IT	isomeric transition

Decay modes in parentheses are still not observed through experiment but are, by their energy, predicted to occur. Numbers in brackets indicate probability of that decay mode occurring in %, tr indicate <0.1%. Spontaneous fission is not shown as a theoretical decay mode for stable nuclides where other modes are possible (see these nuclides).

decay energy column

Multiple values for (maximal) decay energy are mapped to decay modes in their order. The decay energy listed is for the specific nuclide only, not for the whole decay chain. It includes the energy lost to neutrinos.

notes column

CG

Cosmogenic nuclide;

DP

Naturally occurring decay product (of thorium-232, uranium-238, and uranium-235);

ESS

Present in the early Solar System (first few million years), but extinct now as a primordial nuclide.

FP

Nuclear fission product (only those from uranium-235 or plutonium-239) (only those with a half-life over one day are shown);

IM

Industry or medically used radionuclide.

Full list

Theoretically stable nuclides

Main article: Physics:Stable nuclide

These are the theoretically stable nuclides, ordered by "energy".

No.	Nuclide	A	Z	N	Energy (MeV)
1	56Fe	56	26	30	9.153567
2	62Ni	62	28	34	9.147877
3	60Ni	60	28	32	9.145862
4	58Fe	58	26	32	9.142938
5	52Cr	52	24	28	9.137037
6	57Fe	57	26	31	9.127119
7	59Co	59	27	32	9.126046
8	54Cr	54	24	30	9.125633
9	61Ni	61	28	33	9.124129
10	55Mn	55	25	30	9.120611
11	64Ni	64	28	36	9.119754
12	66Zn	66	30	36	9.115258
13	53Cr	53	24	29	9.114435
14	63Cu	63	29	34	9.112272
15	65Cu	65	29	36	9.106154
16	68Zn	68	30	38	9.100845
17	50Ti	50	22	28	9.099861
18	51V	51	23	28	9.094884
19	67Zn	67	30	37	9.084468
20	48Ti	48	22	26	9.081488
21	72Ge	72	32	40	9.079465
22	70Ge	70	32	38	9.079372
23	69Ga	69	31	38	9.076078
24	88Sr	88	38	50	9.070438
25	74Ge	74	32	42	9.063522
26	49Ti	49	22	27	9.062323
27	76Se	76	34	42	9.061485
28	71Ga	71	31	40	9.059218
29	78Se	78	34	44	9.058842
30	90Zr	90	40	50	9.057631
31	89Y	89	39	50	9.056743
32	86Sr	86	38	48	9.054160
33	82Kr	82	36	46	9.054126
34	84Kr	84	36	48	9.052649
35	73Ge	73	32	41	9.048006
36	87Sr	87	38	49	9.046964
37	75As	75	33	42	9.045093
38	80Kr	80	36	44	9.044984
39	77Se	77	34	43	9.040153
40	85Rb	85	37	48	9.037998
41	91Zr	91	40	51	9.037156
42	83Kr	83	36	47	9.034966
43	79Br	79	35	44	9.034220
44	81Br	81	35	46	9.033979
45	92Zr	92	40	52	9.032783
46	46Ti	46	22	24	9.030532
47	47Ti	47	22	25	9.027336
48	44Ca	44	20	24	9.013793
49	94Mo	94	42	52	9.011856
50	93Nb	93	41	52	9.009051
51	96Mo	96	42	54	8.996229
52	95Mo	95	42	53	8.994564
53	42Ca	42	20	22	8.989116
54	38Ar	38	18	20	8.984870
55	45Sc	45	21	24	8.983945
56	97Mo	97	42	55	8.973806
57	98Ru	98	44	54	8.971572
58	43Ca	43	20	23	8.964551
59	100Ru	100	44	56	8.963517
60	99Ru	99	44	55	8.956348
61	34S	34	16	18	8.951675
62	40Ar	40	18	22	8.947325
63	102Ru	102	44	58	8.944837
64	101Ru	101	44	57	8.942117
65	41K	41	19	22	8.938623
66	39K	39	19	20	8.938174
67	104Pd	104	46	58	8.930847
68	37Cl	37	17	20	8.929760
69	103Rh	103	45	58	8.925910
70	36S	36	16	20	8.923108
71	106Pd	106	46	60	8.919460
72	105Pd	105	46	59	8.913356
73	35Cl	35	17	18	8.900285
74	108Pd	108	46	62	8.900253
75	107Ag	107	47	60	8.897514
76	110Cd	110	48	62	8.892718
77	30Si	30	14	16	8.885761
78	109Ag	109	47	62	8.885300
79	32S	32	16	16	8.884318
80	33S	33	16	17	8.876964
81	31P	31	15	16	8.859744
82	28Si	28	14	14	8.838935
83	29Si	29	14	15	8.826327
84	112Cd	112	48	64	8.880077
85	111Cd	111	48	63	8.875445
86	114Sn	114	50	64	8.865722
87	113In	113	49	64	8.862212
88	116Sn	116	50	66	8.860362
89	115Sn	115	50	65	8.854249
90	118Sn	118	50	68	8.848073
91	117Sn	117	50	67	8.843977
92	120Sn	120	50	70	8.830537
93	119Sn	119	50	69	8.828201
94	121Sb	121	51	70	8.811783
95	122Te	122	52	70	8.811606
96	124Te	124	52	72	8.801364
97	123Sb	123	51	72	8.796727
98	126Te	126	52	74	8.786126
99	125Te	125	52	73	8.783505
100	128Xe	128	54	74	8.773359
101	127I	127	53	74	8.771981
102	130Xe	130	54	76	8.762725
103	129Xe	129	54	75	8.758904
104	132Xe	132	54	78	8.747695
105	131Xe	131	54	77	8.746253
106	134Ba	134	56	78	8.735133
107	133Cs	133	55	78	8.733515
108	136Ba	136	56	80	8.724908
109	135Ba	135	56	79	8.722072
110	137Ba	137	56	81	8.711628
111	138Ba	138	56	82	8.710904
112	27Al	27	13	14	8.708242
113	140Ce	140	58	82	8.700494
114	139La	139	57	82	8.698892
115	26Mg	26	12	14	8.694981
116	141Pr	141	59	82	8.681405
117	142Nd	142	60	82	8.676646
118	24Mg	24	12	12	8.651911
119	25Mg	25	12	13	8.599047
120	156Gd	156	64	92	8.536342
121	157Gd	157	64	93	8.522478
122	158Gd	158	64	94	8.518775
123	159Tb	159	65	94	8.508680
124	23Na	23	11	12	8.485675
125	163Dy	163	66	97	8.478607
126	164Dy	164	66	98	8.473604
127	22Ne	22	10	12	8.436087
128	20Ne	20	10	10	8.423422
129	16O	16	8	8	8.367390
130	21Ne	21	10	11	8.344280
131	19F	19	9	10	8.149612
132	17O	17	8	9	8.118904
133	18O	18	8	10	8.114744
134	12C	12	6	6	8.071327
135	15N	15	7	8	8.064594
136	14N	14	7	7	7.866827
137	13C	13	6	7	7.830943
138	4He	4	2	2	7.465077
139	11B	11	5	6	7.283337
140	10B	10	5	5	6.866257
141	9Be	9	4	5	6.810483
142	7Li	7	3	4	5.941599
143	6Li	6	3	3	5.723527
144	3He	3	2	1	3.094327
145	2H	2	1	1	1.503327
146	1H	1	1	0	0.782327

Nuclides that are observationally stable, having theoretical decay modes other than spontaneous fission

Ordered by "energy".

No.	Nuclide	A	Z	N	Energy	Decay mode	Decay energy (MeV)
147	80Se	80	34	46	9.043326	(β−β−)	0.134
148	86Kr	86	36	50	9.039532	(β−β−)	1.256
149	84Sr	84	38	46	9.031375	(β+β+)	1.787
150	102Pd	102	46	56	8.933337	(β+β+)	1.172
151	104Ru	104	44	60	8.918337	(β−β−)	1.300
152	36Ar	36	18	18	8.911105	(β+β+)	0.433
153	122Sn	122	50	72	8.808590	(β−β−)	0.366
154	143Nd	143	60	83	8.658792	(α)	0.521
155	150Sm	150	62	88	8.585043	(α)	1.449
156	152Sm	152	62	90	8.563227	(α)	0.220
157	154Gd	154	64	90	8.549985	(α)	0.081
158	155Gd	155	64	91	8.536341	(α)	0.081
159	164Er	164	68	96	8.473462	(β+β+, α)	0.024, 1.304
160	165Ho	165	67	98	8.464689	(α)	0.139
161	166Er	166	68	98	8.462482	(α)	0.831
162	167Er	167	68	99	8.450350	(α)	0.666
163	168Er	168	68	100	8.446308	(α)	0.553
164	169Tm	169	69	100	8.433931	(α)	1.200
165	170Yb	170	70	100	8.428792	(α)	1.738
166	171Yb	171	70	101	8.418182	(α)	1.559
167	172Yb	172	70	102	8.415864	(α)	1.310
168	173Yb	173	70	103	8.404023	(α)	0.946
169	174Yb	174	70	104	8.398624	(α)	0.740
170	175Lu	175	71	104	8.386589	(α)	1.620
171	181Ta	181	73	108	8.338961	(α)	1.526
172	185Re	185	75	110	8.308204	(α)	2.195
173	191Ir	191	77	114	8.263508	(α)	2.084
174	194Pt	194	78	116	8.250519	(α)	1.504
175	193Ir	193	77	116	8.250259	(α)	1.017
176	195Pt	195	78	117	8.239516	(α)	1.158
177	196Pt	196	78	118	8.237896	(α)	0.794
178	197Au	197	79	118	8.229404	(α)	0.954
179	198Hg	198	80	118	8.227663	(α)	1.383
180	199Hg	199	80	119	8.219805	(α)	0.824
181	200Hg	200	80	120	8.218848	(α)	0.718
182	201Hg	201	80	121	8.208956	(α)	0.334
183	202Hg	202	80	122	8.206703	(α)	0.136
184	203Tl	203	81	122	8.198230	(α)	0.911
185	204Hg	204	80	124	8.192358	(β−β−)	0.416
186	205Tl	205	81	124	8.187526	(α)	0.157

Observationally stable nuclides for which decay has been searched for but not found (only lower bounds known)

Ordered by lower bound on half-life.

No.	Nuclide	A	Z	N	Energy	Half-life (seconds)	Half-life (years)	Decay mode	Decay energy (MeV)
187	40Ca	40	20	20	8.942485	> 3.1×1029	> 9.9×1021	(β+β+)	0.194
188	184W	184	74	110	8.319737	> 2.8×1029	> 8.9×1021	(α)	1.656
189	182W	182	74	108	8.336424	> 2.4×1029	> 7.7×1021	(α)	1.772
190	208Pb	208	82	126	8.175888	> 8.2×1028	> 2.6×1021	(α)	0.519
191	206Pb	206	82	124	8.186791	> 7.9×1028	> 2.5×1021	(α)	1.137
192	126Xe	126	54	72	8.779010	> 6.0×1028	> 1.9×1021	(β+β+)	0.897
193	207Pb	207	82	125	8.179791	> 6.0×1028	> 1.9×1021	(α)	0.391
194	120Te	120	52	68	8.816369	> 5.0×1028	> 1.6×1021	(β+β+)	1.700
195	106Cd	106	48	58	8.893327	> 3.5×1028	> 1.1×1021	(β+β+)	2.770
196	134Xe	134	54	80	8.728973	> 2.7×1028	> 8.7×1020	(β−β−)	0.825
197	58Ni	58	28	30	9.109736	> 2.2×1028	> 7.0×1020	(β+β+)	1.926
198	183W	183	74	109	8.324699	> 2.1×1028	> 6.7×1020	(α)	1.680
199	54Fe	54	26	28	9.113040	> 1.4×1028	> 4.4×1020	(β+β+)	0.680
200	132Ba	132	56	76	8.741288	> 9.5×1027	> 3.0×1020	(β+β+)	0.846
201	110Pd	110	46	64	8.874500	> 9.1×1027	> 2.9×1020	(β−β−)	2.000
202	92Mo	92	42	50	9.014860	> 6.0×1027	> 1.9×1020	(β+β+)	1.649
203	204Pb	204	82	122	8.194414	> 4.4×1027	> 1.4×1020	(α)	1.972
204	112Sn	112	50	62	8.862944	> 3.1×1027	> 9.7×1019	(β+β+)	1.922
205	96Ru	96	44	52	8.967911	> 2.5×1027	> 8.0×1019	(β+β+)	2.719
206	192Os	192	76	116	8.258202	> 1.7×1027	> 5.3×1019	(β−β−, α)	0.413, 0.362
207	198Pt	198	78	120	8.222378	> 1.0×1027	> 3.2×1019	(β−β−, α)	1.047, 0.087
208	160Gd	160	64	96	8.496009	> 9.8×1026	> 3.1×1019	(β−β−)	1.729
209	144Sm	144	62	82	8.640577	> 4.4×1026	> 1.4×1019	(β+β+)	1.781
210	190Os	190	76	114	8.275045	> 3.8×1026	> 1.2×1019	(α)	1.378
211	64Zn	64	30	34	9.102634	> 3.5×1026	> 1.1×1019	(β+β+)	1.096
212	74Se	74	34	40	9.047175	> 2.2×1026	> 7.0×1018	(β+β+)	1.209
213	186W	186	74	112	8.299873	> 1.3×1026	> 4.1×1018	(α)	1.123
214	70Zn	70	30	40	9.065109	> 1.2×1026	> 3.8×1018	(β−β−)	0.998
215	188Os	188	76	112	8.290138	> 1.0×1026	> 3.3×1018	(α)	2.143
216	148Nd	148	60	88	8.594388	> 9.5×1025	> 3.0×1018	(β−β−, α)	1.929, 0.599
217	142Ce	142	58	84	8.666666	> 9.1×1025	> 2.9×1018	(β−β−, α)	1.417, 1.298
218	179Hf	179	72	107	8.353293	> 8.5×1025	> 2.7×1018	(α)	1.806
219	196Hg	196	80	116	8.233710	> 7.9×1025	> 2.5×1018	(β+β+, α)	0.820, 2.027
220	154Sm	154	62	92	8.541857	> 7.3×1025	> 2.3×1018	(β−β−)	1.251
221	146Nd	146	60	86	8.625649	> 5.0×1025	> 1.6×1018	(β−β−, α)	0.070, 1.182
222	50Cr	50	24	26	9.076517	> 4.1×1025	> 1.3×1018	(β+β+)	1.167
223	178Hf	178	72	106	8.365958	> 4.1×1025	> 1.3×1018	(α)	2.083
224	177Hf	177	72	105	8.370139	> 3.5×1025	> 1.1×1018	(α)	2.245
225	156Dy	156	66	90	8.523443	> 3.2×1025	> 1.0×1018	(β+β+, α)	2.011, 1.758
226	153Eu	153	63	90	8.550893	> 1.8×1025	> 5.5×1017	(α)	0.274
227	180Hf	180	72	108	8.347930	> 1.5×1025	> 4.6×1017	(α)	1.283
228	108Cd	108	48	60	8.897735	> 1.3×1025	> 4.1×1017	(β+β+)	0.272
229	170Er	170	68	102	8.424945	> 1.3×1025	> 4.1×1017	(β−β−, α)	0.654, 0.050
230	138Ce	138	58	80	8.705878	> 1.3×1025	> 4.0×1017	(β+β+)	0.694
231	180mTa	180	73	107	8.342767	> 9.1×1024	> 2.9×1017	(β−, ε, α)	0.783, 0.929, 2.103
232	176Hf	176	72	104	8.381427	> 8.5×1024	> 2.7×1017	(α)	2.255
233	46Ca	46	20	26	9.009047	> 5.7×1024	> 1.8×1017	(β−β−)	0.988
234	176Yb	176	70	106	8.375271	> 5.0×1024	> 1.6×1017	(β−β−, α)	1.083, 0.570
235	94Zr	94	40	54	8.999698	> 3.5×1024	> 1.1×1017	(β−β−)	1.144
236	124Sn	124	50	74	8.782914	> 3.2×1024	> 1.0×1017	(β−β−)	2.287
237	162Dy	162	66	96	8.492234	> 3.2×1024	> 1.0×1017	(α)	0.085
238	136Ce	136	58	78	8.707122	> 3.0×1024	> 9.6×1016	(β+β+)	2.419
239	114Cd	114	48	66	8.860985	> 2.9×1024	> 9.2×1016	(β−β−)	0.540
240	123Te	123	52	71	8.796302	> 2.9×1024	> 9.2×1016	(ε)	0.052
241	145Nd	145	60	85	8.632963	> 1.9×1024	> 6.0×1016	(α)	1.578
242	192Pt	192	78	114	8.260353	> 1.9×1024	> 6.0×1016	(α)	2.418
243	161Dy	161	66	95	8.494067	> 1.1×1024	> 3.5×1016	(α)	0.344
244	160Dy	160	66	94	8.506816	> 2.7×1023	> 8.5×1015	(α)	0.439
245	189Os	189	76	113	8.277599	> 1.1×1023	> 3.5×1015	(α)	1.976
246	187Os	187	76	111	8.291746	> 1.0×1023	> 3.2×1015	(α)	2.720
247	149Sm	149	62	87	8.589058	> 6.3×1022	> 2.0×1015	(α)	1.870
248	158Dy	158	66	92	8.516973	> 3.2×1022	> 1.0×1015	(β+β+, α)	0.283, 0.875
249	162Er	162	68	94	8.480852	> 4.4×1021	> 1.4×1014	(β+β+, α)	1.844, 1.646
250	168Yb	168	70	98	8.437845	> 4.1×1021	> 1.3×1014	(β+β+, α)	1.422, 1.951
251	98Mo	98	42	56	8.970426	> 3.2×1021	> 1.0×1014	(β−β−)	0.112

Primordial radioactive nuclides (half-life > 5 × 10⁸ years)

Main article: Chemistry:Primordial nuclide

Ordered by half-life.

No.	Nuclide	A	Z	N	Energy	Half-life		Decay mode	Decay energy (MeV)
						(seconds)	(years)
252	128Te	128	52	76	8.743261	6.94×1031	2.2×1024	β−β−	0.868
253	124Xe	124	54	70	8.778264	5.68×1029	1.8×1022	εε	2.864
254	78Kr	78	36	42	9.022349	2.90×1029	9.2×1021	εε	2.846
255	136Xe	136	54	82	8.706805	7.5×1028	2.38×1021	β−β−	2.462
256	76Ge	76	32	44	9.034656	5.642×1028	1.8×1021	β−β−	2.039
257	130Ba	130	56	74	8.742574	3.79×1028	1.2×1021	εε	2.620
258	82Se	82	34	48	9.017596	3.408×1027	1.1×1020	β−β−	2.995
259	48Ca	48	20	28	8.992452	1.766×1027	5.6×1019	β−β−	4.274
260	116Cd	116	48	68	8.836146	9.783×1026	3.1×1019	β−β−	2.809
261	209Bi	209	83	126	8.158689	6.343×1026	2.01×1019	α	3.137
262	96Zr	96	40	56	8.961359	6.3×1026	2.0×1019	β−β−	3.348
263	130Te	130	52	78	8.766578	2.777×1026	8.8×1018	β−β−	2.530
264	150Nd	150	60	90	8.562594	2.493×1026	7.9×1018	β−β−	3.367
265	100Mo	100	42	58	8.933167	2.461×1026	7.8×1018	β−β−	3.035
266	151Eu	151	63	88	8.565759	1.458×1026	4.62×1018	α	1.964
267	180W	180	74	106	8.347127	5.680×1025	1.8×1018	α	2.509
268	50V	50	23	27	9.055759	4.418×1024	1.4×1017	β+, β−	2.205, 1.038
269	174Hf	174	72	102	8.392287	2.2×1024	7.0×1016	α	2.497
270	113Cd	113	48	65	8.859372	2.430×1023	7.7×1015	β−	0.321
271	148Sm	148	62	86	8.607423	1.988×1023	6.3×1015	α	1.986
272	144Nd	144	60	84	8.652947	7.227×1022	2.29×1015	α	1.905
273	186Os	186	76	110	8.302508	6.312×1022	2.0×1015	α	2.823
274	115In	115	49	66	8.849910	1.392×1022	4.4×1014	β−	0.499
275	152Gd	152	64	88	8.562868	3.408×1021	1.1×1014	α	2.203
276	184Os	184	76	108	8.311850	3.53×1020	1.12×1013	α	2.963
277	190Pt	190	78	112	8.267764	1.524×1019	4.83×1011	α	3.252
278	147Sm	147	62	85	8.610593	3.345×1018	1.06×1011	α	2.310
279	138La	138	57	81	8.698320	3.219×1018	1.02×1011	ε, β−	1.737, 1.044
280	87Rb	87	37	50	9.043718	1.568×1018	4.97×1010	β−	0.283
281	187Re	187	75	112	8.291732	1.300×1018	4.12×1010	β−	0.0026
282	176Lu	176	71	105	8.374665	1.187×1018	3.764×1010	β−	1.193
283	232Th	232	90	142	7.918533	4.434×1017	1.406×1010	α, SF	4.083
284	238U	238	92	146	7.872551	1.410×1017	4.471×109	α, SF, β−β−	4.270
285	40K	40	19	21	8.909707	3.938×1016	1.25×109	β−, ε, β+	1.311, 1.505, 1.505
286	235U	235	92	143	7.897198	2.222×1016	7.04×108	α, SF	4.679

Radionuclides with half-lives of 10,000 years to 5 × 10⁸ years

Ordered by half-life. Some of these are known to have been present in the early Solar System (marked "ESS", meaning the first few million years of the Solar System's history), because of an excess of their decay products.

No.	Nuclide	Z	N	Energy	Half-life		Decay mode	Notes
					(seconds)	(years)
287	146Sm	62	84	8.626136	3.250×1015	1.03×108	α	ESS
288	244Pu	94	150	7.826221	2.525×1015	8.0×107	α, SF	interstellar, ESS
289	92Nb	41	51	9.010980	1.095×1015	3.47×107	β+, β−	CG, ESS
290	236U	92	144	7.891470	7.391×1014	2.34×107	α, SF	DP
291	205Pb	82	123	8.187279	5.459×1014	1.73×107	β+	ESS
292	129I	53	76	8.757397	4.955×1014	1.57×107	β−	CG, FP, ESS
293	247Cm	96	151	7.806008	4.923×1014	1.56×107	α	ESS
294	182Hf	72	110	8.324399	2.809×1014	8.90×106	β−	ESS
295	107Pd	46	61	8.897197	2.051×1014	6.50×106	β−	FP, ESS
296	97Tc	43	54	8.970503	1.329×1014	4.21×106	β+
297	98Tc	43	55	8.953246	1.325×1014	4.20×106	β−
298	53Mn	25	28	9.103175	1.180×1014	3.74×106	β+	CG, ESS
299	60Fe	26	34	9.094861	8.268×1013	2.62×106	β−	CG, interstellar, ESS
300	210mBi	83	127	8.140473	9.594×1013	2.58×106	α
301	237Np	93	144	7.881989	6.766×1013	2.14×106	α, SF	DP
302	150Gd	64	86	8.576454	5.649×1013	1.79×106	α
303	93Zr	40	53	9.008069	4.828×1013	1.53×106	β−	FP
304	10Be	4	6	6.810657	4.765×1013	1.51×106	β−	CG, ESS
305	154Dy	66	88	8.528457	4.415×1013	1.40×106	α
306	135Cs	55	80	8.720082	4.194×1013	1.33×106	β−	FP
307	26Al	13	13	8.540954	2.263×1013	717000	β+	CG, ESS
308	242Pu	94	148	7.845218	1.183×1013	375000	α, SF
309	208Bi	83	125	8.162049	1.161×1013	368000	β+
310	248Cm	96	152	7.799586	1.098×1013	348000	α, SF
311	36Cl	17	19	8.891380	9.499×1012	301000	β−, β+	CG, IM
312	79Se	34	45	9.032310	9.309×1012	295000	β−	FP
313	234U	92	142	7.908308	7.747×1012	245500	α, SF	DP
314	126Sn	50	76	8.754026	7.258×1012	223000	β−	FP
315	81Kr	36	45	9.030513	7.227×1012	229000	β+	CG
316	99Tc	43	56	8.953379	6.662×1012	211100	β−	FP, DP
317	186mRe	75	111	8.295958	6.312×1012	200000	IT
318	233U	92	141	7.912873	5.024×1012	159200	α, SF	DP
319	236Np	93	143	7.887514	4.860×1012	154000	β+, β−, α
320	41Ca	20	21	8.928347	3.219×1012	102000	β+	CG, ESS
321	59Ni	28	31	9.107863	2.398×1012	76000	β+
322	230Th	90	140	7.937136	2.379×1012	75400	α, SF	DP
323	137La	57	80	8.707101	1.893×1012	60000	β+
324	202Pb	82	120	8.199714	1.657×1012	52500	β+, α
325	231Pa	91	140	7.926627	1.034×1012	32770	α, SF	DP
326	239Pu	94	145	7.868022	7.609×1011	24110	α, SF	IM, DP
327	94Nb	41	53	8.990099	6.406×1011	20300	β−	CG

Radionuclides with half-lives of 10 years to 10,000 years

Ordered by half-life.

no	nuclide	Z	N	energy	half-life (seconds)	half-life (years)	decay mode	notes
328	250Cm	96	154	7.779371	2.619×1011	8300	SF, α, β−
329	245Cm	96	149	7.822329	2.60×1011	8250	α, SF
330	243Am	95	148	7.836035	2.326×1011	7371	α, SF
331	229Th	90	139	7.942127	2.316×1011	7339	α	DP
332	240Pu	94	146	7.862465	2.070×1011	6560	α, SF	DP
333	14C	6	8	7.855620	1.799×1011	5700	β−	CG, IM
334	93Mo	42	51	9.004693	1.53×1011	4839	β+
335	246Cm	96	150	7.816781	1.502×1011	4760	α, SF
336	163Ho	67	96	8.478591	1.442×1011	4570	β+
337	226Ra	88	138	7.966597	5.049×1010	1600	α	DP
338	247Bk	97	150	7.806182	4.355×1010	1380	α
339	166mHo	67	99	8.451273	3.787×1010	1200	β−
340	251Cf	98	153	7.775969	2.834×1010	898	α, SF
341	91Nb	41	50	9.023327	2.146×1010	680	β+
342	194Hg	80	114	8.237271	1.401×1010	444	β+
343	108mAg	47	61	8.881439	1.382×1010	437.9	β+, IT
344	241Am	95	146	7.851676	1.364×1010	432.2	α, SF	IM
345	249Cf	98	151	7.791305	1.108×1010	351.1	α, SF
346	248Bk	97	151	7.796811	> 9.47×109	>300	α
347	39Ar	18	21	8.923686	8.489×109	269	β−	CG
348	192mIr	77	115	8.251875	7.605×109	241	IT
349	158Tb	65	93	8.511055	5.680×109	180	β+, β−
350	242mAm	95	147	7.841913	4.450×109	141	IT, α, SF
351	32Si	14	18	8.823856	4.166×109	132	β−	CG
352	209Po	84	125	8.149633	3.951×109	125.2	α, β+
353	63Ni	28	35	9.111210	3.159×109	101	β−	IM
354	151Sm	62	89	8.565251	2.840×109	90.0	β−	FP
355	238Pu	94	144	7.877358	2.768×109	87.7	α, SF	IM, DP
356	148Gd	64	84	8.586706	2.74×109	86.9	α
357	157Tb	65	92	8.522096	2.241×109	71.0	β+
358	232U	92	140	7.922143	2.174×109	68.9	α, SF
359	44Ti	22	22	8.924702	1.893×109	59.1	β+
360	193Pt	78	115	8.249965	1.578×109	50.0	β+
361	121mSn	50	71			43.89	IT, β−
362	150Eu	63	87			36.89	β+
363	42Ar	18	24			32.9	β−
364	207Bi	83	124			31.6	β+
365	178m2Hf	72	106			31	IT
366	137Cs	55	82			30.1	β−	FP, IM
367	243Cm	96	147			29.1	α, β+, SF
368	90Sr	38	52			28.9	β−	FP, IM
369	210Pb	82	128			22.2	β−, α	DP, IM
370	227Ac	89	138			21.77	β−, α	DP
371	244Cm	96	148			18.1	α, SF
372	145Pm	61	84			17.7	β+, α
373	93mNb	41	52			16.1	IT
374	241Pu	94	147			14.3	β−, α, SF
375	113mCd	48	65			13.9	β−, IT	FP
376	152Eu	63	89			13.51	β+, β−
377	250Cf	98	152			13.08	α, SF
378	3H	1	2			12.32	β−	CG, IM
379	85Kr	36	49			10.72	β−	FP, IM
380	133Ba	56	77			10.52	β+

Radionuclides with half-lives of 1 day to 10 years

Ordered by half-life.

no	nuclide	Z	N	energy	half-life (seconds)	half-life	decay mode	notes
381	154Eu	63	91			8.60 y	β−, β+
382	194Os	76	118			6.0 y	β−
383	228Ra	88	140			5.75 y	β−	DP
384	146Pm	61	85			5.53 y	β+, β−
385	60Co	27	33			5.27 y	β−	IM
386	155Eu	63	92			4.75 y	β−	FP
387	204Tl	81	123			3.78 y	β−, β+	IM
388	174Lu	71	103			3.31 y	β+
389	101Rh	45	56			3.3 y	β+
390	102mRh	45	57			2.9 y	β+, IT
391	208Po	84	124			2.898 y	α, β+
392	236Pu	94	142			2.858 y	α, SF
393	125Sb	51	74			2.759 y	β−	FP
394	55Fe	26	29			2.737 y	β+
395	252Cf	98	154			2.645 y	α, SF	IM
396	147Pm	61	86			2.624 y	β−	FP, DP
397	22Na	11	11			2.603 y	β+	CG
398	134Cs	55	79			2.065 y	β−, β+	FP
399	171Tm	69	102			1.92 y	β−
400	228Th	90	138			1.912 y	α	DP
401	172Hf	72	100			1.87 y	β+
402	179Ta	73	106			1.82 y	β+
403	173Lu	71	102			1.37 y	β+
404	252Es	99	153			1.291 y	α, β+, β−
405	109Cd	48	61			1.263 y	β+
406	235Np	93	142			1.084 y	β+, α
407	106Ru	44	62			1.023 y	β−	FP
408	144Pm	61	83			363 d	β+
409	145Sm	62	83			340 d	β+
410	248Cf	98	150			333.4 d	α, SF
411	249Bk	97	152			330 d	β−, α, SF
412	49V	23	26			329.1 d	β+
413	54Mn	25	29			312.2 d	β+, β−	IM
414	119m1Sn	50	69			293.1 d	IT
415	144Ce	58	86			285 d	β−	FP
416	254Es	99	155			275.7 d	α, β−, SF, β+
417	57Co	27	30			271.8 d	β+	IM
418	68Ge	32	36			271 d	β+	IM
419	143Pm	61	82			265 d	β+
420	110mAg	47	63			249.8 d	β−, IT
421	65Zn	30	35			243.6 d	β+	IM
422	153Gd	64	89			240.4 d	β+	IM
423	102Rh	45	57			207 d	β+, β−
424	195Au	79	116			186.1 d	β+
425	194mIr	77	117			170.9 d	β−
426	184mRe	75	109			169 d	IT, β+
427	242Cm	96	146			162.8 d	α, SF
428	45Ca	20	25			162.6 d	β−
429	177mLu	71	106			160.4 d	β−, IT
430	121mTe	52	69			154.1 d	IT, β+
431	159Dy	66	93			144.4 d	β+
432	174m1Lu	71	103			142 d	IT, EC
433	210Po	84	126			138.4 d	α	DP
434	139Ce	58	81			137.6 d	β+
435	123Sn	50	73			129.2 d	β−
436	170Tm	69	101			128.6 d	β−, β+
437	151Gd	64	87			124 d	β+, α
438	181W	74	107			121.2 d	β+
439	75Se	34	41			119.8 d	β+	IM
440	123mTe	52	71			119.2 d	IT
441	113Sn	50	63			115.1 d	β+
442	182Ta	73	109			114.4 d	β−
443	127mTe	52	75			109 d	IT
444	88Y	39	49			106.6 d	β+
445	257Fm	100	157			100.5 d	α, SF
446	185Os	76	109			93.6 d	β+
447	168Tm	69	99			93.1 d	β+, β−
448	149Eu	63	86			93.1 d	β+
449	97mTc	43	54			91 d	IT
450	35S	16	19			87.51 d	β−	CG
451	83Rb	37	46			86.2 d	β+
452	46Sc	21	25			83.78 d	β−
453	88Zr	40	48			83.4 d	β+
454	73As	33	40			80.3 d	β+
455	56Co	27	29			77.23 d	β+
456	185W	74	111			75.1 d	β−
457	192Ir	77	115			73.827 d	β−,ε	IM
458	160Tb	65	95			72.3 d	β−
459	58Co	27	31			70.86 d	β+
460	183Re	75	108			70 d	β+
461	175Hf	72	103			70 d	β+
462	188W	74	114			69.78 d	β−
463	85Sr	38	47			64.84 d	β+
464	95Zr	40	55			64.03 d	β−	FP
465	95mTc	43	52			61 d	β+, IT
466	91mNb	41	50			60.86 d	IT,ε
467	254Cf	98	156			60.5 d	SF, α
468	124Sb	51	73			60.12 d	β−
469	125I	53	72			59.4 d	β+	IM
470	91Y	39	52			58.51 d	β−	FP
471	125mTe	52	73			57.4 d	IT
472	148Eu	63	85			54.5 d	β+, α
473	7Be	4	3			53.22 d	β+	CG
474	258Md	101	157			51.5 d	α, SF
475	89Sr	38	51			50.57 d	β−	FP, IM
476	114mIn	49	65			49.51 d	IT, β+
477	146Gd	64	82			48.28 d	β+
478	203Hg	80	123			46.6 d	β−
479	237Pu	94	143			45.2 d	β+, α
480	115mCd	48	67			44.56 d	β−
481	59Fe	26	33			44.49 d	β−	IM
482	181Hf	72	109			42.38 d	β−
483	148mPm	61	87			41.28 d	β−, IT
484	105Ag	47	58			41.28 d	β+
485	255Es	99	156			39.8 d	β−, α, SF
486	103Ru	44	59			39.26 d	β−	FP
487	127Xe	54	73			36.4 d	β+
488	184Re	75	109			35.4 d	β+
489	95Nb	41	54			34.99 d	β−	FP
490	37Ar	18	19			34.95 d	β+	CG
491	129mTe	52	77			33.6 d	IT, β−
492	84Rb	37	47			33.1 d	β+, β−
493	241Cm	96	145			32.8 d	β+, α
494	141Ce	58	83			32.51 d	β−	FP
495	169Yb	70	99			32.03 d	β+	IM
496	260Md	101	159			31.81 d	SF, α, β+, β−
497	51Cr	24	27			27.7 d	β+	IM
498	240Cm	96	144			27 d	α, β+, SF
499	233Pa	91	142			26.98 d	β−	DP
500	82Sr	38	44			25.56 d	β+	IM
501	33P	15	18			25.34 d	β−
502	179m2Hf	72	107			25.05 d	IT
503	234Th	90	144			24.1 d	β−	DP
504	147Eu	63	84			24.1 d	β+, α
505	178W	74	104			21.6 d	β+
506	230U	92	138			20.8 d	α, SF
507	253Es	99	154			20.5 d	α, SF
508	121Te	52	69			19.2 d	ε
509	227Th	90	137			18.7 d	α	DP
510	86Rb	37	49			18.6 d	β−, β+
511	253Cf	98	155			17.8 d	β−, α
512	74As	33	41			17.8 d	β+, β−
513	230Pa	91	139			17.4 d	β+, β−, α
514	103Pd	46	57			17.0 d	β+	IM
515	99Rh	45	54			16.1 d	β+
516	48V	23	25			15.97 d	β+
517	191Os	76	115			15.41 d	β−
518	205Bi	83	122			15.31 d	β+
519	156Eu	63	93			15.19 d	β−
520	225Ra	88	137			14.9 d	β−	DP
521	32P	15	17			14.268 d	β−	CG, IM
522	117mSn	50	67			14 d	IT
523	143Pr	59	84			13.56 d	β−
524	189Ir	77	112			13.19 d	β+
525	136Cs	55	81			13.04 d	β−
526	126I	53	73			12.93 d	β+, β−
527	140Ba	56	84			12.75 d	β−	FP
528	126Sb	51	75			12.35 d	β−
529	202Tl	81	121			12.23 d	β+
530	131mXe	54	77			11.84 d	IT
531	190Ir	77	113			11.78 d	β+
532	131Ba	56	75			11.5 d	β+
533	223Ra	88	135			11.43 d	α	DP, IM
534	71Ge	32	39			11.43 d	β+
535	147Nd	60	87			10.98 d	β−
536	246Pu	94	152			10.84 d	β−
537	193mIr	77	116			10.53 d	IT
538	188Pt	78	110			10.2 d	β+, α
539	92mNb	41	51			10.15 d	β+, α
540	225Ac	89	136			9.92 d	α	DP
541	131Cs	55	76			9.69 d	β+	IM
542	125Sn	50	75			9.64 d	β−
543	169Er	68	101			9.39 d	β−	IM
544	149Gd	64	85			9.28 d	β+, α
545	167Tm	69	98			9.25 d	β+
546	129mXe	54	75			8.88 d	IT
547	206Po	84	122			8.80 d	β+, α
548	72Se	34	38			8.40 d	β+
549	106mAg	47	59			8.28 d	β+
550	171Lu	71	100			8.24 d	β+
551	131I	53	78			8.02 d	β−	FP, IM
552	257Es	99	158			7.7 d	β−, SF
553	111Ag	47	64			7.45 d	β−
554	161Tb	65	96			6.91 d	β−
555	237U	92	145			6.75 d	β−	DP
556	172Lu	71	101			6.70 d	β+	IM
557	177Lu	71	106			6.65 d	β−
558	132Cs	55	77			6.48 d	β+, β−
559	206Bi	83	123			6.24 d	β+
560	196Au	79	117			5.17 d	β+, β−
561	56Ni	28	28			6.08 d	β+
562	118Te	52	66			6 d	β+
563	145Eu	63	82			5.93 d	β+
564	120mSb	51	69			5.76 d	β+
565	52Mn	25	27			5.59 d	β+
566	148Pm	61	87			5.37 d	β−
567	156Tb	65	91			5.35 d	β+
568	155Tb	65	90			5.32 d	β+
569	133Xe	54	79			5.24 d	β−	IM
570	183Ta	73	110			5.10 d	β−
571	210Bi	83	127			5.01 d	β−, α	DP
572	245Bk	97	148			4.94 d	β+, α
573	119mTe	52	67			4.7 d	β+, IT
574	146Eu	63	83			4.61 d	β+
575	47Ca	20	27			4.54 d	β−
576	234Np	93	141			4.4 d	β+
577	101mRh	45	56			4.34 d	ε, IT
578	193mPt	78	115			4.33 d	IT
579	96Tc	43	53			4.28 d	β+
580	231U	92	139			4.2 d	β+, α
581	175Yb	70	105			4.19 d	β−
582	124I	53	71			4.18 d	β+	IM
583	195mPt	78	117			4.01 d	IT
584	127Sb	51	76			3.85 d	β−
585	222Rn	86	136			3.82 d	α	DP
586	186Re	75	111			3.72 d	β−,e	IM
587	224Ra	88	136			3.63 d	α	DP
588	100Pd	46	54			3.63 d	β+
589	95mNb	41	54			3.61 d	IT, β−
590	166Dy	66	100			3.4 d	β−
591	140Nd	60	80			3.37 d	β+
592	47Sc	21	26			3.35 d	β−
593	87Y	39	48			3.33 d	β+
594	89Zr	40	49			3.27 d	β+
595	67Ga	31	36			3.26 d	β+	IM
596	132Te	52	80			3.2 d	β−	FP
597	134Ce	58	76			3.16 d	β+
598	199Au	79	120			3.14 d	β−
599	201Tl	81	120			3.04 d	β+	IM
600	253Fm	100	153			3. d	β+, α
601	191Pt	78	113			2.86 d	β+
602	111In	49	62			2.8 d	β+	IM
603	97Ru	44	53			2.79 d	β+
604	99Mo	42	57			2.75 d	β−	FP, IM
605	122Sb	51	71			2.72 d	β−, β+
606	71As	33	38			2.72 d	β+
607	198Au	79	119			2.7 d	β−	IM
608	197Hg	80	117			2.67 d	β+
609	90Y	39	51			2.67 d	β−	IM
610	182Re	75	107			2.67 d	β+
611	172Tm	69	103			2.65 d	β−
612	67Cu	29	38			2.58 d	β−	IM
613	44mSc	21	23			2.44 d	IT, β+
614	128Ba	56	72			2.43 d	β+
615	77Br	35	42			2.38 d	β+
616	166Yb	70	96			2.36 d	β+
617	177Ta	73	104			2.36 d	β+
618	239Np	93	146			2.36 d	β−	DP
619	153Tb	65	88			2.34 d	β+
620	66Ni	28	38			2.28 d	β−
621	247Pu	94	153			2.27 d	β−
622	198m2Au	79	119			2.27 d	IT
623	115Cd	48	67			2.23 d	β−
624	149Pm	61	88			2.21 d	β−
625	133mXe	54	79			2.20 d	IT
626	203Pb	82	121			2.16 d	β+
627	238Np	93	145			2.12 d	β−
628	240Am	95	145			2.12 d	β+, α
629	172Er	68	104			2.05 d	β−
630	170Lu	71	99			2.01 d	β+
631	72Zn	30	42			1.94 d	β−
632	153Sm	62	91			1.93 d	β−	IM
633	202Pt	78	124			1.83 d	β−
634	48Sc	21	27			1.82 d	β−
635	246Bk	97	149			1.8 d	β+, α
636	195mHg	80	115			1.73 d	IT, β+
637	188Ir	77	111			1.73 d	β+
638	140La	57	83			1.68 d	β−
639	254mEs	99	155			1.64 d	β−, IT, α, EC, SF
640	69Ge	32	37			1.63 d	β+
641	133mBa	56	77			1.62 d	IT,e
642	77As	33	44			1.62 d	β−
643	119Sb	51	68			1.59 d	β+
644	147Gd	64	83			1.59 d	β+
645	194Au	79	115			1.58 d	β+
646	229Pa	91	138			1.5 d	β+, α
647	246Cf	98	148			1.49 d	α, β+, SF
648	57Ni	28	29			1.48 d	β+
649	105Rh	45	60			1.47 d	β−	FP
650	82Br	35	47			1.47 d	β−
651	79Kr	36	43			1.46 d	β+
652	137mCe	58	79			1.43 d	IT, β+
653	169Lu	71	98			1.42 d	β+
654	143Ce	58	85			1.38 d	β−
655	251Es	99	152			1.38 d	β+, α
656	83Sr	38	45			1.35 d	β+
657	129Cs	55	74			1.34 d	β+
658	268Db	105	163			1.33 d	SF, EC, α
659	232Pa	91	141			1.31 d	β−, β+
660	193Os	76	117			1.25 d	β−
661	165Tm	69	96			1.25 d	β+
662	131mTe	52	79			1.25 d	β−, IT
663	226Ac	89	137			1.22 d	β−, β+, α
664	160Er	68	92			1.19 d	β+
665	151Pm	61	90			1.18 d	β−
666	135mBa	56	79			1.17 d	IT
667	121Sn	50	71			1.13 d	β−
668	166Ho	67	99			1.12 d	β−	IM
669	76As	33	43			1.09 d	β−
670	200Tl	81	119			1.09 d	β+
671	72As	33	39			1.08 d	β+
672	231Th	90	141			1.06 d	β−, α	DP
673	252Fm	100	152			1.06 d	α, SF
674	156mTb	65	91			1.02 d	IT
675	189Re	75	114			1.01 d	β−

Radionuclides with half-lives of 1 hour to 1 day

Ordered by half-life.

no	nuclide	Z	N	energy	half-life (seconds)	half-life (hours)	decay mode	notes
676	197mHg	80	117			23.8	IT
677	187W	74	113			23.7	β−
678	248mBk	97	151			23.7	β−, EC (30)
679	173Hf	72	101			23.6	β+
680	96Nb	41	55			23.4	β−
681	154m2Tb	65	89			22.7	β+, IT (1.8)
682	236mNp	93	143			22.5	EC, β− (50)
683	43K	19	24			22.3	β−
684	182Os	76	106			22.1	β+
685	228Pa	91	137			22.0	β+, α (2)
686	48Cr	24	24			21.6	β+
687	154Tb	65	89			21.5	β+, β− (<0.1)
688	200Pb	82	118			21.5	β+
689	112Pd	46	66			21.0	β−
690	28Mg	12	16			20.9	β−	CG
691	100Rh	45	55			20.8	β+
692	133I	53	80			20.8	β−
693	122Xe	54	68			20.1	β+
694	255Fm	100	155			20.1	α, SF (tr)
695	95Tc	43	52			20.0	β+
696	181Re	75	106			19.9	β+
697	197Pt	78	119			19.9	β−
698	135La	57	78			19.5	β+
699	194Ir	77	117			19.3	β−
700	142Pr	59	83			19.1	β−,EC (tr)
701	200mAu	79	121			18.7	β−, IT (18)
702	159Gd	64	95			18.5	β−
703	135Ce	58	77			17.7	β+
704	193Au	79	114			17.7	β+
705	151Tb	65	86			17.6	β+, α (tr)
706	55Co	27	28			17.5	β+
707	152Tb	65	87			17.5	β+, α (tr)
708	188Re	75	113			17.0	β−	IM
709	125Xe	54	71			16.9	β+
710	97Zr	40	57			16.7	β−
711	186Ir	77	109			16.6	β+
712	86Zr	40	46			16.5	β+
713	76Br	35	41			16.2	β+
714	119Te	52	67			16.1	EC, e+ (2.1)
715	242Am	95	147			16.0	β−, EC (17)
716	170Hf	72	98			16.0	β+
717	157Eu	63	94			15.2	β−
718	24Na	11	13			15.0	β−	CG, IM
719	76Kr	36	40			14.8	β+
720	86Y	39	47			14.7	β+
721	211Rn	86	125			14.6	β+, α (27)
722	90Nb	41	49			14.6	β+
723	185Ir	77	108			14.4	β+
724	240U	92	148			14.1	β−	DP
725	72Ga	31	41			14.1	β−
726	69mZn	30	39			13.8	IT, β− (tr)
727	109Pd	46	63			13.7	β−
728	87mY	39	48			13.4	IT, β+ (1.6)
729	123I	53	70			13.2	β+	IM
730	191mOs	76	115			13.1	IT
731	183Os	76	107			13.0	β+
732	150mEu	63	87			12.8	β−, β+(11)
733	64Cu	29	35			12.7	β+, β− (38)	IM
734	182mRe	75	107			12.7	β+
735	200Pt	78	122			12.5	β−
736	130I	53	77			12.4	β−
737	42K	19	23			12.3	β−	IM
738	171Hf	72	99			12.1	β+
739	239Am	95	144			11.9	β+, α (0.01)
740	193mHg	80	113			11.8	β+, IT (7.2)
741	203Bi	83	120			11.8	β+
742	77Ge	32	45			11.3	β−
743	204Bi	83	121			11.2	β+
744	189Pt	78	111			10.9	β+
745	212Pb	82	130			10.6	β−	DP, IM
746	195Hg	80	115			10.5	β+
747	175Ta	73	102			10.5	β+
748	245Pu	94	151			10.5	β−
749	187Ir	77	110			10.5	β+
750	165Er	68	97			10.4	β+
751	93Y	39	54			10.2	β−
752	244Am	95	149			10.1	β−
753	266Lr	103	163			10.0	SF
754	154m1Tb	65	89			9.99	β+, IT(22)
755	183mOs	76	107			9.90	β+, IT(15)
756	155Dy	66	89			9.90	β+
757	91Sr	38	53			9.63	β−
758	196m2Au	79	117			9.60	IT
759	66Ga	31	35			9.49	β+
760	156Sm	62	94			9.40	β−
761	127Te	52	75			9.35	β−
762	201Pb	82	119			9.33	β+
763	152mEu	63	89			9.31	β−, β+(28)
764	62Zn	30	32			9.19	β+
765	135Xe	54	81			9.14	β−
766	58mCo	27	31			9.10	IT
767	128Sb	51	77			9.01	β−
768	137Ce	58	79			9.00	β+
769	234Pu	94	140			8.80	β+, α (~6)
770	184Ta	73	111			8.70	β−
771	250Es	99	151			8.60	β+, α (<3)
772	101Pd	46	55			8.47	β+
773	52Fe	26	26			8.28	β+
774	173Tm	69	104			8.24	β−
775	180Ta	73	107			8.15	EC, β− (14)
776	157Dy	66	91			8.14	β+
777	210At	85	125			8.10	β+, α (0.2)
778	176Ta	73	103			8.09	β+
779	166Tm	69	97			7.70	β+
780	256mEs	99	157			7.60	β−
781	171Er	68	103			7.52	β−
782	199Tl	81	118			7.42	β+
783	211At	85	126			7.21	β+, α (42)
784	73Se	34	39			7.15	β+
785	93mMo	42	51			6.85	IT, β+ (0.1)
786	234Pa	91	143			6.70	β−	DP
787	135I	53	82			6.57	β−
788	107Cd	48	59			6.50	β+
789	82mRb	37	45			6.47	β+, IT (<0.3)
790	153Dy	66	87			6.40	β+, α (tr)
791	127Cs	55	72			6.25	β+
792	228Ac	89	139			6.15	β−	DP
793	99mTc	43	56			6.01	IT, β− (tr)	IM
794	145Pr	59	86			5.98	β−
795	189mOs	76	113			5.81	IT
796	207Po	84	123			5.80	β+, α (0.02)
797	90Mo	42	48			5.56	β+
798	257Md	101	156			5.52	EC, α (15), SF (tr)
799	111mPd	46	65			5.50	IT, β− (27)
800	139mNd	60	79			5.50	β+, IT (12)
801	180mHf	72	108			5.47	IT, β− (0.3)
802	209At	85	124			5.41	β+, α (4.1)
803	113Ag	47	66			5.37	β−
804	156m2Tb	65	91			5.30	IT (?), β+ (?)
805	198Tl	81	117			5.30	β+
806	251Fm	100	151			5.30	β+, α (1.8)
807	138Nd	60	78			5.04	β+
808	160mHo	67	93			5.02	IT, β+ (27)
809	118mSb	51	67			5.00	β+
810	243Pu	94	149			4.96	β−
811	192Au	79	113			4.94	β+
812	110In	49	61			4.90	β+
813	133mCe	58	75			4.90	β+
814	94Tc	43	51			4.88	β+
815	85mY	39	46			4.86	β+, IT (tr)
816	73Ga	31	42			4.86	β−
817	192Hg	80	112			4.85	β+
818	132La	57	75			4.80	β+
819	99mRh	45	54			4.70	β+, IT (<0.16)
820	267Db	105	162			4.60	SF
821	179Lu	71	108			4.59	β−
822	81Rb	37	44			4.57	β+	IM
823	243Bk	97	146			4.50	β+, α (~0.15)
824	115mIn	49	66			4.49	IT, β− (5.0)
825	85mKr	36	49			4.48	β−, IT (21)
826	105Ru	44	61			4.44	β−
827	80mBr	35	45			4.42	IT
828	139Pr	59	80			4.41	β+
829	129Sb	51	78			4.40	β−
830	244Bk	97	147			4.35	β+, α (tr)
831	109In	49	60			4.20	β+
832	184Hf	72	112			4.12	β−
833	149Tb	65	84			4.12	β+, α (17)
834	110Sn	50	60			4.11	β+
835	44Sc	21	23			3.97	β+
836	71mZn	30	41			3.96	β−, IT (tr)
837	141La	57	84			3.92	β−
838	133La	57	76			3.91	β+
839	43Sc	21	22			3.89	β+
840	195mIr	77	118			3.80	β−, IT (5)
841	193Hg	80	113			3.80	β+
842	176mLu	71	105			3.66	β−, EC (0.1)
843	262Lr	103	159			3.60	SF, β+, α
844	202mPb	82	120			3.54	IT, β+ (9.5)
845	92Y	39	53			3.54	β−
846	204Po	84	120			3.53	β+, α (0.7)
847	132Ce	58	74			3.51	β+
848	150Tb	65	85			3.48	β+, α (tr)
849	117mCd	48	69			3.36	β−
850	61Cu	29	32			3.33	β+
851	209Pb	82	127			3.25	β−	DP
852	254Fm	100	154			3.24	α, SF (0.06)
853	250Bk	97	153			3.21	β−
854	161Er	68	93			3.21	β+
855	190mRe	75	115			3.20	β− (54), IT
856	90mY	39	51			3.19	IT, β− (tr)
857	191Au	79	112			3.18	β+
858	173Ta	73	100			3.14	β+
859	112Ag	47	65			3.13	β−
860	247Cf	98	149			3.11	β+, α (0.04)
861	184Ir	77	107			3.09	β+
862	190m3Ir	77	113			3.09	β+, IT (8.6)
863	45Ti	22	23			3.08	β+
864	167Ho	67	100			3.00	β−
865	264Lr	103	161			3.00	SF
866	134Sm	62	72			2.91	IT
867	239Cm	96	143			2.90	β+, α (tr)
868	197Tl	81	116			2.84	β+
869	88Kr	36	52			2.84	β−
870	38S	16	22			2.84	β−
871	87mSr	38	49			2.82	IT, EC (0.3)
872	117Sb	51	66			2.80	β+
873	224Ac	89	135			2.78	β+, α (9.4), β−(<1.6)
874	93Tc	43	50			2.75	β+
875	85Y	39	46			2.68	β+
876	150Pm	61	89			2.68	β−
877	92Sr	38	54			2.66	β−
878	256Fm	100	156			2.63	SF, α (8.1)
879	31Si	14	17			2.62	β−	CG
880	56Mn	25	31			2.58	β−
881	65Ni	28	37			2.52	β−
882	195Ir	77	118			2.50	β−
883	176W	74	102			2.50	β+
884	117Cd	48	69			2.49	β−
885	116Te	52	64			2.49	β+
886	141Nd	60	81			2.49	β+
887	161Ho	67	94			2.48	β+
888	210Rn	86	124			2.40	α (96), β+
889	198Pb	82	116			2.40	β+
890	238Cm	96	142			2.40	β+, α
891	83Br	35	48			2.40	β−
892	152Dy	66	86			2.38	β+, α (0.1)	IM
893	178mTa	73	105			2.36	β+
894	187Pt	78	109			2.35	β+
895	165Dy	66	99			2.33	β−
896	132I	53	79			2.30	β−
897	158Er	68	90			2.29	β+
898	66Ge	32	34			2.26	β+
899	129Ba	56	73			2.23	β+
900	150Sm	62	88			2.22	β+, α (tr?)
901	177W	74	103			2.20	β+
902	106mRh	45	61			2.18	β−
903	129mBa	56	73			2.16	β+, IT (tr?)
904	138mPr	59	79			2.12	β+
905	121I	53	68			2.12	β+
906	127Sn	50	77			2.10	β−
907	123Xe	54	69			2.08	β+
908	186Pt	78	108			2.08	β+, α (tr)
909	245Am	95	150			2.05	β−
910	89Nb	41	48			2.03	β+
911	195mOs	76	119			2.00	β−, IT (?)
912	117mIn	49	68			1.94	β−, IT (47)
913	186mIr	77	109			1.92	β+, IT (~25)
914	177Yb	70	107			1.91	β−
915	198mTl	81	117			1.87	β+, IT (44)
916	196Tl	81	115			1.84	β+
917	83m2Kr	36	47			1.83	IT
918	18F	9	9			1.83	β+	CG,IM
919	41Ar	18	23			1.83	β−	CG
920	163Tm	69	94			1.81	β+
921	239Pa	91	148			1.80	β−
922	201Bi	83	118			1.80	β+, α
923	207At	85	122			1.80	β+, α (~10)
924	224Rn	86	138			1.78	β−
925	80Sr	38	42			1.77	β+
926	181Os	76	105			1.75	β+
927	205Po	84	121			1.74	β+, α (0.04)
928	149Nd	60	89			1.73	β−
929	202Bi	83	119			1.72	β+, α (tr)
930	249Es	99	150			1.70	β+~, α (0.6)
931	147Tb	65	82			1.70	β+
932	87Zr	40	47			1.68	β+
933	126Ba	56	70			1.67	β+
934	113mIn	49	64			1.66	IT
935	61Co	27	34			1.65	β−
936	95Ru	44	51			1.64	β+
937	238Am	95	143			1.63	β+,α (tr)
938	208At	85	123			1.63	β+, α (0.6)
939	133Ce	58	75			1.62	β+
940	75Br	35	40			1.61	β+
941	152m5Eu	63	89			1.60	IT
942	259Md	101	158			1.60	SF, α (<1.3)
943	197mPt	78	119			1.59	IT, β− (3.3)
944	230Ra	88	142			1.55	β−
945	142La	57	85			1.52	β−
946	78As	33	45			1.51	β−
947	199Pb	82	117			1.50	β+
948	78Ge	32	46			1.47	β−
949	255Cf	98	157			1.42	β−
950	196mTl	81	115			1.41	β+, IT (3.8)
951	196mIr	77	119			1.40	β−, IT (<0.3)
952	132mI	53	79			1.39	IT, β− (14)
953	139Ba	56	83			1.38	β−
954	75Ge	32	43			1.38	β−
955	120I	53	67			1.36	β+
956	266Db	105	161			1.33	α ?, SF ?, β+ ?
957	256Md	101	155			1.28	β+, α (9.2), SF (<3)
958	137Pr	59	78			1.28	β+
959	87Kr	36	51			1.27	β−
960	164Yb	70	94			1.26	β+
961	163Er	68	95			1.25	β+
962	77Kr	36	41			1.24	β+
963	178Yb	70	108			1.23	β−
964	237Am	95	142			1.22	β+,α (0.03)
965	142Sm	62	80			1.21	β+
966	97Nb	41	56			1.20	β−
967	185Pt	78	107			1.18	β+
968	195Tl	81	114			1.16	β+
969	129Te	52	77			1.16	β−
970	104Ag	47	57			1.15	β+
971	110mIn	49	61			1.15	β+
972	174Ta	73	101			1.14	β+
973	68Ga	31	37			1.13	β+	IM
974	85mSr	38	47			1.13	IT, β+ (13)
975	190mIr	77	113			1.12	IT
976	162mHo	67	95			1.12	IT, β+ (38)
977	204m2Pb	82	122			1.12	IT
978	89mNb	41	48			1.10	β+
979	103Ag	47	56			1.10	β+
980	249Cm	96	153			1.07	β−
981	183Hf	72	111			1.07	β−
982	229Ac	89	140			1.05	β−
983	117Te	52	65			1.03	β+
984	240Np	93	147			1.03	β−	DP
985	182mHf	72	110			1.03	β−, IT (46)
986	212Bi	83	129			1.01	β−,α (36)	DP
987	116mSb	51	65			1.01	β+
988	148Tb	65	83			1.00	β+
989	270Db	105	165			1.00	α, SF, ε?

See also

• Isotope geochemistry
• List of elements by stability of isotopes
• List of radioactive nuclides by half-life
• Monoisotopic element
• Mononuclidic element
• Primordial nuclide
• Radionuclide
• Stable nuclide
• Table of nuclides

Sources

Almost all data are taken from reference. For more recent updates, see reference. These sources do not indicate whether certain heavy isotopes starting from Lr, Rf, Db, ... (etc.) were produced, observed, or only predicted from estimated data.

External links

• National Nuclear Data Center, Brookhaven National Laboratory
  • The 2016 Atomic Mass Evaluation, AMDC
• Karlsruhe Nuclide Chart, 9th edition, 2015, Joseph Magill, Gerda Pfennig, Raymond Dreher, Zsolt Sóti
• National Isotope Development Center Reference information on isotopes, and coordination and management of isotope production, availability, and distribution
• Isotope Development & Production for Research and Applications (IDPRA) U.S. Department of Energy program for isotope production and production research and development
  • Accelerator Systems and Stable Isotopes Group at ORNL
• Atomic Weights and Isotopic Compositions for All Elements U.S. National Institute of Standards and Technology
• Table of nuclides (compact, with energy per baryon) Overview picture for energy of nuclides