Physics:Isotopes of zinc
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| Standard atomic weight Ar, standard(Zn) |
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Naturally occurring zinc (30Zn) is composed of the 5 stable isotopes 64Zn, 66Zn, 67Zn, 68Zn, and 70Zn with 64Zn being the most abundant (48.6% natural abundance). Twenty-eight radioisotopes have been characterised with the most stable being 65Zn with a half-life of 243.94 days, and then 72Zn with a half-life of 46.5 hours. All of the remaining radioactive isotopes have half-lives that are less than 14 hours and the majority of these have half-lives that are less than a second. This element also has 10 meta states.
Zinc has been proposed as a "salting" material for nuclear weapons. A jacket of isotopically enriched 64Zn, irradiated by the intense high-energy neutron flux from an exploding thermonuclear weapon, would be transmuted to 65Zn, which emits 1.115 MeV of gamma radiation in about half of decays,[2] and would significantly increase the radioactivity of the weapon's fallout for several years. Such a weapon is not known to have ever been built, tested, or used.[3]
List of isotopes
| Nuclide [n 1] |
Z | N | Isotopic mass (u) [n 2][n 3] |
Half-life [n 4] |
Decay mode [n 5] |
Daughter isotope [n 6] |
Spin and parity [n 7][n 4] |
Physics:Natural abundance (mole fraction) | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Excitation energy | Normal proportion | Range of variation | ||||||||
| 54Zn | 30 | 24 | 53.99388(23)# | 2005 | 1.8(5) ms | 2p | 52Ni | 0+ | ||
| 55Zn | 30 | 25 | 54.98468(43)# | 2001 | 19.8(13) ms | β+, p (91.0%) | 54Ni | 5/2−# | ||
| β+ (9.0%) | 55Cu | |||||||||
| 56Zn | 30 | 26 | 55.97274(43)# | 2001 | 32.4(7) ms | β+, p (88.0%) | 55Ni | 0+ | ||
| β+ (12.0%) | 56Cu | |||||||||
| 57Zn | 30 | 27 | 56.96506(22)# | 1976 | 45.7(6) ms | β+, p (87%) | 56Ni | 7/2−# | ||
| β+ (13%) | 57Cu | |||||||||
| 58Zn | 30 | 28 | 57.954590(54) | 1986 | 86.0(19) ms | β+ (99.3%) | 58Cu | 0+ | ||
| β+, p (0.7%) | 57Ni | |||||||||
| 59Zn | 30 | 29 | 58.94931189(81) | 1981 | 178.7(13) ms | β+ (99.90%) | 59Cu | 3/2− | ||
| β+, p (0.10%) | 58Ni | |||||||||
| 60Zn | 30 | 30 | 59.94184132(59) | 1955 | 2.38(5) min | β+ | 60Cu | 0+ | ||
| 61Zn | 30 | 31 | 60.939507(17) | 1955 | 89.1(2) s | β+ | 61Cu | 3/2− | ||
| 62Zn | 30 | 32 | 61.93433336(66) | 1948 | 9.193(15) h | β+ | 62Cu | 0+ | ||
| 63Zn | 30 | 33 | 62.9332111(17) | 1937 | 38.47(5) min | β+ | 63Cu | 3/2− | ||
| 64Zn | 30 | 34 | 63.92914178(69) | 1922 | Observationally Stable[n 8] | 0+ | 0.4917(75) | |||
| 65Zn | 30 | 35 | 64.92924053(69) | 1939 | 243.94(4) d | EC (98.579(7)%) | 65Cu | 5/2− | ||
| β+ (1.421(7)%)[2] | ||||||||||
| 65mZn | 53.928(10) keV | 1960 | 1.6(6) μs | IT | 65Zn | 1/2− | ||||
| 66Zn | 30 | 36 | 65.92603364(80) | 1922 | Stable | 0+ | 0.2773(98) | |||
| 67Zn | 30 | 37 | 66.92712742(81) | 1928 | Stable | 5/2− | 0.0404(16) | |||
| 67m1Zn | 93.312(5) keV | 1953 | 9.15(7) μs | IT | 67Zn | 1/2− | ||||
| 67m2Zn | 604.48(5) keV | 1971 | 333(14) ns | IT | 67Zn | 9/2+ | ||||
| 68Zn | 30 | 38 | 67.92484423(84) | 1922 | Stable | 0+ | 0.1845(63) | |||
| 69Zn | 30 | 39 | 68.92655036(85) | 1937 | 56.4(9) min | β− | 69Ga | 1/2− | ||
| 69mZn | 438.636(18) keV | 1939 | 13.747(11) h | IT (99.97%) | 69Zn | 9/2+ | ||||
| β− (0.033%) | 69Ga | |||||||||
| 70Zn | 30 | 40 | 69.9253192(21) | 1922 | Observationally Stable[n 9] | 0+ | 0.0061(10) | |||
| 71Zn | 30 | 41 | 70.9277196(28) | 1955 | 2.40(5) min | β− | 71Ga | 1/2− | ||
| 71mZn | 157.7(13) keV | 1955 | 4.148(12) h | β− | 71Ga | 9/2+ | ||||
| IT? | 71Zn | |||||||||
| 72Zn | 30 | 42 | 71.9268428(23) | 1951 | 46.5(1) h | β− | 72Ga | 0+ | ||
| 73Zn | 30 | 43 | 72.9295826(20) | 1972 | 24.5(2) s | β− | 73Ga | 1/2− | ||
| 73mZn | 195.5(2) keV | 1998 | 13.0(2) ms | IT | 73Zn | 5/2+ | ||||
| 74Zn | 30 | 44 | 73.9294073(27) | 1972 | 95.6(12) s | β− | 74Ga | 0+ | ||
| 75Zn | 30 | 45 | 74.9328402(21) | 1974 | 10.2(2) s | β− | 75Ga | 7/2+ | ||
| 75mZn | 126.94(9) keV | 2011 | 5# s | β−? | 75Ga | 1/2− | ||||
| IT? | 75Zn | |||||||||
| 76Zn | 30 | 46 | 75.9331150(16) | 1974 | 5.7(3) s | β− | 76Ga | 0+ | ||
| 77Zn | 30 | 47 | 76.9368872(21) | 1977 | 2.08(5) s | β− | 77Ga | 7/2+ | ||
| 77mZn | 772.440(15) keV | 1986 | 1.05(10) s | β− (66%) | 77Ga | 1/2− | ||||
| IT (34%) | 77Zn | |||||||||
| 78Zn | 30 | 48 | 77.9382892(21) | 1977 | 1.47(15) s | β− | 78Ga | 0+ | ||
| β−, n? | 77Ga | |||||||||
| 78mZn | 2673.7(6) keV | 2000 | 320(6) ns | IT | 78Zn | (8+) | ||||
| 79Zn | 30 | 49 | 78.9426381(24) | 1986 | 746(42) ms | β− (98.3%) | 79Ga | 9/2+ | ||
| β−, n (1.7%) | 78Ga | |||||||||
| 79mZn | 942(10) keV[4] | 2015 | >200 ms | β−? | 79Ga | 1/2+ | ||||
| IT? | 79Zn | |||||||||
| 80Zn | 30 | 50 | 79.9445529(28) | 1986 | 562.2(30) ms | β− (98.64%) | 80Ga | 0+ | ||
| β−, n (1.36%) | 79Ga | |||||||||
| 81Zn | 30 | 51 | 80.9504026(54) | 1991 | 299.4(21) ms | β− (77%) | 81Ga | (1/2+, 5/2+) | ||
| β−, n (23%) | 80Ga | |||||||||
| β−, 2n? | 79Ga | |||||||||
| 82Zn | 30 | 52 | 81.9545741(33) | 1997 | 177.9(25) ms | β−, n (69%) | 81Ga | 0+ | ||
| β− (31%) | 82Ga | |||||||||
| β−, 2n? | 80Ga | |||||||||
| 83Zn | 30 | 53 | 82.96104(32)# | 1997 | 100(3) ms | β−, n (71%) | 82Ga | 3/2+# | ||
| β− (29%) | 83Ga | |||||||||
| β−, 2n? | 81Ga | |||||||||
| 84Zn | 30 | 54 | 83.96583(43)# | 2010 | 54(8) ms | β−, n (73%) | 83Ga | 0+ | ||
| β− (27%) | 84Ga | |||||||||
| β−, 2n? | 82Ga | |||||||||
| 85Zn | 30 | 55 | 84.97305(54)# | 2010 | 40# ms [>400 ns] | β−? | 85Ga | 5/2+# | ||
| β−, n? | 84Ga | |||||||||
| β−, 2n? | 83Ga | |||||||||
| 86Zn[5] | 30 | 56 | 85.97846(54)# | 2024 | β−? | 86Ga | 0+ | |||
| β−, n? | 85Ga | |||||||||
| 87Zn[5] | 30 | 57 | 2024 | |||||||
- ↑ mZn – Excited nuclear isomer.
- ↑ ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
- ↑ # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
- ↑ 4.0 4.1 # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
- ↑
Modes of decay:
IT: Isomeric transition n: Neutron emission p: Proton emission - ↑ Bold symbol as daughter – Daughter product is stable.
- ↑ ( ) spin value – Indicates spin with weak assignment arguments.
- ↑ Believed to undergo β+β+ decay to 64Ni with a half-life over 6.0×1016 y
- ↑ Believed to undergo β−β− decay to 70Ge with a half-life over 3.8×1018 y
See also
Daughter products other than zinc
References
- ↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305.
- ↑ 2.0 2.1 "65Zn ε decay". NNDC Chart of Nuclides. https://www.nndc.bnl.gov/ensnds/65/Cu/ec_decay.pdf.
- ↑ D. T. Win, M. Al Masum (2003). "Weapons of Mass Destruction". Assumption University Journal of Technology 6 (4): 199–219. http://www.journal.au.edu/au_techno/2003/apr2003/aujt6-4_article07.pdf. Retrieved 2015-09-24.
- ↑ Nies, L.; Canete, L.; Dao, D. D.; Giraud, S.; Kankainen, A.; Lunney, D.; Nowacki, F.; Bastin, B. et al. (30 November 2023). "Further Evidence for Shape Coexistence in Zn 79 m near Doubly Magic Ni 78". Physical Review Letters 131 (22). doi:10.1103/PhysRevLett.131.222503. PMID 38101393.
- ↑ 5.0 5.1 Shimizu, Y.; Kubo, T.; Sumikama, T.; Fukuda, N.; Takeda, H.; Suzuki, H.; Ahn, D. S.; Inabe, N. et al. (8 April 2024). "Production of new neutron-rich isotopes near the N = 60 isotones Ge 92 and As 93 by in-flight fission of a 345 MeV/nucleon U 238 beam". Physical Review C 109 (4). doi:10.1103/PhysRevC.109.044313.
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