Physics:Isotopes of neon

Short description: Nuclides with atomic number of 10 but with different mass numbers

The abundances of the naturally occurring isotopes of neon

Neon (₁₀Ne) possesses three stable isotopes: , , and . In addition, 17 radioactive isotopes have been discovered, ranging from to , all short-lived. The longest-lived is with a half-life of 3.38(2) min. All others are under a minute, most under a second. The least stable is with a half-life of 770(300) ys (7.7(3.0)×10⁻²² s). See isotopes of carbon for notes about the measurement. Light radioactive neon isotopes usually decay to fluorine or oxygen, while heavier ones decay to sodium.

List of isotopes

Nuclide	Z	N	Isotopic mass (u)	Half-life [resonance width]	Decay mode	Daughter isotope	Spin and parity	Physics:Natural abundance (mole fraction)
	Excitation energy							Normal proportion	Range of variation
	10	5	15.043170(70)	770(300) ys [590(230) keV]	2p		(3/2−)
	10	6	16.025751(22)	> 5.7 zs [< 80 keV]	2p		0+
	10	7	17.0177140(4)	109.2(6) ms	β+p (94.4(2.9)%)		1/2−
					β+α (3.51(1)%)
					β+ (2.1(2.9)%)
					β+pα (0.014(4)%)
	10	8	18.0057087(4)	1664.20(47) ms	β+		0+
	10	9	19.00188091(17)	17.2569(19) s	β+		1/2+
	10	10	19.9924401753(16)	Stable			0+	0.9048(3)	[0.8847, 0.9051]
	10	11	20.99384669(4)	Stable			3/2+	0.0027(1)	[0.0027, 0.0171]
	10	12	21.991385114(19)	Stable			0+	0.0925(3)	[0.0920, 0.0996]
	10	13	22.99446691(11)	37.15(3) s	β−		5/2+
	10	14	23.9936106(6)	3.38(2) min	β−		0+
	10	15	24.997810(30)	602(8) ms	β−		1/2+
	10	16	26.000516(20)	197(2) ms	β− (99.87(3)%)		0+
					β−n (0.13(3)%)
	10	17	27.007570(100)	30.9(1.1) ms	β− (98.0(5)%)		(3/2+)
					β−n (2.0(5)%)
					β−2n ?	?
	10	18	28.012130(140)	18.8(2) ms	β− (84.3(1.1)%)		0+
					β−n (12(1)%)
					β−2n (3.7(5)%)
	10	19	29.019750(160)	14.7(4) ms	β− (68.0(5.1)%)		(3/2−)
					β−n (28(5)%)
					β−2n (4(1)%)
	10	20	30.024990(270)	7.22(18) ms	β− (78.1(4.6)%)		0+
					β−n (13(4)%)
					β−2n (8.9(2.3)%)
	10	21	31.033470(290)	3.4(8) ms	β−		(3/2−)
					β−n ?	?
					β−2n ?	?
	10	22	32.039720(540)#	3.5(9) ms	β−		0+
					β−n ?	?
					β−2n ?	?
?	10	23	33.049520(640)#	< 260 ns	n ?		7/2−#
	10	24	34.056730(550)#	2 ms# [> 1.5 μs]	β− ?		0+
					β−2n ?	?
					β−n ?	?

• The isotopic composition refers to that in air.