氬的同位素

主要的氬同位素
標準原子質量（英语：Standard atomic weight） (Ar, 標準)	39.948(1);
←Cl（17）	K（19）→
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氬（原子量：39.948(1)）共有25個同位素，其中有3個是穩定的。

圖表

符號	Z	N	同位素質量（u） ^{[n 1]}^{[n 2]}	半衰期 ^{[n 1]}^{[n 2]}	衰變方式^[2]	衰變產物 ^{[n 3]}	原子核自旋^{[n 1]}	相對豐度（莫耳分率）^{[n 2]}
²⁹Ar^[3]	18	11	29.04076(47)#		2p	²⁷S	5/2+#
³⁰Ar	18	12	30.02156(32)#	<20 ns	p	²⁹Cl	0+
³¹Ar	18	13	31.01212(22)#	14.4(6) ms	β⁺, p (55.0%)	³⁰S	5/2(+#)
					β⁺ (40.4%)	³¹Cl
					β⁺, 2p (2.48%)	²⁹P
					β⁺, 3p (2.1%)	²⁸Si
³²Ar	18	14	31.9976380(19)	98(2) ms	β⁺ (56.99%)	³²Cl	0+
³²Ar	18	14	31.9976380(19)	98(2) ms	β⁺, p (43.01%)	³¹S	0+
³³Ar	18	15	32.9899257(5)	173.0(20) ms	β⁺ (61.35%)	³³Cl	1/2+
³³Ar	18	15	32.9899257(5)	173.0(20) ms	β⁺, p (38.65%)	³²S	1/2+
³⁴Ar	18	16	33.9802712(4)	844.5(34) ms	β⁺	³⁴Cl	0+
³⁵Ar	18	17	34.9752576(8)	1.775(4) s	β⁺	³⁵Cl	3/2+
³⁶Ar	18	18	35.967545106(29)	觀測上穩定^{[n 4]}			0+	0.003336(4)
³⁷Ar	18	19	36.96677632(22)	35.04(4) d	ε	³⁷Cl	3/2+
³⁸Ar	18	20	37.9627324(4)	稳定			0+	6.29(1)×10⁻⁴
³⁹Ar^{[n 5]}	18	21	38.964313(5)	269(3) y	β⁻	³⁹K	7/2−	痕量^{[n 6]}
40 Ar ^{[n 7]}	18	22	39.9623831225(29)	穩定			0+	0.996035(4)^{[n 8]}
⁴¹Ar	18	23	40.9645006(4)	109.61(4) min	β⁻	⁴¹K	7/2−	痕量
⁴²Ar	18	24	41.963046(6)	32.9(11) y	β⁻	⁴²K	0+
⁴³Ar	18	25	42.965636(6)	5.37(6) min	β⁻	⁴³K	(5/2−)
⁴⁴Ar	18	26	43.9649240(17)	11.87(5) min	β⁻	⁴⁴K	0+
⁴⁵Ar	18	27	44.9680400(6)	21.48(15) s	β⁻	⁴⁵K	(1/2,3/2,5/2)−
⁴⁶Ar	18	28	45.96809(4)	8.4(6) s	β⁻	⁴⁶K	0+
⁴⁷Ar	18	29	46.97219(11)	1.23(3) s	β⁻ (99%)	⁴⁷K	3/2−#
⁴⁷Ar	18	29	46.97219(11)	1.23(3) s	β⁻, n (1%)	⁴⁶K	3/2−#
⁴⁸Ar	18	30	47.97454(32)#	0.48(40) s	β⁻	⁴⁸K	0+
⁴⁹Ar	18	31	48.98052(54)#	170(50) ms	β⁻	⁴⁹K	3/2−#
⁵⁰Ar	18	32	49.98443(75)#	85(30) ms	β⁻	⁵⁰K	0+
⁵¹Ar	18	33	50.99163(75)#	60# ms [>200 ns]	β⁻	⁵¹K	3/2−#
⁵²Ar	18	34	51.99678(97)#	10# ms	β⁻	⁵²K	0+
⁵³Ar	18	35	53.00494(107)#	3# ms	β⁻	⁵³K	(5/2−)#
⁵³Ar	18	35	53.00494(107)#	3# ms	β⁻, n	⁵²K	(5/2−)#

^ ^1.0 ^1.1 ^1.2 畫上#號的數據代表沒有經過實驗的証明，僅為理論推測。
^ ^2.0 ^2.1 ^2.2 用括號括起來的數據代表不確定性。
^ 穩定的衰變產物以粗體表示。
^ Believed to undergo double electron capture to ³⁶S (lightest theoretically unstable nuclide for which no evidence of radioactivity has been observed)
^ Used in argon-argon dating（英语：argon-argon dating）
^ Cosmogenic nuclide（英语：Cosmogenic nuclide）
^ 用于氬－氬年代測定法（英语：argon-argon dating）和鉀－氬年代測定法中
^ Generated from ⁴⁰K in rocks. These ratios are terrestrial. Cosmic abundance is far less than ³⁶Ar.

←	同位素列表	→
氯的同位素	氬的同位素	鉀的同位素

参考文獻

^ Meija, Juris; et al. Atomic weights of the elements 2013 (IUPAC Technical Report). Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
^ Universal Nuclide Chart. Nucleonica. [2012-08-15]. （原始内容存档于2017-02-19）.
^ Mukha, I.; et al. Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains. Physical Review C. 2018, 98 (6): 064308–1–064308–13. Bibcode:2018PhRvC..98f4308M. S2CID 119384311. arXiv:1803.10951 . doi:10.1103/PhysRevC.98.064308.

Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report) （页面存档备份，存于互联网档案馆）. Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) （页面存档备份，存于互联网档案馆）.
Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties （页面存档备份，存于互联网档案馆）, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database （页面存档备份，存于互联网档案馆） (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.

[hash-2] 1.0 ^1.1 ^1.2 畫上#號的數據代表沒有經過實驗的証明，僅為理論推測。

[brackets-3] 2.0 ^2.1 ^2.2 用括號括起來的數據代表不確定性。

[5] 穩定的衰變產物以粗體表示。

[7] Believed to undergo double electron capture to ³⁶S (lightest theoretically unstable nuclide for which no evidence of radioactivity has been observed)

[8] Used in argon-argon dating（英语：argon-argon dating）

[c-9] Cosmogenic nuclide（英语：Cosmogenic nuclide）

[10] 用于氬－氬年代測定法（英语：argon-argon dating）和鉀－氬年代測定法中

[11] Generated from ⁴⁰K in rocks. These ratios are terrestrial. Cosmic abundance is far less than ³⁶Ar.

[CIAAW2013-1] Meija, Juris; et al. Atomic weights of the elements 2013 (IUPAC Technical Report). Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.

[4] Universal Nuclide Chart. Nucleonica. [2012-08-15]. （原始内容存档于2017-02-19）.

[p-excursion-6] Mukha, I.; et al. Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains. Physical Review C. 2018, 98 (6): 064308–1–064308–13. Bibcode:2018PhRvC..98f4308M. S2CID 119384311. arXiv:1803.10951 . doi:10.1103/PhysRevC.98.064308.

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