砷的同位素

**主要的砷同位素**
γ	–
β+	74Ge
γ	–
β−	74Se
標準原子質量 (Ar, 標準)	74.921595(6)[1];
←Ge（32）	Se（34）→

砷（原子量：74.92160(2)）共有43個同位素，其中有個1同位素是穩定的。

圖表

符號	Z（p ）	N（n ）	同位素質量（u）	半衰期	衰變方式[2]	衰變產物[n 1]	原子核自旋	相對豐度（莫耳分率）	相對豐度的變化量（莫耳分率）
符號	激發能量			半衰期	衰變方式[2]	衰變產物[n 1]	原子核自旋	相對豐度（莫耳分率）	相對豐度的變化量（莫耳分率）
⁶⁰As	33	27	59.99313(64)#		p	⁵⁹Ge	5+#
⁶¹As	33	28	60.98062(64)#		p	⁶⁰Ge	3/2-#
⁶²As	33	29	61.97320(32)#		p	⁶¹Ge	1+#
⁶³As	33	30	62.96369(54)#		p	⁶²Ge	(3/2-)#
⁶⁴As	33	31	63.95757(38)#	40(30) ms [18(+43-7) ms]	β⁺	⁶⁴Ge	0+#
⁶⁵As	33	32	64.94956(32)#	170(30) ms	β⁺	⁶⁵Ge	3/2-#
⁶⁶As	33	33	65.94471(73)	95.77(23) ms	β⁺	⁶⁶Ge	(0+)
^66m1As	1356.70(17) keV			1.1(1) µs			(5+)
^66m2As	3023.9(3) keV			8.2(5) µs			(9+)
⁶⁷As	33	34	66.93919(11)	42.5(12) s	β⁺	⁶⁷Ge	(5/2-)
⁶⁸As	33	35	67.93677(5)	151.6(8) s	β⁺	⁶⁸Ge	3+
^68mAs	425.21(16) keV			111(20) ns [?107(+23-16) ns]			1+
⁶⁹As	33	36	68.93227(3)	15.2(2) min	β⁺	⁶⁹Ge	5/2-
⁷⁰As	33	37	69.93092(5)	52.6(3) min	β⁺	⁷⁰Ge	4(+#)
^70mAs	32.008(23) keV			96(3) µs			2(+)
⁷¹As	33	38	70.927112(5)	65.28(15) h	β⁺	⁷¹Ge	5/2-
⁷²As	33	39	71.926752(5)	26.0(1) h	β⁺	⁷²Ge	2-
⁷³As	33	40	72.923825(4)	80.30(6) d	ε	⁷³Ge	3/2-
⁷⁴As	33	41	73.9239287(25)	17.77(2) d	β⁺ (66%)	⁷⁴Ge	2-
⁷⁴As	33	41	73.9239287(25)	17.77(2) d	β⁻ (34%)	⁷⁴Se	2-
75 As	33	42	74.9215965(20)	稳定			3/2-	1.0000
^75mAs	303.9241(7) keV			17.62(23) ms			9/2+
⁷⁶As	33	43	75.922394(2)	1.0942(7) d	β⁻ (99.98%)	⁷⁶Se	2-
⁷⁶As	33	43	75.922394(2)	1.0942(7) d	ε (.02%)	⁷⁶Ge	2-
^76mAs	44.425(1) keV			1.84(6) µs			(1)+
⁷⁷As	33	44	76.9206473(25)	38.83(5) h	β⁻	^77mSe	3/2-
^77mAs	475.443(16) keV			114.0(25) µs			9/2+
⁷⁸As	33	45	77.921827(11)	90.7(2) min	β⁻	⁷⁸Se	2-
⁷⁹As	33	46	78.920948(6)	9.01(15) min	β⁻	^79mSe	3/2-
^79mAs	772.81(6) keV			1.21(1) µs			(9/2)+
⁸⁰As	33	47	79.922534(25)	15.2(2) s	β⁻	⁸⁰Se	1+
⁸¹As	33	48	80.922132(6)	33.3(8) s	β⁻	^81mSe	3/2-
⁸²As	33	49	81.92450(21)	19.1(5) s	β⁻	⁸²Se	(1+)
^82mAs	250(200) keV			13.6(4) s	β⁻	⁸²Se	(5-)
⁸³As	33	50	82.92498(24)	13.4(3) s	β⁻	^83mSe	3/2-#
⁸⁴As	33	51	83.92906(32)#	4.02(3) s	β⁻ (99.721%)	⁸⁴Se	(3)(+#)
⁸⁴As	33	51	83.92906(32)#	4.02(3) s	β⁻, n (.029%)	⁸³Se	(3)(+#)
^84mAs	0(100)# keV			650(150) ms
⁸⁵As	33	52	84.93202(21)#	2.021(10) s	β⁻, n (59.4%)	⁸⁴Se	(3/2-)#
⁸⁵As	33	52	84.93202(21)#	2.021(10) s	β⁻ (40.6%)	⁸⁵Se	(3/2-)#
⁸⁶As	33	53	85.93650(32)#	0.945(8) s	β⁻ (67%)	⁸⁶Se
⁸⁶As	33	53	85.93650(32)#	0.945(8) s	β⁻, n (33%)	⁸⁵Se
⁸⁷As	33	54	86.93990(32)#	0.56(8) s	β⁻ (84.6%)	⁸⁷Se	3/2-#
⁸⁷As	33	54	86.93990(32)#	0.56(8) s	β⁻, n (15.4%)	⁸⁶Se	3/2-#
⁸⁸As	33	55	87.94494(54)#	300# ms [>300 ns]	β⁻	⁸⁸Se
⁸⁸As	33	55	87.94494(54)#	300# ms [>300 ns]	β⁻, n	⁸⁷Se
⁸⁹As	33	56	88.94939(54)#	200# ms [>300 ns]	β⁻	⁸⁹Se	3/2-#
⁹⁰As	33	57	89.95550(86)#	80# ms [>300 ns]
⁹¹As	33	58	90.96043(97)#	50# ms [>300 ns]			3/2-#
⁹²As	33	59	91.96680(97)#	30# ms [>300 ns]

備註：畫上#號的數據代表沒有經過實驗的証明，只是理論推測而已，而用括號括起來的代表數據不確定性。

←	同位素列表	→
鍺的同位素	砷的同位素	硒的同位素

註釋

Bold for stable isotopes, bold italic for nearly-stable isotopes (half-life longer than the age of the universe)

参考文獻

Meija, Juris; 等. . Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.
. [2015-09-13]. （原始内容存档于2017-02-19）.

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. Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) 页面存档备份，存于.
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, 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 (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.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[3] Bold for stable isotopes, bold italic for nearly-stable isotopes (half-life longer than the age of the universe)

[CIAAW2013-1] Meija, Juris; 等. . Pure and Applied Chemistry. 2016, 88 (3): 265–91. doi:10.1515/pac-2015-0305.

[2] . [2015-09-13]. （原始内容存档于2017-02-19）.