主要的砷同位素
標準原子質量 (A r, 標準 ) 7001749215950000000♠ 74.921595 (6)[ 1]
砷 (原子量 :74.921595(6))共有43個同位素 ,其中有1個同位素是穩定 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] [ n 4]
原子核 自旋 [ n 1]
相對豐度 (莫耳 分率)
激發能量[ n 1] [ n 2]
60 As
33
27
59.99313(64)#
p
59 Ge
5+#
61 As
33
28
60.98062(64)#
p
60 Ge
3/2-#
62 As
33
29
61.97320(32)#
p
61 Ge
1+#
63 As
33
30
62.96369(54)#
p
62 Ge
(3/2-)#
64 As
33
31
63.95757(38)#
40(30) ms [18(+43-7) ms]
β+
64 Ge
0+#
65 As
33
32
64.94956(32)#
170(30) ms
β+
65 Ge
3/2-#
66 As
33
33
65.94471(73)
95.77(23) ms
β+
66 Ge
(0+)
66m1 As
1356.70(17) keV
1.1(1) µs
(5+)
66m2 As
3023.9(3) keV
8.2(5) µs
(9+)
67 As
33
34
66.93919(11)
42.5(12) s
β+
67 Ge
(5/2-)
68 As
33
35
67.93677(5)
151.6(8) s
β+
68 Ge
3+
68m As
425.21(16) keV
111(20) ns [?107(+23-16) ns]
1+
69 As
33
36
68.93227(3)
15.2(2) min
β+
69 Ge
5/2-
70 As
33
37
69.93092(5)
52.6(3) min
β+
70 Ge
4(+#)
70m As
32.008(23) keV
96(3) µs
2(+)
71 As
33
38
70.927112(5)
65.28(15) h
β+
71 Ge
5/2-
72 As
33
39
71.926752(5)
26.0(1) h
β+
72 Ge
2-
73 As
33
40
72.923825(4)
80.30(6) d
ε
73 Ge
3/2-
74 As
33
41
73.9239287(25)
17.77(2) d
β+ (66%)
74 Ge
2-
β− (34%)
74 Se
75 As
33
42
74.9215965(20)
稳定
3/2-
1.0000
75m As
303.9241(7) keV
17.62(23) ms
9/2+
76 As
33
43
75.922394(2)
1.0942(7) d
β− (99.98%)
76 Se
2-
ε (.02%)
76 Ge
76m As
44.425(1) keV
1.84(6) µs
(1)+
77 As
33
44
76.9206473(25)
38.83(5) h
β−
77m Se
3/2-
77m As
475.443(16) keV
114.0(25) µs
9/2+
78 As
33
45
77.921827(11)
90.7(2) min
β−
78 Se
2-
79 As
33
46
78.920948(6)
9.01(15) min
β−
79m Se
3/2-
79m As
772.81(6) keV
1.21(1) µs
(9/2)+
80 As
33
47
79.922534(25)
15.2(2) s
β−
80 Se
1+
81 As
33
48
80.922132(6)
33.3(8) s
β−
81m Se
3/2-
82 As
33
49
81.92450(21)
19.1(5) s
β−
82 Se
(1+)
82m As
250(200) keV
13.6(4) s
β−
82 Se
(5-)
83 As
33
50
82.92498(24)
13.4(3) s
β−
83m Se
3/2-#
84 As
33
51
83.92906(32)#
4.02(3) s
β− (99.721%)
84 Se
(3)(+#)
β− , n (.029%)
83 Se
84m As
0(100)# keV
650(150) ms
85 As
33
52
84.93202(21)#
2.021(10) s
β− , n (59.4%)
84 Se
(3/2-)#
β− (40.6%)
85 Se
86 As
33
53
85.93650(32)#
0.945(8) s
β− (67%)
86 Se
β− , n (33%)
85 Se
87 As
33
54
86.93990(32)#
0.56(8) s
β− (84.6%)
87 Se
3/2-#
β− , n (15.4%)
86 Se
88 As
33
55
87.94494(54)#
300# ms [>300 ns]
β−
88 Se
β− , n
87 Se
89 As
33
56
88.94939(54)#
200# ms [>300 ns]
β−
89 Se
3/2-#
90 As
33
57
89.95550(86)#
80# ms [>300 ns]
91 As
33
58
90.96043(97)#
50# ms [>300 ns]
3/2-#
92 As
33
59
91.96680(97)#
30# ms [>300 ns]
^ 1.0 1.1 1.2 1.3 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。
^ 半衰期超过5亿年的衰变产物以粗斜体 表示。
参考文獻
^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. Standard atomic weights of the elements 2021 (IUPAC Technical Report) . Pure and Applied Chemistry. 2022-05-04. ISSN 1365-3075 . doi:10.1515/pac-2019-0603 (英语) .
^ 存档副本 . [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).
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.
穩定9個
穩定6個
穩定5個
穩定4個
穩定3個
穩定2個
穩定1個
1億年〜
1万年〜
10年〜
100日〜
1日〜
1時〜
10分〜
1分〜
10秒〜
1秒〜
不到1秒
幻數
穩定9個
穩定6個
穩定5個
穩定4個
穩定3個
穩定2個
穩定1個
1億年〜
1万年〜
10年〜
100日〜
1日〜
1時〜
10分〜
1分〜
10秒〜
1秒〜
不到1秒
幻數