氪（原子量：83.798(2)）共有40個同位素，其中有5個同位素是穩定的。
Quick Facts 同位素, 衰變 ...
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More information 符號, Z ...
| 符號
|
Z
|
N
|
同位素質量（u）
[n 1][n 2]
|
半衰期
[n 1][n 2][n 3]
|
衰變
方式[3]
|
衰變
產物
[n 4][n 5]
|
原子核
自旋[n 1]
|
相對豐度
（莫耳分率）[n 2]
|
相對豐度
的變化量
（莫耳分率）
|
| 激發能量[n 2]
|
| 69Kr
|
36
|
33
|
68.96518(43)#
|
32(10) ms
|
β+
|
69Br
|
5/2-#
|
|
|
| 70Kr
|
36
|
34
|
69.95526(41)#
|
52(17) ms
|
β+
|
70Br
|
0+
|
|
|
| 71Kr
|
36
|
35
|
70.94963(70)
|
100(3) ms
|
β+ (94.8%)
|
71Br
|
(5/2)-
|
|
|
| β+, p (5.2%)
|
70Se
|
| 72Kr
|
36
|
36
|
71.942092(9)
|
17.16(18) s
|
β+
|
72Br
|
0+
|
|
|
| 73Kr
|
36
|
37
|
72.939289(7)
|
28.6(6) s
|
β+ (99.32%)
|
73Br
|
3/2-
|
|
|
| β+, p (.68%)
|
72Se
|
| 73mKr
|
433.66(12) keV
|
107(10) ns
|
|
|
(9/2+)
|
|
|
| 74Kr
|
36
|
38
|
73.9330844(22)
|
11.50(11) min
|
β+
|
74Br
|
0+
|
|
|
| 75Kr
|
36
|
39
|
74.930946(9)
|
4.29(17) min
|
β+
|
75Br
|
5/2+
|
|
|
| 76Kr
|
36
|
40
|
75.925910(4)
|
14.8(1) h
|
β+
|
76Br
|
0+
|
|
|
| 77Kr
|
36
|
41
|
76.9246700(21)
|
74.4(6) min
|
β+
|
77Br
|
5/2+
|
|
|
| 78Kr
|
36
|
42
|
77.9203648(12)
|
9.2 +5.5
−2.6 +1.3
−×1021 y[1]
|
雙電子捕獲
|
78Se
|
0+
|
0.00355(3)
|
|
| 79Kr
|
36
|
43
|
78.920082(4)
|
35.04(10) h
|
β+
|
79Br
|
1/2-
|
|
|
| 79mKr
|
129.77(5) keV
|
50(3) s
|
|
|
7/2+
|
|
|
| 80Kr
|
36
|
44
|
79.9163790(16)
|
穩定
|
0+
|
0.02286(10)
|
|
| 81Kr[n 6]
|
36
|
45
|
80.9165920(21)
|
2.29(11)×105 a
|
ε
|
81Br
|
7/2+
|
trace
|
|
| 81mKr
|
190.62(4) keV
|
13.10(3) s
|
IT (99.975%)
|
81Kr
|
1/2-
|
|
|
| ε (.025%)
|
81Br
|
| 82Kr
|
36
|
46
|
81.9134836(19)
|
穩定
|
0+
|
0.11593(31)
|
|
| 83Kr[n 7]
|
36
|
47
|
82.914136(3)
|
穩定
|
9/2+
|
0.11500(19)
|
|
| 83m1Kr
|
9.4053(8) keV
|
154.4(11) ns
|
|
|
7/2+
|
|
|
| 83m2Kr
|
41.5569(10) keV
|
1.83(2) h
|
IT
|
83Kr
|
1/2-
|
|
|
84
Kr
[n 7]
|
36
|
48
|
83.911507(3)
|
穩定
|
0+
|
0.56987(15)
|
|
| 84mKr
|
3236.02(18) keV
|
1.89(4) µs
|
|
|
8+
|
|
|
85
Kr
[n 7]
|
36
|
49
|
84.9125273(21)
|
10.776(3) a
|
β−
|
85Rb
|
9/2+
|
trace
|
|
| 85m1Kr
|
304.871(20) keV
|
4.480(8) h
|
β− (78.6%)
|
85Rb
|
1/2-
|
|
|
| IT (21.4%)
|
85Kr
|
| 85m2Kr
|
1991.8(13) keV
|
1.6(7) µs
[1.2(+10-4) µs]
|
|
|
(17/2+)
|
|
|
| 86Kr[n 8][n 7]
|
36
|
50
|
85.91061073(11)
|
觀測上穩定[n 9]
|
0+
|
0.17279(41)
|
|
| 87Kr
|
36
|
51
|
86.91335486(29)
|
76.3(5) min
|
β−
|
87Rb
|
5/2+
|
|
|
| 88Kr
|
36
|
52
|
87.914447(14)
|
2.84(3) h
|
β−
|
88Rb
|
0+
|
|
|
| 89Kr
|
36
|
53
|
88.91763(6)
|
3.15(4) min
|
β−
|
89Rb
|
3/2(+#)
|
|
|
| 90Kr
|
36
|
54
|
89.919517(20)
|
32.32(9) s
|
β−
|
90mRb
|
0+
|
|
|
| 91Kr
|
36
|
55
|
90.92345(6)
|
8.57(4) s
|
β−
|
91Rb
|
5/2(+)
|
|
|
| 92Kr
|
36
|
56
|
91.926156(13)
|
1.840(8) s
|
β− (99.96%)
|
92Rb
|
0+
|
|
|
| β−, n (.033%)
|
91Rb
|
| 93Kr
|
36
|
57
|
92.93127(11)
|
1.286(10) s
|
β− (98.05%)
|
93Rb
|
1/2+
|
|
|
| β−, n (1.95%)
|
92Rb
|
| 94Kr
|
36
|
58
|
93.93436(32)#
|
210(4) ms
|
β− (94.3%)
|
94Rb
|
0+
|
|
|
| β−, n (5.7%)
|
93Rb
|
| 95Kr
|
36
|
59
|
94.93984(43)#
|
114(3) ms
|
β−
|
95Rb
|
1/2(+)
|
|
|
| 96Kr
|
36
|
60
|
95.94307(54)#
|
80(7) ms
|
β−
|
96Rb
|
0+
|
|
|
| 97Kr
|
36
|
61
|
96.94856(54)#
|
63(4) ms
|
β−
|
97Rb
|
3/2+#
|
|
|
| β−, n
|
96Rb
|
| 98Kr
|
36
|
62
|
97.95191(64)#
|
46(8) ms
|
|
|
0+
|
|
|
| 99Kr
|
36
|
63
|
98.95760(64)#
|
40(11) ms
|
|
|
(3/2+)#
|
|
|
| 100Kr
|
36
|
64
|
99.96114(54)#
|
10# ms
[>300 ns]
|
|
|
0+
|
|
|
| 101Kr
|
36
|
65
|
unknown
|
>635 ns
|
β−, 2n
|
99Rb
|
unknown
|
|
|
| β−, n
|
100Rb
|
| β−
|
101Rb
|
Close
畫上#號的數據代表沒有經過實驗的証明，僅為理論推測。
存档副本. [2015-09-13]. （原始內容存檔於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) （頁面存檔備份，存於互聯網檔案館）. Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) （頁面存檔備份，存於互聯網檔案館）.
- 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 （頁面存檔備份，存於互聯網檔案館）, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database （頁面存檔備份，存於互聯網檔案館） (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.
