氪的同位素

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。

**圖表**
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 2.6 1.3 y
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)
Stable
0+
0.02286(10)
81Kr
36
45
80.9165920(21)
2.29(11)×105 a
EC
81Br
7/2+
trace
81mKr
190.62(4) keV
13.10(3) s
IT (99.975%)
81Kr
1/2-
EC (.025%)
81Br
82Kr
36
46
81.9134836(19)
Stable
0+
0.11593(31)
83Kr
36
47
82.914136(3)
Stable
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-
link=yes
36
48
83.911507(3)
Stable
0+
0.56987(15)
84mKr
3236.02(18) keV
1.89(4) µs
8+
氪-85|85
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) µs1.2(+10-4) µs
(17/2+)
86Kr
36
50
85.91061073(11)
觀測上穩定
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

**參考文獻**
 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) date=20110324090740 . Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and  Atomic Weights Revised (2005) date=20080305062433 .- 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 date=20110716114059 , Nuc. Phys. A 729, pp. 3-128 (2003).
** National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the  NuDat 2.1 database date=20180714022824  (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.