Isotopes of Krypton - Table

Table

nuclide
symbol		 Z(p) N(n)
isotopic mass (u)
 half-life decay
mode(s)		 daughter
isotope(s)		 nuclear
spin		 representative
isotopic
composition
(mole fraction)		 range of natural
variation
(mole fraction)
excitation energy
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) Observationally Stable 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+
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-
84Kr 36 48 83.911507(3) Stable 0+ 0.56987(15)
84mKr 3236.02(18) keV 1.89(4) µs 8+
85Kr 36 49 84.9125273(21) 10.776(3) a β- 85Rb 9/2+
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
 (17/2+)
86Kr 36 50 85.91061073(11) Observationally Stable 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
 0+
101Kr 36 65 unknown >635 ns β- 2n, β- n, β- (in order of decay mode) 99Rb, 100Rb, 101Rb unknown

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