List of isotopes / atomic number 31 to atomic number 40

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The list of isotopes is the overview page for easy access to all elements. The structure is also explained there and the legend for the table can also be found there. Decay energies were recalculated with the given masses and the mass-energy equivalent of . ${\displaystyle \textstyle \Delta m=931{,}4940954{\frac {\mathrm {MeV} }{\mathrm {u} }}}$

₃₁ gallium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
56 Ga		3.311		p = 100?		55.995 36 (64 #)
57 Ga		2.641		p = 100?		56.983 20 (32 #)
58 Ga		1.765		p = 100?		57.974 78 (21 #)
59 Ga	<43 ns	1.038		p = 100?		58.963 53 (18 #)
60 Ga	70 ms	14.39 (ε), 9.285 (β + p), 11.698 (β + α)	2+	ε = 98.4, β + p = 1.6, β + α = 2.5 · 10 −3		59,957 29 (21 #)
61 Ga	167 ms	9.214	3 / 2−	ε		60.949 399 (41)
62 Ga	116.121 ms	9.181	0+	ε		61.944 190 25 (75)
63 Ga	32.4 s	5.666	3 / 2−	ε		62.939 2942 (14)
64 Ga	2.627 min	7.171	0+	ε		63.936 8404 (15)
64m1 Ga	21.9 µs	0.04169	2+	IT		63.936 885 16
65 Ga	15.2 min	3.255	3 / 2−	ε		64.932 734 59 (88)
66 Ga	9.49 h	5.175	0+	ε		65.931 5894 (34)
67 Ga	3.2617 d	1.001	3 / 2−	ε		66.928 2025 (13)
68 Ga	67.71 min	2.921	1+	ε		67.927 9805 (16)
69 Ga	stable		3 / 2−		060.108	68.925 5735 (13)
70 Ga	21.14 min	1.652 (β - ), 0.65456 (ε)	1+	β - = 99.59, ε = 0.41		69.926 0219 (13)
71 Ga	stable		3 / 2−		039.892	70.924 702 58 (87)
72 Ga	14.1 h	3,998	3−	β -		71.926 367 47 (88)
72m1 Ga	39.68 ms	0.11856	0+	IT		71.926 494 75
73 Ga	4.86 h	1,598	3 / 2−	β -		72.925 1747 (18)
74 Ga	8.12 min	5.373	3−	β -		73.926 9457 (32)
74m1 Ga	9.5 s	0.06004 (IT), 5.433 (β - )	0	IT = 75, β - = 25		73.927 010 16
75 Ga	126 s	3,392	3 / 2−	β -		74.926 5002 (26)
76 Ga	32.6 s	6,916	3+	β -		75.928 8276 (21)
77 Ga	13.2 s	5.221	3 / 2−	β -		76.929 1543 (26)
78 Ga	5.09 s	8.156	3+	β -		77.931 6088 (20)
79 Ga	2.847 s	6.979 (β - ), 1.243 (β - n)	3 / 2−	β - = 99.91, β - n = 0.09		78.932 8523 (20)
80 Ga	1.676 s	10.312 (β - ), 2.232 (β - n)	3	β - = 99.14, β - n = 0.86		79.936 4208 (31)
81 Ga	1.217 s	8.664 (β - ), 3.836 (β - n)	5 / 2−	β - = 88.1, β - n = 11.9		80.938 1338 (35)
82 Ga	0.599 s	12.484 (β - ), 5.29 (β - n)	3+	β - = 80.2, β - n = 19.8		81.943 1765 (26)
83 Ga	308.1 ms	11.719 (β - ), 8.087 (β - n)	3 / 2−	β - = 37.2, β - n = 62.8		82.947 1203 (28)
84 Ga	85 ms	13.865 (β - ), 8.622 (β - n)	0	β - = 26, β - n = 74		83,952 46 (43 #)
85 Ga	92 ms	13.06 (β - ), 10.014 (β - n)	3 / 2−	β - <65, β - n> 35		84.956 99 (32 #)
86 Ga	43 ms	15.305 (β - ), 10.961 (β - n)		β - =?, β - n =?		85.963 01 (75 #)
87 Ga	> 634 ns	14.494 (β - ), 12.105 (β - n), 7.397 (β - 2n)		β - =?, β - n =?, β - 2n =?		86.968 24 (86 #)

₃₂ germanium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
58 Ge		3.288	0	2p = 100?		57.991 72 (43 #)
59 Ge	> 360 ns	1.658	3 / 2−	2p = 100?		58.982 49 (32 #)
60 Ge	30 ms	12.175 (ε), 12.317 (εp)	0+	ε =?, εp =?		59.970 36 (21 #)
61 Ge	44 ms	13.405 (ε), 13.155 (εp)	3 / 2−	ε = 20, εp = 80		60.963 79 (32 #)
62 Ge	129 ms	10.088 (ε), 7.161 (εp)	0+	ε = 100 ?, εp =?		61.955 02 (15 #)
63 Ge	150 ms	9.626	3 / 2−	ε		62.949 628 (40)
64 Ge	63.7 s	4,517	0+	ε		63.941 6899 (40)
65 Ge	30.9 s	6.179	3 / 2−	ε		64.939 3681 (23)
66 Ge	2.26 h	2.117	0+	ε		65.933 8621 (26)
67 Ge	18.9 min	4.221	1 / 2−	ε		66.932 7339 (50)
67m1 Ge	13.7 µs	0.01917	5 / 2−	IT		66.932 754 48
67m2 Ge	110 ns	0.75267	9/2 +	IT		66.933 541 92
68 Ge	270.95 d	0.10694	0+	ε		67.928 0953 (20)
69 Ge	39.05 h	2.227	5 / 2−	ε		68.927 9645 (14)
69m1 Ge	5.1 µs	0.08683	1 / 2−	IT		68.928 057 72
69m2 Ge	2.81 µs	0.39793	9/2 +	IT		68.928 3917
70 Ge	stable		0+		020.57	69.924 248 75 (90)
71 Ge	11.43 d	0.233	1 / 2−	ε		70.924 952 33 (90)
71m1 Ge	20.41 ms	0.19716	9/2 +	IT		70.925 163 99
72 Ge	stable		0+		027.45	71.922 075 826 (81)
73 Ge	stable		9/2 +		007.75	72.923 458 956 (61)
73m1 Ge	0.499 s	0.06673	1 / 2−	IT		72.923 530 59
73m2 Ge	2.9 µs	0.01332	5/2 +	IT		72.923 473 26
74 Ge	stable		0+		036.5	73.921 177 761 (13)
75 Ge	82.78 min	1.177	1 / 2−	β -		74.922 858 370 (55)
75m1 Ge	47.7 s	0.14026 (IT), 1.318 (β - )	7/2 +	IT = 99.97, β - = 0.03		74.923 008 95
75m2 Ge	216 ns	0.19257	5/2 +	IT		74,923 0651
76 Ge	1.6 · 10 21 a	2.039	0+	2β	007.73	75.921 402 726 (19)
77 Ge	11.3 h	2.703	7/2 +	β -		76.923 549 843 (57)
77m1 Ge	52.9 s	2.862 (β - ), 0.159 (IT)	1 / 2−	β - = 81, IT = 19		76.923 720 07
78 Ge	88 min	0.95469	0+	β -		77.922 8529 (38)
79 Ge	18.98 s	4.109	1 / 2−	β -		78.925 360 (40)
79m1 Ge	39 s	4.334 (β - ), 0.22412 (IT)	7/2 +	β - = 96, IT = 4		78.925 6006
80 Ge	29.5 s	2,679	0+	β -		79.925 3508 (22)
81 Ge	7.6 s	6.242	9/2 +	β -		80.928 8329 (22)
81m1 Ge	7.6 s	6,909	1/2 +	β -		80.929 549 52
82 Ge	4.56 s	4.688	0+	β -		81.929 7740 (24)
83 Ge	1.85 s	8,693	5/2 +	β -		82.934 5391 (26)
84 Ge	954 ms	7.705 (β - ), 3.45 (β - n)	0+	β - = 89.8, β - n = 10.2		83.937 5751 (34)
85 Ge	0.56 s	10.066 (β - ), 4.659 (β - n)	5/2 +	β - = 86, β - n = 14		84.942 9697 (40)
86 Ge	226 ms	9.202	0+	β -		85.946 58 (32 #)
87 Ge	140 ms	11.54 (β - ), 6.813 (β - n)	5/2 +	β - = 100 ?, β - n =?		86.952 68 (43 #)
88 Ge	> 300 ns	10,582	0+	β -		87,956 91 (54 #)
89 Ge	> 300 ns	13,069		β - = 100?		88.963 79 (64 #)
90 Ge	> 635 ns	12.109 (β - ), 9.506 (β - n), 5.356 (β - 2n)	0+	β - =?, β - n =?, β - 2n =?		89.968 63 (75 #)

₃₃ arsenic

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
60 As		3.321		p = 100?		59.993 88 (43 #)
61 As		2.734		p = 100?		60.981 12 (32 #)
62 As		1.858		p = 100?		61.973 61 (32 #)
63 As	<43 ns	0.9827	3 / 2−	p		62.963 90 (21 #)
64 As	18 ms	14.662		ε		63.957 43 (33 #)
65 As	128 ms	9.541	3 / 2−	ε		64.949 611 (91)
66 As	95.77 ms	9,582	0	ε		65.944 1488 (61)
66m1 As	1.1 µs	1.88	5+	IT		65.946 166 48
66m2 As	8.2 µs	3,547	9+	IT		65.947 9563
67 As	42.5 s	6.071	5 / 2−	ε		66.939 251 11 (48)
68 As	151.6 s	8.084	3+	ε		67.936 7741 (20)
68m1 As	111 s	8.505 (ε), 0.42075 (IT)	1+	ε =?, IT =?		67.937 225 79
69 As	15.2 min	3,988	5 / 2−	ε		68.932 246 (34)
70 As	52.6 min	6.22	4+	ε		69.930 926 (54)
70m1 as	96 µs	0.03092	2+	IT		69.930 959 19
71 As	65.3 h	2.013	5 / 2−	ε		70.927 1138 (45)
72 As	26 h	4,356	2−	ε		71.926 7523 (44)
73 As	80.3 d	0.34479	3 / 2−	ε		72.923 8291 (41)
74 As	17.77 d	2.562 (ε), 1.353 (β - )	2−	ε = 66, β - = 34		73.923 9286 (18)
75 As	stable		3 / 2−		100	74.921 594 57 (95)
75m1 as	17.62 ms	0.30609	9/2 +	IT		74.921 923 17
76 As	1.0942 d	2,961	2−	β -		75.922 392 02 (95)
76m1 As	1.8 µs	0.04627	1+	IT		75.922 441 69
77 As	38.83 h	0.6832	3 / 2−	β -		76.920 6476 (18)
77m1 as	114 µs	0.47509	9/2 +	IT		76.921 157 63
78 As	90.7 min	4.209	2−	β -		77,921 828 (11)
79 As	9.01 min	2.281	3 / 2−	β -		78.920 9484 (58)
79m1 As	1.2 µs	0.7724	9/2 +	IT		78.921 7776
80 As	15.2 s	5.545	1+	β -		79.922 4746 (36)
81 As	33.3 s	3.856	3 / 2−	β -		80.922 1323 (29)
82 As	19.1 s	7.491	1+	β -		81.924 7412 (46)
82m1 As	13.6 s	7.37	5−	β -		81.924 611 43
83 As	13.4 s	5.671	3 / 2−	β -		82.925 2069 (30)
84 As	4.2 s	10.094 (β - ), 1.416 (β - n)	3−	β - = 99.82, β - n = 0.18		83.929 3033 (34)
85 As	2.021 s	9.225 (β - ), 4.687 (β - n)	3 / 2−	β - = 60.6, β - n = 59.4		84.932 1637 (33)
86 As	0.945 s	11.541 (β - ), 5.38 (β - n)		β - = 74, β - n = 26		85.936 7015 (37)
87 As	0.56 s	10.808 (β - ), 6.814 (β - n)	3 / 2−	β - = 84.6, β - n = 15.4		86.940 2917 (32)
88 As	0.2 s	13.164		β -		87.945 55 (21 #)
89 As	> 300 ns	12,194		β - = 100?		88.949 76 (32 #)
90 As	> 300 ns	14.466 (β - ), 9.591 (β - n)		β - =?, β - n =?		89.955 63 (64 #)
91 As	> 150 ns	13,442		β - = 100?		90.960 39 (64 #)
92 As		15.742		β -		91.966 74 (75 #)

₃₄ selenium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
64 Se	> 180 ns	12.724	0+	ε		63.971 09 (54 #)
65 Se	33 ms	13.776	3 / 2−	ε		64.964 40 (64 #)
66 Se	42 ms	10.657	0+	ε = 100?		65.955 59 (32 #)
67 Se	136 ms	10.007 (ε), 7.738 (εp)		ε = 99.5, εp = 0.5		66.949 994 (72)
68 Se	35.5 s	4.705	0+	ε		67.941 825 24 (53)
69 Se	27.4 s	6.678 (ε), 3.255 (εp)	3 / 2−	ε = 99.95, εp = 0.05		68.939 4148 (16)
69m1 se	2 µs	0.17265	5 / 2−	IT		68.939 600 15
69m2 se	955 ns	0.70715	9/2 +	IT		68.940 173 96
70 se	41.1 min	2,412	0+	β +		69.933 5155 (17)
71 Se	4.74 min	4,747	5 / 2−	ε		70.932 2094 (30)
71m1 se	560 ns	0.07904	1 / 2−	IT		90.932 294 25
71m2 se	19 µs	0.29074	9/2 +	IT		90.932 521 52
72 se	8.4 d	0.36161	0+	ε		71.927 1405 (21)
73 Se	7.15 h	2.725	9/2 +	ε		72.926 7549 (80)
73m1 se	39.8 min	2.761 (ε), 0.03608 (IT)	3 / 2−	ε = 27.4, IT = 72.6		72.926 793 63
74 Se	stable 2ε	1.209	0+	2ε	000.89	73.922 475 934 (15)
75 se	119.779 d	0.86471	5/2 +	ε		74.922 522 870 (78)
76 Se	stable		0+		009.37	75.919 213 704 (17)
77 Se	stable		1 / 2−		007.63	76.919 914 154 (67)
77m1 se	17.4 s	0.16238	7/2 +	IT		76.920 088 48
78 Se	stable		0+		023.77	77.917 309 28 (20)
79 Se	2.95 x 10 5 a	0.15061	7/2 +	β -		78.918 499 29 (24)
79m1 se	3.92 min	0.09622 (IT), 0.247 (β - )	1 / 2−	IT = 99.94, β - = 0.06		78.918 602 59
80 se	stable 2β		0+		049.61	79.916 5218 (13)
81 Se	18.45 min	1,587	1 / 2−	β -		80.917 9930 (14)
81m1 Se	57.28 min	0.10253 (IT), 1.689 (β - )	7/2 +	IT = 99.95, β - = 0.05		80.918 103 07
82 Se	91 · 10 18 a	2.996	0+	2β	008.73	81.916 6995 (15)
82m1 Se	6.6 ns	3.518	8+	IT		81.920 476 68
83 Se	22.3 min	3,673	9/2 +	β -		82.919 1186 (36)
83m1 se	70.1 s	3.901	1 / 2−	β -		82.919 363 73
84 Se	3.26 min	1,836	0+	β -		83.918 4668 (21)
85 Se	32.9 s	6.162	5/2 +	β -		84.922 2608 (28)
86 Se	14.3 s	5.129	0+	β -		85.924 3117 (27)
87 Se	5.5 s	7.466 (β - ), 1.135 (β - n)	5/2 +	β - = 99.8, β - n = 0.2		86.928 6886 (24)
88 Se	1.53 s	6.832 (β - ), 1.936 (β - n)	0+	β - = 99.33, β - n = 0.67		87.931 4175 (36)
89 Se	0.41 s	9.282 (β - ), 3.652 (β - n)	5/2 +	β - = 92.2, β - n = 7.8		88.936 6691 (40)
90 se	195 ms	8.204 (β - ), 4.407 (β - n)	0+	β - =?, β - n =?		89.940 10 (35)
91 Se	0.27 s	10.769 (β - ), 5.591 (β - n)		β - = 79, β - n = 21		90.945 96 (54 #)
92 Se	> 300 ns	9,509	0+	β -		91.949 84 (64 #)
93 Se	> 150 ns	12.259	1/2 +	β -		92.956 29 (86 #)
94 Se	> 150 ns	10.796	0+	β -		93.960 49 (86 #)
95 Se	> 392 ns	13,311		β - = 100?		94.967 30 (86 #)

₃₅ bromine

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
67 Br		1.15		p = 100?		66.964 65 (54 #)
68 Br	1.2 µs	0.84856		p = 100?		67,958 73 (33 #)
69 Br	24 ns	0.78872	5 / 2−	p = 100?		68,950 497 (40)
70 Br	79.1 ms	10.504	0+	ε		69.944 792 (16)
70m1 Br	2.2 s	12.796	9+	ε		69.947 2528
71 Br	21.4 s	6.644	5 / 2−	ε		70.939 3422 (58)
72 Br	78.6 s	8.801	3+	ε		71.936 5886 (72)
72M1 Br	10.6 s	0.15305 (IT), 8.954 (ε)	1−	IT = 100, ε =?		71.936 7529
73 Br	3.4 min	4.58	1 / 2−	ε		72.931 6715 (78)
74 Br	25.4 min	6.925	0	ε		73.929 9102 (63)
74m1 Br	46 min	9,921	4+	ε		73.929 906 05
75 Br	96.7 min	3.062	3 / 2−	ε		74.925 8105 (46)
76 Br	16.2 h	4.963	1−	ε		75.924 542 (10)
76m1 Br	1.31 s	0.10228 (IT), 5.066 (ε)	4+	IT = 99.4, ε = 0.6		75.924 6518
77 Br	57.036 h	1,365	3 / 2−	ε		76.921 3792 (30)
77m1 Br	4.28 min	0.10661	9/2 +	IT		76.921 493 65
78 Br	6.45 min	3.574 (ε), 0.72746 (β - )	1+	ε = 99.99, β - = 0.01		77.921 1459 (38)
79 Br	stable		3 / 2−		050.69	78.918 3376 (14)
79m1 Br	5.1 s	0.20714	9/2 +	IT		78.918 559 97
80 Br	17.68 min	1.87 (ε), 2.004 (β - )	1+	ε = 91.7, β - = 8.3		79.918 5298 (14)
80m1 Br	4.4205 h	0.08541	5−	IT		79.918 621 49
81 Br	stable		3 / 2−		049.31	80.916 2897 (14)
81m1 Br	34.6 µs	0.53704	9/2 +	IT		80.916 866 24
82 Br	35.282 h	3.093	5−	β -		81.916 8032 (14)
82m1 Br	6.13 min	0.04672 (IT), 3.14 (β - )	2−	IT = 97.6, β - = 2.4		81.916 853 36
83 Br	2.4 h	0.97662	3 / 2−	β -		82.915 1756 (41)
83m1 Br	700 ns	3.073	19 / 2−	IT		82.918 474 95
84 Br	31.76 min	4.656	2−	β -		83.916 496 (28)
84m1 Br	6 min	4.96	6−	β -		83.916 822 55
84m2 Br	100 ns	0.39237	1+	IT		83.916 917 23
85 Br	2.9 min	2.905	3 / 2−	β -		84.915 6458 (33)
86 Br	55.1 s	7.633	2−	β -		85.918 8054 (33)
87 Br	55.65 s	6.818 (β - ), 1.303 (β - n)	3 / 2−	β - = 97.4, β - n = 2.6		86.920 6740 (34)
88 Br	16.29 s	8.975 (β - ), 1.922 (β - n)	1, 2−	β - = 93.42, β - n = 6.58		87.924 0833 (34)
88m1 Br	5.3 µs	0.25406	5−	IT		87.924 356 04
89 Br	4.4 s	8.262 (β - ), 3.346 (β - n)	3 / 2−	β - = 86.2, β - n = 13.8		88.926 7046 (35)
90 Br	1.91 s	10.959 (β - ), 4.464 (β - n)	2−	β - = 74.8, β - n = 25.2		89.931 2928 (36)
91 Br	0.541 s	9.867 (β - ), 5.781 (β - n)	5 / 2−	β - = 80, β - n = 20		90.934 3986 (38)
92 Br	0.343 s	12.537 (β - ), 6.67 (β - n)	2−	β - = 66.9, β - n = 33.1		91.939 6316 (72)
93 Br	102 ms	11.162 (β - ), 7.724 (β - n)	5 / 2−	β - = 32, β - n = 68		92.943 13 (48)
94 Br	70 ms	13.749 (β - ), 8.465 (β - n)		β - = 32, β - n = 68		93.948 90 (43 #)
95 Br	> 150 ns	12.388 (β - ), 9.506 (β - n)	3 / 2−	β - = 66, β - n = 34		94.953 01 (21 #)
96 Br	> 150 ns	14.916 (β - ), 9.924 (β - n)		β - = 72.4, β - n = 27.6		95.959 03 (32 #)
97 Br	> 300 ns	13,367	3 / 2−	β - = 100?		96.963 44 (43 #)
98 Br	> 634 ns	15.863 (β - ), 10.903 (β - n), 8.489 (β - 2n)		β - =?, β - n =?, β - 2n =?		97.969 46 (43 #)

₃₆ krypton

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
69 kr	32 ms	13.677	5 / 2−	ε		68.965 18 (43 #)
70 kr	52 ms	10.478 (ε), 8.197 (β + p)	0+	ε = 98.7, β + p = 1.3		69,956 04 (21 #)
71 kr	100 ms	10.179 (ε), 8.318 (εp)	5 / 2−	ε = 97.9, εp = 2.1		70.950 27 (14)
72 kr	17.1 s	5.127 (ε), 1.917 (εp)	0+	ε ≈ 100, εp = 1 · 10 −6		71.942 0924 (86)
73 kr	27.3 s	7.096 (ε), 4.028 (εp)	5 / 2−	ε = 99.75, εp = 0.25		72.939 2892 (71)
73m1 Kr	107 p	0.43435	9/2 +	IT		72.939 755 49
74 kr	11.5 min	2.956	0+	ε		73.933 0840 (22)
75 kr	4.29 min	4,783	5/2 +	ε		74.930 9457 (87)
76 kr	14.8 h	1.275	0+	ε		75.925 9103 (43)
77 kr	74.4 min	3.065	5/2 +	ε		76.924 6700 (21)
78 kr	> 1.5 · 10 21 a	2.846	0+	2ε	000.355	77.920 364 94 (76)
79 kr	35.04 h	1.628	1 / 2−	ε		78.920 0829 (38)
79m1 Kr	50 s	0.1294	7/2 +	IT		78.920 221 82
80 kr	stable		0+		002.286	79.916 378 08 (75)
81 kr	2.29 x 10 5 a	0.28085	7/2 +	ε		80.916 5912 (15)
81m1 Kr	13.1 s	0.1914 (IT), 0.47225 (ε)	1 / 2−	IT ≈ 100, ε = 2.5 · 10 −3		80.916 796 68
82 kr	stable		0+		011,593	81.913 482 73 (94)
83 kr	stable		9/2 +		011.5	82.914 127 16 (32)
83m1 Kr	1.85 h	0.04994	1 / 2−	IT		82.914 180 77
83m2 Kr	154.4 ns	0.01774	7/2 +	IT		82.914 1462
84 kr	stable		0+		056.987	83.911 497 7282 (44)
84m1 Kr	1.9 µs	0.33194	8+	IT		83.911 854 08
85 kr	10,752 a	0.68704	9/2 +	β -		84.912 5273 (21)
85m1 Kr	4.48 h	0.99203 (β - ), 0.305 (IT)	1 / 2−	β - = 78.6, IT = 21.4		84.912 854 73
85m2 Kr	1.7 µs	1.992	19/2 +	IT		84.914 665 58
86 kr	stable 2β		0+		017,279	85.910 610 6269 (41)
87 kr	76.3 min	3.889	5/2 +	β -		86.913 354 76 (26)
88 kr	2.84 h	2.918	0+	β -		87.914 4479 (28)
89 kr	3.15 min	5.177	3/2 +	β -		88.917 8355 (23)
90 kr	32.32 s	4.405	0+	β -		89.919 5279 (20)
91 kr	8.57 s	6.771	5/2 +	β -		90.923 8063 (24)
92 kr	1.84 s	6.003 (β - ), 0.90447 (β - n)	0+	β - = 97.97, β - n = 0.03		91.926 1731 (29)
93 kr	1.286 s	8.484 (β - ), 2.565 (β - n)	1/2 +	β - = 98.05, β - n = 1.95		92.931 1472 (27)
94 kr	212 ms	7.215 (β - ), 3.2 (β - n)	0+	β - = 98.89, β - n = 1.11		93.934 140 (13)
95 kr	114 ms	9.735 (β - ), 4.333 (β - n)	1/2	β - = 97.13, β - n = 2.87		94.939 711 (20)
96 kr	80 ms	8.275 (β - ), 4.743 (β - n)	0+	β - = 96.3, β - n = 3.7		95.943 017 (22)
97 kr	63 ms	11.097 (β - ), 5.861 (β - n)	3/2 +	β - = 93.3, β - n = 6.7		96.949 09 (14)
98 kr	46 ms	10.007 (β - ), 6.137 (β - n)	0+	β - = 93, β - n = 7		97.952 43 (32 #)
99 kr	13 ms	12.445 (β - ), 7.488 (β - n)	3/2 +	β - = 89, β - n = 11		98.958 39 (54 #)
100 kr	7 ms	11.495 (β - ), 8.081 (β - n)	0+	β - ≈ 100, β - n =?		99.962 37 (43 #)
101 kr	> 635 ns	13.684 (β - ), 9.348 (β - n), 5.934 (β - 2n)		β - =?, β - n =?, β - 2n =?		100.968 73 (54 #)

₃₇ rubidium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
74 Rb	64.9 ms	10.4	(0+)	εβ +
75 Rb	19.0 s	7.02	(3 / 2−, 5 / 2−)	εβ +
76 Rb	36.5 s	8.50	1 (-)	εβ +
77 Rb	3.77 min	5.346	3 / 2−	εβ +
78 Rb	17.66 min	7.224	0 (+)	εβ +
78m1 Rb	5.74 min	7.327 (εβ + ), 0.103 (IT)	4 (-)	εβ + = 90, IT = 10
79 Rb	22.9 min	3,649	5/2 +	εβ +
80 Rb	34 p	5.723	1+	εβ +
81 Rb	4.576 h	2.237	3 / 2−	εβ +
81m1 Rb	30.5 min	0.086 (IT), 2.237 (εβ + )	9/2 +	IT = 97.6, εβ + = 2.4
82 Rb	1.273 min	0.910	1+	εβ +
82m1 Rb	6.472 h	4.469 (εβ + ), 0.069 (IT)	5−	εβ + ≈ 100, IT <0.33
83 Rb	86.2 d	0.910	5 / 2−	ε
83m1 Rb	7.8 ms		9/2 +	IT =?, Εβ + =?
84 Rb	32.77 d	2.681 (εβ + ), 0.894 (β - )	2−	εβ + = 96.2, β - = 3.8
84m1 Rb	20.26 min	0.464	6−	IT
85 Rb	stable		5 / 2−		072.165
86 Rb	18,631 d	1.774 (β - ), 0.519 (εβ + )	2−	β - ≈ 100, εβ + = 0.0052
86m1 Rb	1.017 min	0.556	6−	IT
87 Rb	4.81 x 10 10 a	0.2833	3 / 2−	β -	027.835
88 Rb	17.78 min	5.316	2−	β -
89 Rb	15.15 min	4,501	3 / 2−	β -
90 Rb	158 s	6.590	0−	β -
90M1 Rb	258 s	6.697 (β - ) 0.107 (IT)	3−	β - = 97.4, IT = 2.6
91 Rb	58.4 s	5.861	3/2 (-)	β -
92 Rb	4.492 s	8.105 (β - ), 0.763 (β - n)	0−	β - ≈ 100, β - n = 0.0107
93 Rb	5.84 s	7.462 (β - ), 2.178 (β - n)	5 / 2−	β - ≈ 100, β - n = 1.39
94 Rb	2.702 s	10.307 (β - ), 3.560 (β - n)	3 (-)	β - ≈ 100, β - n = 10.4
95 Rb	377.5 ms	9.279 (β - ), 4.932 (β - n)	5 / 2−	β - ≈ 100, β - n = 8.73
96 Rb	0.199 s	11.756 (β - ), 5.861 (β - n)	2+	β - ≈ 100, β - n = 13.8
97 Rb	169.9 ms	10.42 (β - ), 6.54 (β - n)	3/2 (+)	β - ≈ 100, β - n = 25.1
98 Rb	114 ms	12.344 (β - ), 6.46 (β - n), 2.57 (β - 2n)	(1, 0)	β - ≈ 100, β - n = 13.6, β - 2n = 0.051
98m1 Rb	96 ms	12.614 (β - ), 6.73 (β - n)	(4, 5)	β -
99 Rb	50.3 ms	11.25 (β - ), 7.61 (β - n)	(5/2 +)	β - ≈ 100, β - n = 20.7
100 Rb	51 ms	13.50 (β - ), 7.40 (β - n),? (β - 2n)		β - ≈ 100, β - n = 6, β - 2n = 0.16
101 Rb	32 ms	11.81 (β - ), 8.55 (β - n)	(3/2 +)	β - ≈ 100, β - n = 28
102 Rb	37 ms			β - ≈ 100, β - n = 18

₃₈ strontium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
75 Sr	71 ms	10.6 (εβ + ), 8.3 (εp)		εβ + ≈ 100, εp = 6.5
76 Sr	8.9 s	6.1	0+	εβ +
77 Sr	9.0 s	6.85 (εβ + ), 3.71 (εp)	5/2 +	εβ + ≈ 100, εp <0.25
78 Sr	2.5 min	3,762	0+	εβ +
79 Sr	2.25 min	5.318	3/2 (-)	εβ +
80 Sr	106.3 min	1,868	0+	εβ +
81 Sr	22.3 min	3,930	1 / 2−	εβ +
82 Sr	25.55 d	0.180	0+	ε
83 Sr	32.41 h	2.276	7/2 +	εβ +
83m1 Sr	4.95 s	0.259	1 / 2−	IT
84 Sr	stable 2ε		0+		000.56
85 Sr	64.84 d	1.065	9/2 +	ε
85m1 Sr	67.63 min	0.239 (IT), 1.304 (εβ + )	1 / 2−	IT = 86.6, εβ + = 13.4
86 Sr	stable		0+		009.86
86m1 Sr	0.45 µs	2.956	8+	IT
87 Sr	stable		9/2 +		007.00
87m1 Sr	2.803 h	0.389 (IT), 0.106 (ε)	1 / 2−	IT = 99.70, ε = 0.30
88 Sr	stable		0+		082.58
89 Sr	50.53 d	1.495	5/2 +	β -
90 Sr	28.79 a	0.546	0+	β -
91 Sr	9.63 h	2,699	5/2 +	β -
92 Sr	2.71 h	1.911	0+	β -
93 Sr	7.423 min	4.137	5/2 +	β -
94 Sr	75.3 s	3.511	0+	β -
95 Sr	23.90 s	6.080	1/2 +	β -
96 Sr	1.07 s	5.371	0+	β -
97 Sr	426 ms	7.467 (β - ), 1.488 (β - n)	1/2 +	β - ≈ 100, β - n = 0.005
97m1 Sr	0.17 µs	0.308	7/2 +	IT
97m2 Sr	0.255 µs	0.831	11 / 2−	IT
98 Sr	0.653 s	5.826 (β - ), 1.580 (β - n)	0+	β - ≈ 100, β - n = 0.18
99 Sr	0.269 s	8.03 (β - ), 2.19 (β - n)	3/2 +	β - ≈ 100, β - n = 0.100
100 Sr	202 ms	7.08 (β - ), 1.91 (β - n)	0+	β - ≈ 100, β - n = 0.78
101 Sr	118 ms	8.82 (β - ), 3.76 (β - n)	(5 / 2−)	β - ≈ 100, β - n = 2.37
102 Sr	69 ms		0+	β - = 95.2, β - n = 4.8

₃₉ yttrium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
77 Y	63 ms	11.0		εβ +
79 Y	14.8 s	7.1 (εβ + ), 1.3 (εp)	(5/2 +)	εβ + ≈ 100, εp =?
80 Y	35 s	9.1	(3,4,5)	εβ +
81 Y	70.4 s	5.51	(5/2 +)	εβ +
82 Y	9.5 s	7.82	1+	εβ +
83 Y	7.08 min	4.47	(9/2 +)	εβ +
83m1 Y	2.85 min	4.532 (εβ + ), 0.062 (IT)	(3 / 2−)	εβ + = 60, IT = 40
84 Y	4.6 s	6.49	1+	εβ +
84m1 Y	39.5 min	6.49	(5−)	εβ +
85 Y	2.68 h	3.25	(1/2) -	εβ +
85m1 Y	4.86 h	3.27 (εβ + ), 0.02 (IT)	9/2 +	εβ + ≈ 100, IT <2 · 10 −3
86 Y	14.74 h	5.24	4−	εβ +
86m1 Y	48 min	0.218 (IT), 5.458 (εβ + )	(8+)	IT = 99.31, εβ + = 0.69
87 Y	79.8 h	1,862	1 / 2−	εβ +
87m1 Y	13.37 h	0.381 (IT), 2.243 (εβ + )	9/2 +	IT = 98.43, εβ + = 1.57
88 Y	106.65 d	3.623	4−	εβ +
88m1 Y	13.9 ms		(8) +	IT
89 Y	stable		1 / 2−		100
89m1 Y	16.06 s	0.909	9/2 +	IT
90 Y	64.00 h	2.282	2−	β -
90m1 Y	3.19 h	0.682 (IT), 2.964 (β - )	7+	IT ≈ 100, β - = 0.0018
91 Y	58.51 d		1 / 2−	β -
91m1 Y	49.71 min		9/2 +	IT = 100, β - <1.5
92 Y	3.54 h	3,639	2−	β -
93 Y	10.18 h	2.893	1 / 2−	β -
93m1 Y	0.82 s	0.759	7/2 +	IT
94 Y	18.7 min	4,919	2−	β -
95 Y	10.3 min	4,420	1 / 2−	β -
96 Y	5.34 s	7,087	0−	β -
96m1 Y	9.6 s	7,087	(8+)	β -
97 Y	3.75 s	6.688 (β - ), 1.108 (β - n)	(1 / 2−)	β - ≈ 100, β - n = 0.055
97m1 Y	1.17 s	7.356 (β - ), 0.668 (IT), 1.776 (β - n)	9/2 +	β - > 99.3, IT <0.7, β - n <0.08
97m2 Y	142 ms	3.523 (IT), 10.211 (β - )	27 / 2−	IT> 80, β - <20
98 Y	0.584 s	8.830 (β - ), 2.443 (β - n)	0−	β - ≈ 100, β - n = 0.33
98m1 Y	2 s	8.830 (β - ), 0.0 (IT), 2.443 (β - n)	4, 5	β - = 90, IT <20, β - = 3.4
99 Y	1.470 s	7.567 (β - ), 2.990 (β - n)	5/2 +	β - ≈ 100, β - n = 1.9
100 Y	0.735 s	9.31 (β - ), 2.40 (β - n)	1−, 2−	β - ≈ 100, β - n = 0.92
100m1 Y	0.94 s	9.31 (β - )	3, 4, 5	β -
101 Y	0.45 s	8.55 (β - ), 3.62 (β - n)	5/2 +	β - ≈ 100, β - n = 1.94
102 Y	0.36 s	9.85 (β - )		β -
102m1 Y	0.3 s	9.85 (β - )		β -
103 Y	0.23 s	9.6 (β - ), 4.9 (β - n)	5/2 +	β - ≈ 100, β - n = 8
104 Y		11.8 (β - )		β -

₄₀ zirconium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)	Mass (u)
81 Zr	15 s	7.2 (εβ + ), 4.2 (εp)		εβ + ≈ 100, εp =?
82 Zr	32 p	4.0	0+	εβ +
83 Zr	44 s	5.87 (εβ + ), 2.26 (εp)	(1 / 2−)	εβ + ≈ 100, εp =?
84 Zr	25.9 min		0+	εβ +
85 Zr	7.86 min	4.69	7/2 +	εβ +
85m1 Zr	10.9 s	4.982 (εβ + ), 0.292 (IT)	(1 / 2−)	εβ + > 8, IT <92
86 Zr	16.5 h	1,480	0+	εβ +
87 Zr	1.68 h	3,665	(9/2) +	εβ +
87m1 Zr	14.0 s	0.336	(1/2) -	IT
88 Zr	83.4 d	0.670	0+	ε
89 Zr	78.41 h	2.832	9/2 +	εβ +
89m1 Zr	4.18 min	3.420 (εβ + ), 0.588 (IT)	1 / 2−	εβ + = 6.23, IT = 93.77
90 Zr	stable		0+		051.45
90m1 Zr	809.2 ms	2,319	5−	IT
91 Zr	stable		5/2 +		011.22
92 zr	stable		0+		017.15
93 Zr	1.53 · 10 6 a	0.091	5/2 +	β -
94 Zr	stable 2β		0+		017.38
95 Zr	64.02 d	1.125	5/2 +	β -
96 Zr	3.8 · 10 19 a	3.350	0+	2β -	002.80
97 Zr	16.91 h	2.658	1/2 +	β -
98 Zr	30.7 s	2.261	0+	β -
99 Zr	2.1 s	4,558	(1/2 +)	β -
100 Zr	7.1 s	3.34	0+	β -
101 Zr	2.3 s	5.49	(3/2 +)	β -
102 Zr	2.9 s	4.61	0+	β -
103 Zr	1.3 s	6.95	(5 / 2−)	β -
104 Zr	1.2 s	5.9	0+	β -
105 Zr	0.6 s	8.5	0+	β -

swell

See also list of isotopes # web links