锶（Sr，原子量：87.62(1)）共有39个同位素，其中有4个同位素是稳定的。
Quick Facts 同位素, 衰变 ...
Close
More information 符号, Z ...
| 符号
|
Z
|
N
|
同位素质量（u）
[n 1][n 2]
|
半衰期
[n 1][n 2]
|
衰变
方式[3]
|
衰变
产物
[n 3][n 4]
|
原子核
自旋[n 1]
|
相对丰度
（莫耳分率）[n 2]
|
相对丰度
的变化量
（莫耳分率）
|
| 激发能量[n 2]
|
73
Sr
|
38
|
35
|
72.96597(64)#
|
>25 ms
|
β+ (>99.9%)
|
73Rb
|
1/2-#
|
|
|
| β+, p (<.1%)
|
72Kr
|
| 74Sr
|
38
|
36
|
73.95631(54)#
|
50# ms [>1.5 µs]
|
β+
|
74Rb
|
0+
|
|
|
| 75Sr
|
38
|
37
|
74.94995(24)
|
88(3) ms
|
β+ (93.5%)
|
75Rb
|
(3/2-)
|
|
|
| β+, p (6.5%)
|
74Kr
|
| 76Sr
|
38
|
38
|
75.94177(4)
|
7.89(7) s
|
β+
|
76Rb
|
0+
|
|
|
| 77Sr
|
38
|
39
|
76.937945(10)
|
9.0(2) s
|
β+ (99.75%)
|
77Rb
|
5/2+
|
|
|
| β+, p (.25%)
|
76Kr
|
| 78Sr
|
38
|
40
|
77.932180(8)
|
159(8) s
|
β+
|
78Rb
|
0+
|
|
|
| 79Sr
|
38
|
41
|
78.929708(9)
|
2.25(10) min
|
β+
|
79Rb
|
3/2(-)
|
|
|
| 80Sr
|
38
|
42
|
79.924521(7)
|
106.3(15) min
|
β+
|
80Rb
|
0+
|
|
|
| 81Sr
|
38
|
43
|
80.923212(7)
|
22.3(4) min
|
β+
|
81Rb
|
1/2-
|
|
|
| 82Sr
|
38
|
44
|
81.918402(6)
|
25.36(3) d
|
ε
|
82Rb
|
0+
|
|
|
| 83Sr
|
38
|
45
|
82.917557(11)
|
32.41(3) h
|
β+
|
83Rb
|
7/2+
|
|
|
| 83mSr
|
259.15(9) keV
|
4.95(12) s
|
IT
|
83Sr
|
1/2-
|
|
|
| 84Sr
|
38
|
46
|
83.913425(3)
|
观测上稳定[n 5]
|
0+
|
0.0056(1)
|
0.0055-0.0058
|
| 85Sr
|
38
|
47
|
84.912933(3)
|
64.853(8) d
|
ε
|
85Rb
|
9/2+
|
|
|
| 85mSr
|
238.66(6) keV
|
67.63(4) min
|
IT (86.6%)
|
85Sr
|
1/2-
|
|
|
| β+ (13.4%)
|
85Rb
|
| 86Sr
|
38
|
48
|
85.9092607309(91)
|
稳定
|
0+
|
0.0986(1)
|
0.0975-0.0999
|
| 86mSr
|
2955.68(21) keV
|
455(7) ns
|
|
|
8+
|
|
|
| 87Sr[n 6]
|
38
|
49
|
86.9088774970(91)
|
稳定
|
9/2+
|
0.0700(1)
|
0.0694-0.0714
|
| 87mSr
|
388.533(3) keV
|
2.815(12) h
|
IT (99.7%)
|
87Sr
|
1/2-
|
|
|
| ε (.3%)
|
87Rb
|
88
Sr
[n 7]
|
38
|
50
|
87.9056122571(97)
|
稳定
|
0+
|
0.8258(1)
|
0.8229-0.8275
|
| 89Sr[n 7]
|
38
|
51
|
88.9074507(12)
|
50.57(3) d
|
β−
|
89Y
|
5/2+
|
|
|
90
Sr
[n 7]
|
38
|
52
|
89.907738(3)
|
28.90(3) y
|
β−
|
90Y
|
0+
|
|
|
| 91Sr
|
38
|
53
|
90.910203(5)
|
9.63(5) h
|
β−
|
91Y
|
5/2+
|
|
|
| 92Sr
|
38
|
54
|
91.911038(4)
|
2.66(4) h
|
β−
|
92Y
|
0+
|
|
|
| 93Sr
|
38
|
55
|
92.914026(8)
|
7.423(24) min
|
β−
|
93Y
|
5/2+
|
|
|
| 94Sr
|
38
|
56
|
93.915361(8)
|
75.3(2) s
|
β−
|
94Y
|
0+
|
|
|
| 95Sr
|
38
|
57
|
94.919359(8)
|
23.90(14) s
|
β−
|
95Y
|
1/2+
|
|
|
| 96Sr
|
38
|
58
|
95.921697(29)
|
1.07(1) s
|
β−
|
96Y
|
0+
|
|
|
| 97Sr
|
38
|
59
|
96.926153(21)
|
429(5) ms
|
β− (99.95%)
|
97Y
|
1/2+
|
|
|
| β−, n (.05%)
|
96Y
|
| 97m1Sr
|
308.13(11) keV
|
170(10) ns
|
|
|
(7/2)+
|
|
|
| 97m2Sr
|
830.8(2) keV
|
255(10) ns
|
|
|
(11/2-)#
|
|
|
| 98Sr
|
38
|
60
|
97.928453(28)
|
0.653(2) s
|
β− (99.75%)
|
98Y
|
0+
|
|
|
| β−, n (.25%)
|
97Y
|
| 99Sr
|
38
|
61
|
98.93324(9)
|
0.269(1) s
|
β− (99.9%)
|
99Y
|
3/2+
|
|
|
| β−, n (.1%)
|
98Y
|
| 100Sr
|
38
|
62
|
99.93535(14)
|
202(3) ms
|
β− (99.02%)
|
100Y
|
0+
|
|
|
| β−, n (.98%)
|
99Y
|
| 101Sr
|
38
|
63
|
100.94052(13)
|
118(3) ms
|
β− (97.63%)
|
101Y
|
(5/2-)
|
|
|
| β−, n (2.37%)
|
100Y
|
| 102Sr
|
38
|
64
|
101.94302(12)
|
69(6) ms
|
β− (94.5%)
|
102Y
|
0+
|
|
|
| β−, n (5.5%)
|
101Y
|
| 103Sr
|
38
|
65
|
102.94895(54)#
|
50# ms [>300 ns]
|
β−
|
103Y
|
|
|
|
| 104Sr
|
38
|
66
|
103.95233(75)#
|
30# ms [>300 ns]
|
β−
|
104Y
|
0+
|
|
|
| 105Sr
|
38
|
67
|
104.95858(75)#
|
20# ms [>300 ns]
|
|
|
|
|
|
Close
画上#号的数据代表没有经过实验的证明，仅为理论推测。
Believed to decay by β+β+ to 84Kr Used in rubidium-strontium dating
存档副本. [2015-09-14]. （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).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report) （页面存档备份，存于互联网档案馆）. Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) （页面存档备份，存于互联网档案馆）.
- 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.
