スズ（Sn）の同位体には10種類もの安定同位体が存在する。これは、50が陽子の魔法数であるからだと考えられる。28種類の不安定同位体も知られ、中には1994年に見つかった、魔法数の2倍の100Snもある[1]。
標準原子量は118.710(7) uである。
一覧 [編集]
| 同位体核種 |
Z(p) |
N(n) |
同位体質量 (u) |
半減期 |
核スピン数 |
天然存在比 |
天然存在比
(範囲) |
| 励起エネルギー |
| 99Sn |
50 |
49 |
98.94933(64)# |
5# ms |
9/2+# |
|
|
| 100Sn |
50 |
50 |
99.93904(76) |
1.1(4) s [0.94(+54-27) s] |
0+ |
|
|
| 101Sn |
50 |
51 |
100.93606(32)# |
3(1) s |
5/2+# |
|
|
| 102Sn |
50 |
52 |
101.93030(14) |
4.5(7) s |
0+ |
|
|
| 102mSn |
2017(2) keV |
720(220) ns |
(6+) |
|
|
| 103Sn |
50 |
53 |
102.92810(32)# |
7.0(6) s |
5/2+# |
|
|
| 104Sn |
50 |
54 |
103.92314(11) |
20.8(5) s |
0+ |
|
|
| 105Sn |
50 |
55 |
104.92135(9) |
34(1) s |
(5/2+) |
|
|
| 106Sn |
50 |
56 |
105.91688(5) |
115(5) s |
0+ |
|
|
| 107Sn |
50 |
57 |
106.91564(9) |
2.90(5) min |
(5/2+) |
|
|
| 108Sn |
50 |
58 |
107.911925(21) |
10.30(8) min |
0+ |
|
|
| 109Sn |
50 |
59 |
108.911283(11) |
18.0(2) min |
5/2(+) |
|
|
| 110Sn |
50 |
60 |
109.907843(15) |
4.11(10) h |
0+ |
|
|
| 111Sn |
50 |
61 |
110.907734(7) |
35.3(6) min |
7/2+ |
|
|
| 111mSn |
254.72(8) keV |
12.5(10) µs |
1/2+ |
|
|
| 112Sn |
50 |
62 |
111.904818(5) |
STABLE |
0+ |
0.0097(1) |
|
| 113Sn |
50 |
63 |
112.905171(4) |
115.09(3) d |
1/2+ |
|
|
| 113mSn |
77.386(19) keV |
21.4(4) min |
7/2+ |
|
|
| 114Sn |
50 |
64 |
113.902779(3) |
STABLE |
0+ |
0.0066(1) |
|
| 114mSn |
3087.37(7) keV |
733(14) ns |
7- |
|
|
| 115Sn |
50 |
65 |
114.903342(3) |
STABLE |
1/2+ |
0.0034(1) |
|
| 115m1Sn |
612.81(4) keV |
3.26(8) µs |
7/2+ |
|
|
| 115m2Sn |
713.64(12) keV |
159(1) µs |
11/2- |
|
|
| 116Sn |
50 |
66 |
115.901741(3) |
STABLE |
0+ |
0.1454(9) |
|
| 117Sn |
50 |
67 |
116.902952(3) |
STABLE |
1/2+ |
0.0768(7) |
|
| 117m1Sn |
314.58(4) keV |
13.76(4) d |
11/2- |
|
|
| 117m2Sn |
2406.4(4) keV |
1.75(7) µs |
(19/2+) |
|
|
| 118Sn |
50 |
68 |
117.901603(3) |
STABLE |
0+ |
0.2422(9) |
|
| 119Sn |
50 |
69 |
118.903308(3) |
STABLE |
1/2+ |
0.0859(4) |
|
| 119m1Sn |
89.531(13) keV |
293.1(7) d |
11/2- |
|
|
| 119m2Sn |
2127.0(10) keV |
9.6(12) µs |
(19/2+) |
|
|
| 120Sn |
50 |
70 |
119.9021947(27) |
STABLE |
0+ |
0.3258(9) |
|
| 120m1Sn |
2481.63(6) keV |
11.8(5) µs |
(7-) |
|
|
| 120m2Sn |
2902.22(22) keV |
6.26(11) µs |
(10+)# |
|
|
| 121Sn |
50 |
71 |
120.9042355(27) |
27.03(4) h |
3/2+ |
|
|
| 121m1Sn |
6.30(6) keV |
43.9(5) a |
11/2- |
|
|
| 121m2Sn |
1998.8(9) keV |
5.3(5) µs |
(19/2+)# |
|
|
| 121m3Sn |
2834.6(18) keV |
0.167(25) µs |
(27/2-) |
|
|
| 122Sn |
50 |
72 |
121.9034390(29) |
STABLE |
0+ |
0.0463(3) |
|
| 123Sn |
50 |
73 |
122.9057208(29) |
129.2(4) d |
11/2- |
|
|
| 123m1Sn |
24.6(4) keV |
40.06(1) min |
3/2+ |
|
|
| 123m2Sn |
1945.0(10) keV |
7.4(26) µs |
(19/2+) |
|
|
| 123m3Sn |
2153.0(12) keV |
6 µs |
(23/2+) |
|
|
| 123m4Sn |
2713.0(14) keV |
34 µs |
(27/2-) |
|
|
| 124Sn |
50 |
74 |
123.9052739(15) |
STABLE [>100E+15 a] |
0+ |
0.0579(5) |
|
| 124m1Sn |
2204.622(23) keV |
0.27(6) µs |
5- |
|
|
| 124m2Sn |
2325.01(4) keV |
3.1(5) µs |
7- |
|
|
| 124m3Sn |
2656.6(5) keV |
45(5) µs |
(10+)# |
|
|
| 125Sn |
50 |
75 |
124.9077841(16) |
9.64(3) d |
11/2- |
|
|
| 125mSn |
27.50(14) keV |
9.52(5) min |
3/2+ |
|
|
| 126Sn |
50 |
76 |
125.907653(11) |
2.30(14)E+5 a |
0+ |
trace |
|
| 126m1Sn |
2218.99(8) keV |
6.6(14) µs |
7- |
|
|
| 126m2Sn |
2564.5(5) keV |
7.7(5) µs |
(10+)# |
|
|
| 127Sn |
50 |
77 |
126.910360(26) |
2.10(4) h |
(11/2-) |
|
|
| 127mSn |
4.7(3) keV |
4.13(3) min |
(3/2+) |
|
|
| 128Sn |
50 |
78 |
127.910537(29) |
59.07(14) min |
0+ |
|
|
| 128mSn |
2091.50(11) keV |
6.5(5) s |
(7-) |
|
|
| 129Sn |
50 |
79 |
128.91348(3) |
2.23(4) min |
(3/2+)# |
|
|
| 129mSn |
35.2(3) keV |
6.9(1) min |
(11/2-)# |
|
|
| 130Sn |
50 |
80 |
129.913967(11) |
3.72(7) min |
0+ |
|
|
| 130m1Sn |
1946.88(10) keV |
1.7(1) min |
(7-)# |
|
|
| 130m2Sn |
2434.79(12) keV |
1.61(15) µs |
(10+) |
|
|
| 131Sn |
50 |
81 |
130.917000(23) |
56.0(5) s |
(3/2+) |
|
|
| 131m1Sn |
80(30)# keV |
58.4(5) s |
(11/2-) |
|
|
| 131m2Sn |
4846.7(9) keV |
300(20) ns |
(19/2- to 23/2-) |
|
|
| 132Sn |
50 |
82 |
131.917816(15) |
39.7(8) s |
0+ |
|
|
| 133Sn |
50 |
83 |
132.92383(4) |
1.45(3) s |
(7/2-)# |
|
|
| 134Sn |
50 |
84 |
133.92829(11) |
1.050(11) s |
0+ |
|
|
| 135Sn |
50 |
85 |
134.93473(43)# |
530(20) ms |
(7/2-) |
|
|
| 136Sn |
50 |
86 |
135.93934(54)# |
0.25(3) s |
0+ |
|
|
| 137Sn |
50 |
87 |
136.94599(64)# |
190(60) ms |
5/2-# |
|
|
出典 [編集]
- ^ Phil Walker (1994). “Doubly Magic Discovery of Tin-100”. PHYSICS WORLD 7 (June). http://physicsworldarchive.iop.org/index.cfm?action=summary&doc=7%2F6%2Fphwv7i6a24%40pwa-xml&qt=.
参考文献 [編集]
- 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). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
- 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, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (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.
