スズの同位体
スズ（Sn）には10種類もの安定な同位体が存在する。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、二重魔法数の100Snもある[1]。
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).
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.