Isotopes of tin

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Template:Short description Template:Infobox tin isotopes Tin (50Sn) is the element with the greatest number of naturally abundant isotopes, 10. Seven, 114-120Sn, are theoretically stable, while the remaining three, 112Sn, 122Sn, and 124Sn, are potentially radioactive to double beta decay, but no decay has been observed. This is generally attributed to the fact that 50 is a "magic number" of protons. In addition, 32 unstable tin isotopes are known, including tin-100 (100Sn) and tin-132 (132Sn), which are both "doubly magic". The longest-lived of these is tin-126 (126Sn), with a half-life about 230,000 years; with all others less than a year and the majority under 20 minutes.

The number of known metastable states is very large, including a long series of low-lying states in odd isotopes from 117 on, which gives two nuclides with a longer life than any ground-state radioisotope other than 126: 121mSn, half-life 43.9 years, and 119mSn, half-life 293.1 days.

List of isotopes


Template:Isotopes table |-id=Tin-98 | 98Sn[1] | style="text-align:right" | 50 | style="text-align:right" | 48 | | style="text-align:center" | 2025 | | | | 0+ | | |-id=Tin-99 | rowspan=2|99Sn[n 1] | rowspan=2 style="text-align:right" | 50 | rowspan=2 style="text-align:right" | 49 | rowspan=2|98.94850(63)# | rowspan=2 style="text-align:center" | 2012 | rowspan=2|24(4) ms | β+ (95%) | 99In | rowspan=2|9/2+# | rowspan=2| | rowspan=2| |- | β+, p (5%) | 98Cd |-id=Tin-100 | rowspan=2|100Sn[n 2] | rowspan=2 style="text-align:right" | 50 | rowspan=2 style="text-align:right" | 50 | rowspan=2|99.93865(26) | rowspan=2 style="text-align:center" | 1994 | rowspan=2|1.18(8) s | β+ (>83%) | 100In | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | β+, p (<17%) | 99Cd |-id=Tin-101 | rowspan=2|101Sn | rowspan=2 style="text-align:right" | 50 | rowspan=2 style="text-align:right" | 51 | rowspan=2|100.93558(32)#[2] | rowspan=2 style="text-align:center" | 1994 | rowspan=2|2.22(5) s | β+ | 101In | rowspan=2|(7/2+) | rowspan=2| | rowspan=2| |- | β+, p? | 100Cd |-id=Tin-102 | 102Sn | style="text-align:right" | 50 | style="text-align:right" | 52 | 101.93029(11) | style="text-align:center" | 1994 | 3.8(2) s | β+ | 102In | 0+ | | |-id=Tin-102m | style="text-indent:1em" | 102mSn | colspan="3" style="text-indent:2em" | 2017(2) keV | style="text-align:center" | 1996 | 367(8) ns | IT | 102Sn | (6+) | | |-id=Tin-103 | rowspan=2|103Sn | rowspan=2 style="text-align:right" | 50 | rowspan=2 style="text-align:right" | 53 | rowspan=2|102.927960(17)[2] | rowspan=2 style="text-align:center" | 1981 | rowspan=2|7.0(2) s | β+ (98.8%) | 103In | rowspan=2|5/2+# | rowspan=2| | rowspan=2| |- | β+, p (1.2%) | 102Cd |-id=Tin-104 | 104Sn | style="text-align:right" | 50 | style="text-align:right" | 54 | 103.923105(6) | style="text-align:center" | 1985 | 20.8(5) s | β+ | 104In | 0+ | | |-id=Tin-105 | rowspan=2|105Sn | rowspan=2 style="text-align:right" | 50 | rowspan=2 style="text-align:right" | 55 | rowspan=2|104.921268(4) | rowspan=2 style="text-align:center" | 1981 | rowspan=2|32.7(5) s | β+ | 105In | rowspan=2|(5/2+) | rowspan=2| | rowspan=2| |- | β+, p (0.011%) | 104Cd |-id=Tin-106 | 106Sn | style="text-align:right" | 50 | style="text-align:right" | 56 | 105.916957(5) | style="text-align:center" | 1975 | 1.92(8) min | β+ | 106In | 0+ | | |-id=Tin-107 | 107Sn | style="text-align:right" | 50 | style="text-align:right" | 57 | 106.915714(6) | style="text-align:center" | 1976 | 2.90(5) min | β+ | 107In | (5/2+) | | |-id=Tin-108 | 108Sn | style="text-align:right" | 50 | style="text-align:right" | 58 | 107.911894(6) | style="text-align:center" | 1968 | 10.30(8) min | β+ | 108In | 0+ | | |-id=Tin-109 | 109Sn | style="text-align:right" | 50 | style="text-align:right" | 59 | 108.911293(9) | style="text-align:center" | 1965 | 18.1(2) min | β+ | 109In | 5/2+ | | |-id=Tin-110 | 110Sn | style="text-align:right" | 50 | style="text-align:right" | 60 | 109.907845(15) | style="text-align:center" | 1965 | 4.154(4) h | EC | 110In | 0+ | | |-id=Tin-111 | 111Sn | style="text-align:right" | 50 | style="text-align:right" | 61 | 110.907741(6) | style="text-align:center" | 1949 | 35.3(6) min | β+ | 111In | 7/2+ | | |-id=Tin-111m | style="text-indent:1em" | 111mSn | colspan="3" style="text-indent:2em" | 254.71(4) keV | style="text-align:center" | 1972 | 12.5(10) μs | IT | 111Sn | 1/2+ | | |-id=Tin-112 | 112Sn | style="text-align:right" | 50 | style="text-align:right" | 62 |111.9048249(3) | style="text-align:center" | 1927 | colspan=3 align=center|Observationally Stable[n 3] | 0+ | 0.0097(1) | |-id=Tin-113 | 113Sn | style="text-align:right" | 50 | style="text-align:right" | 63 |112.9051759(17) | style="text-align:center" | 1939 | 115.08(4) d | β+ | 113In | 1/2+ | | |-id=Tin-113m | rowspan=2 style="text-indent:1em" | 113mSn | rowspan=2 colspan="3" style="text-indent:2em" | 77.389(19) keV | rowspan=2 style="text-align:center" | 1960 | rowspan=2|21.4(4) min | IT (91.1%) | 113Sn | rowspan=2|7/2+ | rowspan=2| | rowspan=2| |- | β+ (8.9%) | 113In |-id=Tin-114 | 114Sn | style="text-align:right" | 50 | style="text-align:right" | 64 |113.90278013(3) | style="text-align:center" | 1927 | colspan=3 align=center|Stable | 0+ | 0.0066(1) | |-id=Tin-114m | style="text-indent:1em" | 114mSn | colspan="3" style="text-indent:2em" | 3087.37(7) keV | style="text-align:center" | 1975 | 733(14) ns | IT | 114Sn | 7− | | |-id=Tin-115 | 115Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 65 | 114.903344695(16) | style="text-align:center" | 1927 | colspan=3 align=center|Stable | 1/2+ | 0.0034(1) | |-id=Tin-115m1 | style="text-indent:1em" | 115m1Sn | colspan="3" style="text-indent:2em" | 612.81(4) keV | style="text-align:center" | 1967 | 3.26(8) μs | IT | 115Sn | 7/2+ | | |-id=Tin-115m2 | style="text-indent:1em" | 115m2Sn | colspan="3" style="text-indent:2em" | 713.64(12) keV | style="text-align:center" | 1964 | 159(1) μs | IT | 115Sn | 11/2− | | |-id=Tin-116 | 116Sn | style="text-align:right" | 50 | style="text-align:right" | 66 | 115.90174283(10) | style="text-align:center" | 1922 | colspan=3 align=center|Stable | 0+ | 0.1454(9) | |-id=Tin-116m1 | style="text-indent:1em" | 116m1Sn | colspan="3" style="text-indent:2em" | 2365.975(21) keV | style="text-align:center" | 1964 | 348(19) ns | IT | 116Sn | 5− | | |-id=Tin-116m2 | style="text-indent:1em" | 116m2Sn | colspan="3" style="text-indent:2em" | 3547.16(17) keV | style="text-align:center" | 1975 | 833(30) ns | IT | 116Sn | 10+ | | |-id=Tin-117 | 117Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 67 | 116.90295404(52) | style="text-align:center" | 1922 | colspan=3 align=center|Stable | 1/2+ | 0.0768(7) | |-id=Tin-117m1 | style="text-indent:1em" | 117m1Sn[n 4] | colspan="3" style="text-indent:2em" | 314.58(4) keV | style="text-align:center" | 1950 | 13.939(24) d | IT | 117Sn | 11/2− | | |-id=Tin-117m2 | style="text-indent:1em" | 117m2Sn | colspan="3" style="text-indent:2em" | 2406.4(4) keV | style="text-align:center" | 1979 | 1.75(7) μs | IT | 117Sn | (19/2+) | | |-id=Tin-118 | 118Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 68 | 117.90160663(54) | style="text-align:center" | 1922 | colspan=3 align=center|Stable | 0+ | 0.2422(9) | |-id=Tin-118m1 | style="text-indent:1em" | 118m1Sn | colspan="3" style="text-indent:2em" | 2574.91(4) keV | style="text-align:center" | 1960 | 230(10) ns | IT | 118Sn | 7− | | |-id=Tin-118m2 | style="text-indent:1em" | 118m2Sn | colspan="3" style="text-indent:2em" | 3108.06(22) keV | style="text-align:center" | 1980 | 2.52(6) μs | IT | 118Sn | (10+) | | |-id=Tin-119 | 119Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 69 | 118.90331127(78) | style="text-align:center" | 1922 | colspan=3 align=center|Stable | 1/2+ | 0.0859(4) | |-id=Tin-119m1 | style="text-indent:1em" | 119m1Sn[n 4] | colspan="3" style="text-indent:2em" | 89.531(13) keV | style="text-align:center" | 1950 | 293.1(7) d | IT | 119Sn | 11/2− | | |-id=Tin-119m2 | style="text-indent:1em" | 119m2Sn | colspan="3" style="text-indent:2em" | 2127.0(10) keV | style="text-align:center" | 1992 | 9.6(12) μs | IT | 119Sn | (19/2+) | | |-id=Tin-119m3 | style="text-indent:1em" | 119m3Sn | colspan="3" style="text-indent:2em" | 2369.0(3) keV | style="text-align:center" | 2016 | 96(9) ns | IT | 119Sn | 23/2+ | | |-id=Tin-120 | 120Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 70 | 119.90220256(99) | style="text-align:center" | 1922 | colspan=3 align=center|Stable | 0+ | 0.3258(9) | |-id=Tin-120m1 | style="text-indent:1em" | 120m1Sn | colspan="3" style="text-indent:2em" | 2481.63(6) keV | style="text-align:center" | 1958 | 11.8(5) μs | IT | 120Sn | 7− | | |-id=Tin-120m2 | style="text-indent:1em" | 120m2Sn | colspan="3" style="text-indent:2em" | 2902.22(22) keV | style="text-align:center" | 1986 | 6.26(11) μs | IT | 120Sn | 10+ | | |-id=Tin-121 | 121Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 71 | 120.9042435(11) | style="text-align:center" | 1948 | 27.03(4) h | β− | 121Sb | 3/2+ | | |-id=Tin-121m1 | rowspan=2 style="text-indent:1em" | 121m1Sn[n 4] | rowspan=2 colspan="3" style="text-indent:2em" | 6.31(6) keV | rowspan=2 style="text-align:center" | 1962 | rowspan=2|43.9(5) y | IT (77.6%) | 121Sn | rowspan=2| 11/2− | rowspan=2| | rowspan=2| |- | β− (22.4%) | 121Sb |-id=Tin-121m2 | style="text-indent:1em" | 121m2Sn | colspan="3" style="text-indent:2em" | 1998.68(13) keV | style="text-align:center" | 1992 | 5.3(5) μs | IT | 121Sn | 19/2+ | | |-id=Tin-121m3 | style="text-indent:1em" | 121m3Sn | colspan="3" style="text-indent:2em" | 2222.0(2) keV | style="text-align:center" | 2012 | 520(50) ns | IT | 121Sn | 23/2+ | | |-id=Tin-121m4 | style="text-indent:1em" | 121m4Sn | colspan="3" style="text-indent:2em" | 2833.9(2) keV | style="text-align:center" | 2012 | 167(25) ns | IT | 121Sn | 27/2− | | |-id=Tin-122 | 122Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 72 | 121.9034455(26) | style="text-align:center" | 1922 | colspan=3 align=center|Observationally Stable[n 5] | 0+ | 0.0463(3) | |-id=Tin-122m1 | style="text-indent:1em" | 122m1Sn | colspan="3" style="text-indent:2em" | 2409.03(4) keV | style="text-align:center" | 1979 | 7.5(9) μs | IT | 122Sn | 7− | | |-id=Tin-122m2 | style="text-indent:1em" | 122m2Sn | colspan="3" style="text-indent:2em" | 2765.5(3) keV | style="text-align:center" | 1992 | 62(3) μs | IT | 122Sn | 10+ | | |-id=Tin-122m3 | style="text-indent:1em" | 122m3Sn | colspan="3" style="text-indent:2em" | 4721.2(3) keV | style="text-align:center" | 2012 | 139(9) ns | IT | 122Sn | 15− | | |-id=Tin-123 | 123Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 73 | 122.9057271(27) | style="text-align:center" | 1948 | 129.2(4) d | β− | 123Sb | 11/2− | | |-id=Tin-123m1 | style="text-indent:1em" | 123m1Sn | colspan="3" style="text-indent:2em" | 24.6(4) keV | style="text-align:center" | 1948 | 40.06(1) min | β− | 123Sb | 3/2+ | | |-id=Tin-123m2 | style="text-indent:1em" | 123m2Sn | colspan="3" style="text-indent:2em" | 1944.90(12) keV | style="text-align:center" | 1992 | 7.4(26) μs | IT | 123Sn | 19/2+ | | |-id=Tin-123m3 | style="text-indent:1em" | 123m3Sn | colspan="3" style="text-indent:2em" | 2152.66(19) keV | style="text-align:center" | 1994 | 6 μs | IT | 123Sn | 23/2+ | | |-id=Tin-123m4 | style="text-indent:1em" | 123m4Sn | colspan="3" style="text-indent:2em" | 2712.47(21) keV | style="text-align:center" | 1994 | 34 μs | IT | 123Sn | 27/2− | | |-id=Tin-124 | 124Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 74 | 123.9052796(14) | style="text-align:center" | 1922 | colspan=3 align=center|Observationally Stable[n 6] | 0+ | 0.0579(5) | |-id=Tin-124m1 | style="text-indent:1em" | 124m1Sn | colspan="3" style="text-indent:2em" | 2204.620(23) keV | style="text-align:center" | 1979 | 270(60) ns | IT | 124Sn | 5- | | |-id=Tin-124m2 | style="text-indent:1em" | 124m2Sn | colspan="3" style="text-indent:2em" | 2324.96(4) keV | style="text-align:center" | 1979 | 3.1(5) μs | IT | 124Sn | 7− | | |-id=Tin-124m3 | style="text-indent:1em" | 124m3Sn | colspan="3" style="text-indent:2em" | 2656.6(3) keV | style="text-align:center" | 1992 | 51(3) μs | IT | 124Sn | 10+ | | |-id=Tin-124m4 | style="text-indent:1em" | 124m4Sn | colspan="3" style="text-indent:2em" | 4552.4(3) keV | style="text-align:center" | 2012 | 260(25) ns | IT | 124Sn | 15− | | |-id=Tin-125 | 125Sn[n 4] | style="text-align:right" | 50 | style="text-align:right" | 75 | 124.9077894(14) | style="text-align:center" | 1939 | 9.634(15) d | β− | 125Sb | 11/2− | | |-id=Tin-125m1 | style="text-indent:1em" | 125m1Sn | colspan="3" style="text-indent:2em" | 27.50(14) keV | style="text-align:center" | 1949 | 9.77(25) min | β− | 125Sb | 3/2+ | | |-id=Tin-125m2 | style="text-indent:1em" | 125m2Sn | colspan="3" style="text-indent:2em" | 1892.8(3) keV | style="text-align:center" | 2000 | 6.2(2) μs | IT | 125Sn | 19/2+ | | |-id=Tin-125m3 | style="text-indent:1em" | 125m3Sn | colspan="3" style="text-indent:2em" | 2059.5(4) keV | style="text-align:center" | 2008 | 650(60) ns | IT | 125Sn | 23/2+ | | |-id=Tin-125m4 | style="text-indent:1em" | 125m4Sn | colspan="3" style="text-indent:2em" | 2623.5(5) keV | style="text-align:center" | 2000 | 230(17) ns | IT | 125Sn | 27/2− | | |-id=Tin-126 | 126Sn[n 7] | style="text-align:right" | 50 | style="text-align:right" | 76 | 125.907658(11) | style="text-align:center" | 1962 | 2.30(14)×105 y | β− | 126m1Sb[3] | 0+ | < 10−14[4] | |-id=Tin-126m1 | style="text-indent:1em" | 126m1Sn | colspan="3" style="text-indent:2em" | 2218.99(8) keV | style="text-align:center" | 1979 | 6.1(7) μs | IT | 126Sn | 7− | | |-id=Tin-126m2 | style="text-indent:1em" | 126m2Sn | colspan="3" style="text-indent:2em" | 2564.5(5) keV | style="text-align:center" | 2000 | 7.6(3) μs | IT | 126Sn | 10+ | | |-id=Tin-126m3 | style="text-indent:1em" | 126m3Sn | colspan="3" style="text-indent:2em" | 4347.4(4) keV | style="text-align:center" | 2012 | 114(2) ns | IT | 126Sn | 15− | | |-id=Tin-127 | 127Sn | style="text-align:right" | 50 | style="text-align:right" | 77 | 126.9103917(99) | style="text-align:center" | 1951 | 2.10(4) h | β− | 127Sb | 11/2− | | |-id=Tin-127m1 | style="text-indent:1em" | 127m1Sn | colspan="3" style="text-indent:2em" | 5.07(6) keV | style="text-align:center" | 1962 | 4.13(3) min | β− | 127Sb | 3/2+ | | |-id=Tin-127m2 | style="text-indent:1em" | 127m2Sn | colspan="3" style="text-indent:2em" | 1826.67(16) keV | style="text-align:center" | 1980 | 4.52(15) μs | IT | 127Sn | 19/2+ | | |-id=Tin-127m3 | style="text-indent:1em" | 127m3Sn | colspan="3" style="text-indent:2em" | 1930.97(17) keV | style="text-align:center" | 2004 | 1.26(15) μs | IT | 127Sn | (23/2+) | | |-id=Tin-127m4 | style="text-indent:1em" | 127m4Sn | colspan="3" style="text-indent:2em" | 2552.4(10) keV | style="text-align:center" | 2008 | 250(30) ns | IT | 127Sn | (27/2−) | | |-id=Tin-128 | 128Sn | style="text-align:right" | 50 | style="text-align:right" | 78 | 127.910508(19) | style="text-align:center" | 1956 | 59.07(14) min | β− | 128Sb | 0+ | | |-id=Tin-128m1 | style="text-indent:1em" | 128m1Sn | colspan="3" style="text-indent:2em" | 2091.50(11) keV | style="text-align:center" | 1979 | 6.5(5) s | IT | 128Sn | 7− | | |-id=Tin-128m2 | style="text-indent:1em" | 128m2Sn | colspan="3" style="text-indent:2em" | 2491.91(17) keV | style="text-align:center" | 1981 | 2.91(14) μs | IT | 128Sn | 10+ | | |-id=Tin-128m3 | style="text-indent:1em" | 128m3Sn | colspan="3" style="text-indent:2em" | 4099.5(4) keV | style="text-align:center" | 2011 | 220(30) ns | IT | 128Sn | (15−) | | |-id=Tin-129 | 129Sn | style="text-align:right" | 50 | style="text-align:right" | 79 | 128.913482(19) | style="text-align:center" | 1962 | 2.23(4) min | β− | 129Sb | 3/2+ | | |-id=Tin-129m1 | style="text-indent:1em" | 129m1Sn | colspan="3" style="text-indent:2em" | 35.15(5) keV | style="text-align:center" | 1966 | 6.9(1) min | β− | 129Sb | 11/2− | | |-id=Tin-129m2 | style="text-indent:1em" | 129m2Sn | colspan="3" style="text-indent:2em" | 1761.6(10) keV | style="text-align:center" | 1980 | 3.49(11) μs | IT | 129Sn | (19/2+) | | |-id=Tin-129m3 | style="text-indent:1em" | 129m3Sn | colspan="3" style="text-indent:2em" | 1802.6(10) keV | style="text-align:center" | 2002 | 2.22(13) μs | IT | 129Sn | 23/2+ | | |-id=Tin-129m4 | style="text-indent:1em" | 129m4Sn | colspan="3" style="text-indent:2em" | 2552.9(11) keV | style="text-align:center" | 2008 | 221(18) ns | IT | 129Sn | (27/2−) | | |-id=Tin-130 | 130Sn | style="text-align:right" | 50 | style="text-align:right" | 80 |129.9139745(20) | style="text-align:center" | 1972 | 3.72(7) min | β− | 130Sb | 0+ | | |-id=Tin-130m1 | style="text-indent:1em" | 130m1Sn | colspan="3" style="text-indent:2em" | 1946.88(10) keV | style="text-align:center" | 1974 | 1.7(1) min | β− | 130Sb | 7− | | |-id=Tin-130m2 | style="text-indent:1em" | 130m2Sn | colspan="3" style="text-indent:2em" | 2434.79(12) keV | style="text-align:center" | 1981 | 1.501(17) μs | IT | 130Sn | (10+) | | |-id=Tin-131 | 131Sn | style="text-align:right" | 50 | style="text-align:right" | 81 | 130.917053(4) | style="text-align:center" | 1963 | 56.0(5) s | β− | 131Sb | 3/2+ | | |-id=Tin-131m1 | rowspan=2 style="text-indent:1em" | 131m1Sn | rowspan=2 colspan="3" style="text-indent:2em" | 65.1(3) keV | rowspan=2 style="text-align:center" | 1977 | rowspan=2|58.4(5) s | β− | 131Sb | rowspan=2|11/2− | rowspan=2| | rowspan=2| |- | IT? | 131Sn |-id=Tin-131m2 | style="text-indent:1em" | 131m2Sn | colspan="3" style="text-indent:2em" | 4670.0(4) keV | style="text-align:center" | 1984 | 316(5) ns | IT | 131Sn | (23/2−) | | |-id=Tin-132 | 132Sn | style="text-align:right" | 50 | style="text-align:right" | 82 | 131.9178239(21) | style="text-align:center" | 1963 | 39.7(8) s | β− | 132Sb | 0+ | | |-id=Tin-132m | style="text-indent:1em" | 132mSn | colspan="3" style="text-indent:2em" | 4848.52(20) keV | style="text-align:center" | 1982 | 2.080(16) μs | IT | 132Sn | 8+ | | |-id=Tin-133 | rowspan=2|133Sn | rowspan=2 style="text-align:right" | 50 | rowspan=2 style="text-align:right" | 83 | rowspan=2|132.9239138(20) | rowspan=2 style="text-align:center" | 1973 | rowspan=2|1.37(7) s | β− (99.97%) | 133Sb | rowspan=2|7/2− | rowspan=2| | rowspan=2| |- | β−n (.0294%) | 132Sb |-id=Tin-134 | rowspan=2|134Sn | rowspan=2 style="text-align:right" | 50 | rowspan=2 style="text-align:right" | 84 | rowspan=2| 133.928680(3) | rowspan=2 style="text-align:center" | 1974 | rowspan=2| 0.93(8) s | β− (83%) | 134Sb | rowspan=2|0+ | rowspan=2| | rowspan=2| |- | β−n (17%) | 133Sb |-id=Tin-134m | style="text-indent:1em" | 134mSn | colspan="3" style="text-indent:2em" | 1247.4(5) keV | style="text-align:center" | (2000)[n 8] | 87(8) ns | IT | 134Sn | 6+ | | |-id=Tin-135 | rowspan=3|135Sn | rowspan=3 style="text-align:right" | 50 | rowspan=3 style="text-align:right" | 85 | rowspan=3| 134.934909(3) | rowspan=3 style="text-align:center" | 1994 | rowspan=3|515(5) ms | β− (79%) | 135Sb | rowspan=3|7/2−# | rowspan=3| | rowspan=3| |- | β−n (21%) | 134Sb |- | β−2n? | 133Sb |-id=Tin-136 | rowspan=3|136Sn | rowspan=3 style="text-align:right" | 50 | rowspan=3 style="text-align:right" | 86 | rowspan=3| 135.93970(22)# | rowspan=3 style="text-align:center" | 1994 | rowspan=3|355(18) ms | β− (72%) | 136Sb | rowspan=3|0+ | rowspan=3| | rowspan=3| |- | β−n (28%) | 135Sb |- | β−2n? | 134Sb |-id=Tin-137 | rowspan=3|137Sn | rowspan=3 style="text-align:right" | 50 | rowspan=3 style="text-align:right" | 87 | rowspan=3|136.94616(32)# | rowspan=3 style="text-align:center" | 1994 | rowspan=3|249(15) ms | β− (52%) | 137Sb | rowspan=3|5/2−# | rowspan=3| | rowspan=3| |- | β−n (48%) | 136Sb |- | β−2n? | 135Sb |-id=Tin-138 | rowspan=3|138Sn | rowspan=3 style="text-align:right" | 50 | rowspan=3 style="text-align:right" | 88 | rowspan=3|137.95114(43)# | rowspan=3 style="text-align:center" | 2010 | rowspan=3|148(9) ms | β− (64%) | 138Sb | rowspan=3|0+ | rowspan=3| | rowspan=3| |- | β−n (36%) | 137Sb |- | β−2n? | 136Sb |-id=Tin-138m | style="text-indent:1em" | 138mSn | colspan="3" style="text-indent:2em" | 1344(2) keV | style="text-align:center" | 2014 | 210(45) ns | IT | 138Sn | (6+) | | |-id=Tin-139 | rowspan=3|139Sn | rowspan=3 style="text-align:right" | 50 | rowspan=3 style="text-align:right" | 89 | rowspan=3|138.95780(43)# | rowspan=3 style="text-align:center" | 2015 | rowspan=3|120(38) ms | β− | 139Sb | rowspan=3|5/2−# | rowspan=3| | rowspan=3| |- | β−n? | 138Sb |- | β−2n? | 137Sb |-id=Tin-140 |rowspan=3| 140Sn |rowspan=3 style="text-align:right" | 50 |rowspan=3 style="text-align:right" | 90 |rowspan=3| 139.96297(32)# |rowspan=3 style="text-align:center" | 2018 |rowspan=3| 50# ms
[>550 ns] |β−? |140Sb |rowspan=3|0+ |rowspan=3| |rowspan=3| |- |β−n? |139Sb |- |β−2n? |138Sb Template:Isotopes table/footer

Tin-117m

Tin-117m is a radioisotope of tin. One of its uses is in a particulate suspension to treat canine synovitis (radiosynoviorthesis).[5]

Tin-121m

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155Eu Template:Fsp4.74 Template:Fsp0.0803[a 3] 252 βγ
85Kr 10.73 Template:Fsp0.2180[a 4] 687 βγ
113mCd 13.9Template:Fsp Template:Fsp0.0008[a 3] 316 β
90Sr 28.91 4.505Template:Fsp 2826[a 5] β
137Cs 30.04 6.337Template:Fsp 1176 βγ
121mSn 43.9Template:Fsp 0.00005Template:Fsp 390 βγ
151Sm 94.6Template:Fsp 0.5314[a 3] 77 β
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  1. ^ Decay energy is split among β, neutrino, and γ if any.
  2. ^ Per 65 thermal neutron fissions of 235U and 35 of 239Pu.
  3. ^ a b c Neutron poison; in thermal reactors, most is destroyed by further neutron capture.
  4. ^ Less than 1/4 of mass-85 fission products as most bypass ground state: 85Br → 85mKr → 85Rb.
  5. ^ Has decay energy 546 keV; its decay product 90Y has decay energy 2.28 MeV with weak gamma branching.

Tin-121m (121mSn) is a nuclear isomer of tin with a half-life of 43.9 years, making it technically a medium-lived fission product.

In a normal thermal reactor, it has a very low fission product yield; thus, this isotope is not a significant contributor to nuclear waste. Fast fission or fission of some heavier actinides will produce it at higher yields. For example, its yield from uranium-235 is 0.0007% per thermal fission and 0.002% per fast fission.[6]

Tin-126

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Nuclide tPage Template:Fraction/styles.css has no content.1⁄2 Yield Q[a 1] βγ
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99Tc 0.211 6.1385 294 β
126Sn 0.23Template:Fsp 0.1084 4050[a 3] βγ
79Se 0.33Template:Fsp 0.0447 151 β
135Cs 1.33Template:Fsp 6.9110[a 4] 269 β
93Zr 1.61Template:Fsp 5.4575 91 βγ
107Pd 6.5Template:Fsp 1.2499 33 β
129I 16.1Template:Fsp 0.8410 194 βγ
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  1. ^ Decay energy is split among β, neutrino, and γ if any.
  2. ^ Per 65 thermal neutron fissions of 235U and 35 of 239Pu.
  3. ^ Has decay energy 380 keV, but its decay product 126Sb has decay energy 3.67 MeV.
  4. ^ Lower in thermal reactors because 135Xe, its predecessor, readily absorbs neutrons.

Tin-126 is a radioisotope of tin and one of the only seven long-lived fission products. While tin-126's half-life of 230,000 years means a relatively low specific activity, its short-lived decay products, two isomers of antimony-126, emit a cascade of hard gamma radiation - at least 3 photons above 400 keV per decay - before reaching stable tellurium-126, making it a possible external exposure hazard, which the other long-lived fission products are not by comparison.

Tin-126 is in the middle of the mass range for fission products, so its yield is fairly low (but still dominates that for the element tin). Fission of the common fuels such as 235U and 239Pu into unequal halves is preferred, especially with thermal neutrons, as used in almost all current nuclear power plants.

Yield, % per fission[6]
Thermal Fast 14 MeV
232Th not fissile 0.0481 ± 0.0077 0.87 ± 0.20
233U 0.224 ± 0.018 0.278 ± 0.022 1.92 ± 0.31
235U 0.056 ± 0.004 0.0137 ± 0.001 1.70 ± 0.14
238U not fissile 0.054 ± 0.004 1.31 ± 0.21
239Pu 0.199 ± 0.016 0.26 ± 0.02 2.02 ± 0.22
241Pu 0.082 ± 0.019 0.22 ± 0.03 ?

See also

Daughter products other than tin

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content.Suzuki, H.; Fukuda, N.; Takeda, H.; et al. (2025). "Discovery of 98Sn produced by the projectile fragmentation of a 345-MeV/nucleon 124Xe beam". Progress of Theoretical and Experimental Physics (ptaf051) 053D02. doi:10.1093/ptep/ptaf051.
  2. ^ a b Page Module:Citation/CS1/styles.css has no content.Nies, L.; Atanasov, D.; Athanasakis-Kaklamanakis, M.; Au, M.; Bernerd, C.; Blaum, K.; Chrysalidis, K.; Fischer, P.; Heinke, R.; Klink, C.; Lange, D.; Lunney, D.; Manea, V.; Marsh, B. A.; Müller, M.; Mougeot, M.; Naimi, S.; Schweiger, Ch.; Schweikhard, L.; Wienholtz, F. (9 January 2025). "Refining the nuclear mass surface with the mass of Sn 103". Physical Review C. 111 (1) 014315. doi:10.1103/PhysRevC.111.014315.
  3. ^ ENSDF analysis available at Template:NNDC
  4. ^ Page Module:Citation/CS1/styles.css has no content.Shen, Hongtao; Jiang, Shan; He, Ming; Dong, Kejun; Li, Chaoli; He, Guozhu; Wu, Shaolei; Gong, Jie; Lu, Liyan; Li, Shizhuo; Zhang, Dawei; Shi, Guozhu; Huang, Chuntang; Wu, Shaoyong (February 2011). "Study on measurement of fission product nuclide 126Sn by AMS" (PDF). Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 269 (3): 392–395. doi:10.1016/j.nimb.2010.11.059.
  5. ^ Page Module:Citation/CS1/styles.css has no content."Procedure for Use of Synovetin OA" (PDF). nrc.gov.
  6. ^ a b M. B. Chadwick et al, "Evaluated Nuclear Data File (ENDF) : ENDF/B-VII.1: Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields, and Decay Data", Nucl. Data Sheets 112(2011)2887. (accessed at https://www-nds.iaea.org/exfor/endf.htm)

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