Isotopes of tin

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 have not been observed to decay. 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

|-id=Tin-98 | ⁹⁸Sn | style="text-align:right" | 50 | style="text-align:right" | 48 | | | | | 0+ | | |-id=Tin-99 | rowspan=2|⁹⁹Sn | rowspan=2 style="text-align:right" | 50 | rowspan=2 style="text-align:right" | 49 | rowspan=2|98.94850(63)# | rowspan=2|24(4)&nbsp;ms | β⁺ (95%) | ⁹⁹In | rowspan=2|9/2+# | rowspan=2| | rowspan=2| |- | β⁺, p (5%) | ⁹⁸Cd |-id=Tin-100 | rowspan=2|¹⁰⁰Sn | rowspan=2 style="text-align:right" | 50 | rowspan=2 style="text-align:right" | 50 | rowspan=2|99.93865(26) | rowspan=2|1.18(8)&nbsp;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)# | rowspan=2|2.22(5)&nbsp;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) | 3.8(2)&nbsp;s | β⁺ | ¹⁰²In | 0+ | | |-id=Tin-102m | style="text-indent:1em" | ^102mSn | colspan="3" style="text-indent:2em" | 2017(2)&nbsp;keV | 367(8)&nbsp;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) | rowspan=2|7.0(2)&nbsp;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) | 20.8(5)&nbsp;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|32.7(5)&nbsp;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) | 1.92(8)&nbsp;min | β⁺ | ¹⁰⁶In | 0+ | | |-id=Tin-107 | ¹⁰⁷Sn | style="text-align:right" | 50 | style="text-align:right" | 57 | 106.915714(6) | 2.90(5)&nbsp;min | β⁺ | ¹⁰⁷In | (5/2+) | | |-id=Tin-108 | ¹⁰⁸Sn | style="text-align:right" | 50 | style="text-align:right" | 58 | 107.911894(6) | 10.30(8)&nbsp;min | β⁺ | ¹⁰⁸In | 0+ | | |-id=Tin-109 | ¹⁰⁹Sn | style="text-align:right" | 50 | style="text-align:right" | 59 | 108.911293(9) | 18.1(2)&nbsp;min | β⁺ | ¹⁰⁹In | 5/2+ | | |-id=Tin-110 | ¹¹⁰Sn | style="text-align:right" | 50 | style="text-align:right" | 60 | 109.907845(15) | 4.154(4)&nbsp;h | EC | ¹¹⁰In | 0+ | | |-id=Tin-111 | ¹¹¹Sn | style="text-align:right" | 50 | style="text-align:right" | 61 | 110.907741(6) | 35.3(6)&nbsp;min | β⁺ | ¹¹¹In | 7/2+ | | |-id=Tin-111m | style="text-indent:1em" | ^111mSn | colspan="3" style="text-indent:2em" | 254.71(4)&nbsp;keV | 12.5(10)&nbsp;μs | IT | ¹¹¹Sn | 1/2+ | | |-id=Tin-112 | ¹¹²Sn | style="text-align:right" | 50 | style="text-align:right" | 62 |111.9048249(3) | colspan=3 align=center|Observationally Stable | 0+ | 0.0097(1) | |-id=Tin-113 | ¹¹³Sn | style="text-align:right" | 50 | style="text-align:right" | 63 |112.9051759(17) | 115.08(4)&nbsp;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)&nbsp;keV | rowspan=2|21.4(4)&nbsp;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) | 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)&nbsp;keV | 733(14)&nbsp;ns | IT | ¹¹⁴Sn | 7− | | |-id=Tin-115 | ¹¹⁵Sn | style="text-align:right" | 50 | style="text-align:right" | 65 | 114.903344695(16) | 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)&nbsp;keV | 3.26(8)&nbsp;μs | IT | ¹¹⁵Sn | 7/2+ | | |-id=Tin-115m2 | style="text-indent:1em" | ^115m2Sn | colspan="3" style="text-indent:2em" | 713.64(12)&nbsp;keV | 159(1)&nbsp;μs | IT | ¹¹⁵Sn | 11/2− | | |-id=Tin-116 | ¹¹⁶Sn | style="text-align:right" | 50 | style="text-align:right" | 66 | 115.90174283(10) | 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)&nbsp;keV | 348(19)&nbsp;ns | IT | ¹¹⁶Sn | 5− | | |-id=Tin-116m2 | style="text-indent:1em" | ^116m2Sn | colspan="3" style="text-indent:2em" | 3547.16(17)&nbsp;keV | 833(30)&nbsp;ns | IT | ¹¹⁶Sn | 10+ | | |-id=Tin-117 | ¹¹⁷Sn | style="text-align:right" | 50 | style="text-align:right" | 67 | 116.90295404(52) | colspan=3 align=center|Stable | 1/2+ | 0.0768(7) | |- | style="text-indent:1em" | ^117m1Sn | colspan="3" style="text-indent:2em" | 314.58(4)&nbsp;keV | 13.939(24)&nbsp;d | IT | ¹¹⁷Sn | 11/2− | | |-id=Tin-117m2 | style="text-indent:1em" | ^117m2Sn | colspan="3" style="text-indent:2em" | 2406.4(4)&nbsp;keV | 1.75(7)&nbsp;μs | IT | ¹¹⁷Sn | (19/2+) | | |-id=Tin-118 | ¹¹⁸Sn | style="text-align:right" | 50 | style="text-align:right" | 68 | 117.90160663(54) | 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)&nbsp;keV | 230(10)&nbsp;ns | IT | ¹¹⁸Sn | 7− | | |-id=Tin-118m2 | style="text-indent:1em" | ^118m2Sn | colspan="3" style="text-indent:2em" | 3108.06(22)&nbsp;keV | 2.52(6)&nbsp;μs | IT | ¹¹⁸Sn | (10+) | | |-id=Tin-119 | ¹¹⁹Sn | style="text-align:right" | 50 | style="text-align:right" | 69 | 118.90331127(78) | colspan=3 align=center|Stable | 1/2+ | 0.0859(4) | |-id=Tin-119m1 | style="text-indent:1em" | ^119m1Sn | colspan="3" style="text-indent:2em" | 89.531(13)&nbsp;keV | 293.1(7)&nbsp;d | IT | ¹¹⁹Sn | 11/2− | | |-id=Tin-119m2 | style="text-indent:1em" | ^119m2Sn | colspan="3" style="text-indent:2em" | 2127.0(10)&nbsp;keV | 9.6(12)&nbsp;μs | IT | ¹¹⁹Sn | (19/2+) | | |-id=Tin-119m3 | style="text-indent:1em" | ^119m3Sn | colspan="3" style="text-indent:2em" | 2369.0(3)&nbsp;keV | 96(9)&nbsp;ns | IT | ¹¹⁹Sn | 23/2+ | | |-id=Tin-120 | ¹²⁰Sn | style="text-align:right" | 50 | style="text-align:right" | 70 | 119.90220256(99) | 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)&nbsp;keV | 11.8(5)&nbsp;μs | IT | ¹²⁰Sn | 7− | | |-id=Tin-120m2 | style="text-indent:1em" | ^120m2Sn | colspan="3" style="text-indent:2em" | 2902.22(22)&nbsp;keV | 6.26(11)&nbsp;μs | IT | ¹²⁰Sn | 10+ | | |-id=Tin-121 | ¹²¹Sn | style="text-align:right" | 50 | style="text-align:right" | 71 | 120.9042435(11) | 27.03(4)&nbsp;h | β^− | ¹²¹Sb | 3/2+ | | |- | rowspan=2 style="text-indent:1em" | ^121m1Sn | rowspan=2 colspan="3" style="text-indent:2em" | 6.31(6)&nbsp;keV | rowspan=2|43.9(5)&nbsp;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)&nbsp;keV | 5.3(5)&nbsp;μs | IT | ¹²¹Sn | 19/2+ | | |-id=Tin-121m3 | style="text-indent:1em" | ^121m3Sn | colspan="3" style="text-indent:2em" | 2222.0(2)&nbsp;keV | 520(50)&nbsp;ns | IT | ¹²¹Sn | 23/2+ | | |-id=Tin-121m4 | style="text-indent:1em" | ^121m4Sn | colspan="3" style="text-indent:2em" | 2833.9(2)&nbsp;keV | 167(25)&nbsp;ns | IT | ¹²¹Sn | 27/2− | | |-id=Tin-122 | ¹²²Sn | style="text-align:right" | 50 | style="text-align:right" | 72 | 121.9034455(26) | colspan=3 align=center|Observationally Stable | 0+ | 0.0463(3) | |-id=Tin-122m1 | style="text-indent:1em" | ^122m1Sn | colspan="3" style="text-indent:2em" | 2409.03(4)&nbsp;keV | 7.5(9)&nbsp;μs | IT | ¹²²Sn | 7− | | |-id=Tin-122m2 | style="text-indent:1em" | ^122m2Sn | colspan="3" style="text-indent:2em" | 2765.5(3)&nbsp;keV | 62(3)&nbsp;μs | IT | ¹²²Sn | 10+ | | |-id=Tin-122m3 | style="text-indent:1em" | ^122m3Sn | colspan="3" style="text-indent:2em" | 4721.2(3)&nbsp;keV | 139(9)&nbsp;ns | IT | ¹²²Sn | 15− | | |-id=Tin-123 | ¹²³Sn | style="text-align:right" | 50 | style="text-align:right" | 73 | 122.9057271(27) | 129.2(4)&nbsp;d | β^− | ¹²³Sb | 11/2− | | |-id=Tin-123m1 | style="text-indent:1em" | ^123m1Sn | colspan="3" style="text-indent:2em" | 24.6(4)&nbsp;keV | 40.06(1)&nbsp;min | β^− | ¹²³Sb | 3/2+ | | |-id=Tin-123m2 | style="text-indent:1em" | ^123m2Sn | colspan="3" style="text-indent:2em" | 1944.90(12)&nbsp;keV | 7.4(26)&nbsp;μs | IT | ¹²³Sn | 19/2+ | | |-id=Tin-123m3 | style="text-indent:1em" | ^123m3Sn | colspan="3" style="text-indent:2em" | 2152.66(19)&nbsp;keV | 6&nbsp;μs | IT | ¹²³Sn | 23/2+ | | |-id=Tin-123m4 | style="text-indent:1em" | ^123m4Sn | colspan="3" style="text-indent:2em" | 2712.47(21)&nbsp;keV | 34&nbsp;μs | IT | ¹²³Sn | 27/2− | | |-id=Tin-124 | ¹²⁴Sn | style="text-align:right" | 50 | style="text-align:right" | 74 | 123.9052796(14) | colspan=3 align=center|Observationally Stable | 0+ | 0.0579(5) | |-id=Tin-124m1 | style="text-indent:1em" | ^124m1Sn | colspan="3" style="text-indent:2em" | 2204.620(23)&nbsp;keV | 270(60)&nbsp;ns | IT | ¹²⁴Sn | 5- | | |-id=Tin-124m2 | style="text-indent:1em" | ^124m2Sn | colspan="3" style="text-indent:2em" | 2324.96(4)&nbsp;keV | 3.1(5)&nbsp;μs | IT | ¹²⁴Sn | 7− | | |-id=Tin-124m3 | style="text-indent:1em" | ^124m3Sn | colspan="3" style="text-indent:2em" | 2656.6(3)&nbsp;keV | 51(3)&nbsp;μs | IT | ¹²⁴Sn | 10+ | | |-id=Tin-124m4 | style="text-indent:1em" | ^124m4Sn | colspan="3" style="text-indent:2em" | 4552.4(3)&nbsp;keV | 260(25)&nbsp;ns | IT | ¹²⁴Sn | 15− | | |-id=Tin-125 | ¹²⁵Sn | style="text-align:right" | 50 | style="text-align:right" | 75 | 124.9077894(14) | 9.634(15)&nbsp;d | β^− | ¹²⁵Sb | 11/2− | | |-id=Tin-125m1 | style="text-indent:1em" | ^125m1Sn | colspan="3" style="text-indent:2em" | 27.50(14)&nbsp;keV | 9.77(25)&nbsp;min | β^− | ¹²⁵Sb | 3/2+ | | |-id=Tin-125m2 | style="text-indent:1em" | ^125m2Sn | colspan="3" style="text-indent:2em" | 1892.8(3)&nbsp;keV | 6.2(2)&nbsp;μs | IT | ¹²⁵Sn | 19/2+ | | |-id=Tin-125m3 | style="text-indent:1em" | ^125m3Sn | colspan="3" style="text-indent:2em" | 2059.5(4)&nbsp;keV | 650(60)&nbsp;ns | IT | ¹²⁵Sn | 23/2+ | | |-id=Tin-125m4 | style="text-indent:1em" | ^125m4Sn | colspan="3" style="text-indent:2em" | 2623.5(5)&nbsp;keV | 230(17)&nbsp;ns | IT | ¹²⁵Sn | 27/2− | | |- | ¹²⁶Sn | style="text-align:right" | 50 | style="text-align:right" | 76 | 125.907658(11) | 2.30(14)×10⁵ y | β^− | ^126m1Sb | 0+ | < 10^{−14} | |-id=Tin-126m1 | style="text-indent:1em" | ^126m1Sn | colspan="3" style="text-indent:2em" | 2218.99(8)&nbsp;keV | 6.1(7)&nbsp;μs | IT | ¹²⁶Sn | 7− | | |-id=Tin-126m2 | style="text-indent:1em" | ^126m2Sn | colspan="3" style="text-indent:2em" | 2564.5(5)&nbsp;keV | 7.6(3)&nbsp;μs | IT | ¹²⁶Sn | 10+ | | |-id=Tin-126m3 | style="text-indent:1em" | ^126m3Sn | colspan="3" style="text-indent:2em" | 4347.4(4)&nbsp;keV | 114(2)&nbsp;ns | IT | ¹²⁶Sn | 15− | | |-id=Tin-127 | ¹²⁷Sn | style="text-align:right" | 50 | style="text-align:right" | 77 | 126.9103917(99) | 2.10(4)&nbsp;h | β^− | ¹²⁷Sb | 11/2− | | |-id=Tin-127m1 | style="text-indent:1em" | ^127m1Sn | colspan="3" style="text-indent:2em" | 5.07(6)&nbsp;keV | 4.13(3)&nbsp;min | β^− | ¹²⁷Sb | 3/2+ | | |-id=Tin-127m2 | style="text-indent:1em" | ^127m2Sn | colspan="3" style="text-indent:2em" | 1826.67(16)&nbsp;keV | 4.52(15)&nbsp;μs | IT | ¹²⁷Sn | 19/2+ | | |-id=Tin-127m3 | style="text-indent:1em" | ^127m3Sn | colspan="3" style="text-indent:2em" | 1930.97(17)&nbsp;keV | 1.26(15)&nbsp;μs | IT | ¹²⁷Sn | (23/2+) | | |-id=Tin-127m4 | style="text-indent:1em" | ^127m4Sn | colspan="3" style="text-indent:2em" | 2552.4(10)&nbsp;keV | 250(30)&nbsp;ns | IT | ¹²⁷Sn | (27/2−) | | |-id=Tin-128 | ¹²⁸Sn | style="text-align:right" | 50 | style="text-align:right" | 78 | 127.910508(19) | 59.07(14)&nbsp;min | β^− | ¹²⁸Sb | 0+ | | |-id=Tin-128m1 | style="text-indent:1em" | ^128m1Sn | colspan="3" style="text-indent:2em" | 2091.50(11)&nbsp;keV | 6.5(5)&nbsp;s | IT | ¹²⁸Sn | 7− | | |-id=Tin-128m2 | style="text-indent:1em" | ^128m2Sn | colspan="3" style="text-indent:2em" | 2491.91(17)&nbsp;keV | 2.91(14)&nbsp;μs | IT | ¹²⁸Sn | 10+ | | |-id=Tin-128m3 | style="text-indent:1em" | ^128m3Sn | colspan="3" style="text-indent:2em" | 4099.5(4)&nbsp;keV | 220(30)&nbsp;ns | IT | ¹²⁸Sn | (15−) | | |-id=Tin-129 | ¹²⁹Sn | style="text-align:right" | 50 | style="text-align:right" | 79 | 128.913482(19) | 2.23(4)&nbsp;min | β^− | ¹²⁹Sb | 3/2+ | | |-id=Tin-129m1 | style="text-indent:1em" | ^129m1Sn | colspan="3" style="text-indent:2em" | 35.15(5)&nbsp;keV | 6.9(1)&nbsp;min | β^− | ¹²⁹Sb | 11/2− | | |-id=Tin-129m2 | style="text-indent:1em" | ^129m2Sn | colspan="3" style="text-indent:2em" | 1761.6(10)&nbsp;keV | 3.49(11)&nbsp;μs | IT | ¹²⁹Sn | (19/2+) | | |-id=Tin-129m3 | style="text-indent:1em" | ^129m3Sn | colspan="3" style="text-indent:2em" | 1802.6(10)&nbsp;keV | 2.22(13)&nbsp;μs | IT | ¹²⁹Sn | 23/2+ | | |-id=Tin-129m4 | style="text-indent:1em" | ^129m4Sn | colspan="3" style="text-indent:2em" | 2552.9(11)&nbsp;keV | 221(18)&nbsp;ns | IT | ¹²⁹Sn | (27/2−) | | |-id=Tin-130 | ¹³⁰Sn | style="text-align:right" | 50 | style="text-align:right" | 80 |129.9139745(20) | 3.72(7)&nbsp;min | β^− | ¹³⁰Sb | 0+ | | |-id=Tin-130m1 | style="text-indent:1em" | ^130m1Sn | colspan="3" style="text-indent:2em" | 1946.88(10)&nbsp;keV | 1.7(1)&nbsp;min | β^− | ¹³⁰Sb | 7− | | |-id=Tin-130m2 | style="text-indent:1em" | ^130m2Sn | colspan="3" style="text-indent:2em" | 2434.79(12)&nbsp;keV | 1.501(17)&nbsp;μs | IT | ¹³⁰Sn | (10+) | | |-id=Tin-131 | ¹³¹Sn | style="text-align:right" | 50 | style="text-align:right" | 81 | 130.917053(4) | 56.0(5)&nbsp;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)&nbsp;keV | rowspan=2|58.4(5)&nbsp;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)&nbsp;keV | 316(5)&nbsp;ns | IT | ¹³¹Sn | (23/2−) | | |-id=Tin-132 | ¹³²Sn | style="text-align:right" | 50 | style="text-align:right" | 82 | 131.9178239(21) | 39.7(8)&nbsp;s | β^− | ¹³²Sb | 0+ | | |-id=Tin-132m | style="text-indent:1em" | ^132mSn | colspan="3" style="text-indent:2em" | 4848.52(20)&nbsp;keV | 2.080(16)&nbsp;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|1.37(7)&nbsp;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| 0.93(8)&nbsp;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)&nbsp;keV | 87(8)&nbsp;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|515(5)&nbsp;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|355(18)&nbsp;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|249(15)&nbsp;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|148(9)&nbsp;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)&nbsp;keV | 210(45)&nbsp;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|120(38)&nbsp;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| 50#&nbsp;ms<br>[>550&nbsp;ns] |β^−? |¹⁴⁰Sb |rowspan=3|0+ |rowspan=3| |rowspan=3| |- |β^−n? |¹³⁹Sb |- |β^−2n? |¹³⁸Sb

<span class="anchor" id="Tin117m1"></span> Tin-117m

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

<span class="anchor" id="Tin-121m1"></span> Tin-121m

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.

Tin-126

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.

• ANL factsheet

See also

Daughter products other than tin

• Isotopes of antimony
• Isotopes of indium
• Isotopes of cadmium

References