Tin-121m
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| Medium-lived fission products |
||||
|---|---|---|---|---|
| Property: t½ Unit: (a) |
Yield (%) |
Q * (KeV) |
βγ * |
|
| 155Eu | 4.76 | .0803 | 252 | βγ |
| 85Kr | 10.76 | .2180 | 687 | βγ |
| 113mCd | 14.1 | .0008 | 316 | β |
| 90Sr | 28.9 | 4.505 | 2826 | β |
| 137Cs | 30.23 | 6.337 | 1176 | βγ |
| 121mSn | 43.9 | .00005 | 390 | βγ |
| 151Sm | 90 | .5314 | 77 | β |
Tin-121m is a radioisotope and nuclear isomer of tin with a halflife of 43.9 years. 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 121mSn at higher yields.
