??????-137
A sealed caesium-137 radioactive source Full table
General
???? , ??????	??????-137, 137 Cs
????????? (??)	82
????????? (??)	55
Nuclide data
????????? ???? ?????	0 (trace)
????????????	30.17 y ± 0.03 y
???? ??????????? (??)	137 Xe  ( β ? )
?????? ??????? ???? ????????????????(?)	137m Ba
??????????? ???????	136.907 u
Spin	7 ⁄ 2 +
?????? ??????? ??? ????	?????? ??????? ??? ??????
β- ( beta decay )	0.5120 MeV
γ ( gamma-rays )	0.6617 MeV

??????-137 (137 55C ) ?????????? ?????????????, ????????????? ????????????? ??????????? ???. ????????????????? ????????????????????? ?????? 137 ????????????. ?????? 137 ???? ?????????? 30.17 ??????? ^[1] .

??????????? ???????? ????? ????????????????? ????? ???????????????????????? ??????? ????????????? ?????? 137 ??????????????. ????????????? ????? ??????????????? ???? ??????? ?????????? ??????? ?????? 137. ???????? ????????????? ????????????????? ??????????? ??????????????? ?????? 137 ?????????????????? ^[2] . 1987 ??????? 13 ?? ????????? ?????????? ???????, ???????????? ??????? 137 ???? ????? ????????????.

?????? [ ????????? ]

1. ↑ National Institute of Standards and Technology (2009-09-06). "Radionuclide Half-Life Measurements" . Archived from the original on 2016-08-12 . Retrieved 7 November 2011 .
2. ↑ "CDC Radiation Emergencies | Radioisotope Brief: Cesium-137 (Cs-137)" . CDC . Retrieved 5 November 2013 .