Back Isotope van hassium Afrikaans Isòtops del hassi Catalan Izotopy hassia Czech Хасси изотопĕсем CV Anexo:Isótopos de hasio Spanish ایزوتوپهای هاسیم Persian Isotopes du hassium French A hasszium izotópjai Hungarian Isotop hasium ID ハッシウムの同位体 Japanese
| |||||||||||||||||||||||||||||||
Hassium (108Hs) is a synthetic element, and thus a standard atomic weight cannot be given. Like all synthetic elements, it has no stable isotopes. The first isotope to be synthesized was 265Hs in 1984. There are 13 known isotopes from 263Hs to 277Hs and up to six isomers. The most stable known isotope is 271Hs, with a half-life of about 46 seconds, though this assignment is not definite due to uncertainty arising from a low number of measurements. The isotopes 269Hs and 270Hs respectively have half-lives of about 12 seconds and 7.6 seconds. It is also possible that the isomer 277mHs is more stable than these, with a reported half-life 130±100 seconds, but only one event of decay of this isotope has been registered as of 2016.[2][3]
- ^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
- ^ "Radioactive Elements". Commission on Isotopic Abundances and Atomic Weights. 2018. Retrieved 2020-09-20.
- ^ Audi et al. 2017, p. 030001-136.