Fission Radioactivity

Fission Radioactivity
In this example, 238U decays via fission into 131Sn and 95Sr and 2 neutrons. The nuclei are in excited states and decay through the emission of many gamma-rays.

The "daughter" nuclei, are also radioactive and they beta decay:
131Sn (half-life is 56 seconds) and 95Sr (half-life is 23.9 seconds) beta decay to
131Sb (half-life is 23.0 minutes) and 95Y (half-life is 10.3 minutes) which also beta decay to
131Te (half-life is 25.0 minutes) and 95Zr (half-life is 64.0 days) which also beta decay to
131I (half-life is 8.0 day) and 95Nb (half-life is 35 days) which also beta decay to
131Xe and 95Mo which are stable.

Ground-state fission occurs in heavy nuclei (mass larger than 230). Fission also can occur in nuclear reactions

For more reading see Wikipedia's nuclear fission

For questions about this page please contact the HRIBF User Liaison.

This file last modified Friday March 16, 2007