Decay Mode and Half-life of Uranium 238

Decay mode and Half-life of Uranium 238

  • Uranium 238 decays via alpha decay to 234Th.
  • Half-life of uranium 238 is ~4.5×109 years.
  • Uranium 238 occasionally decays by spontaneous fission with probability of 0.000055%.
  • Its specific activity is very low ~3.4×10-7 Ci/g.
Uranium 238 decay.
Uranium 238 decays via alpha decay (by way of thorium-234 and protactinium-234) into 234U.
Source: JANIS (Java-based nuclear information software)
http://www.oecd-nea.org/janis/
Isotope Specific Activity
Uranium 232 22 Ci/g
Uranium 233 0.0098 Ci/g
Uranium 234 0.0063 Ci/g
Uranium 236 0.000065 Ci/g
Uranium 235 0.0000022 Ci/g
Uranium 238 0.00000034 Ci/g

Table of specific activities of isotopes of uranium.

See above:

Uranium 238