Decay Mode and Half-life of Uranium 235

Decay mode and Half-life of Uranium 235

  • Uranium 235 decays via alpha decay (by way of thorium-231) into 231Pa.
  • Half-life of uranium 235 is ~7 x 108 years.
  • Uranium 235 occasionally decays by spontaneous fission with very low probability of 0.0000000072%.
  • Its specific activity is very low ~2.2×10-6 Ci/g.
Uranium 235 decay.
Uranium 235 decays via alpha decay Source: JANIS (Java-based Nuclear Data Information Software) http://www.oecd-nea.org/janis/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 235