View More View Less
  • 1 A.E.R.E. Chemistry Division Harwell Oxon England
Restricted access


The half-life of239Pu has been determined by specific activity measurements on solutions prepared from the stoichiometric compounds Cs2 PuCl6, using plutonium 99.03% enriched in239Pu. The value obtained is 24,088 years, to which a realistic uncertainty of ±51 years is ascribed. This result is discussed in relationship to all previously reported values.