HALF-LIVES OF Rb94, Sr94, Y94, Rb93, Sr95, Y95

Abstract

The existence of a new rubidium isotope, Rb94, has been established and its half-life measured. The half-life of this fission product was determined using the technique of timed precipitations. The value obtained for Rb94 was 2.9 ± 0.3 seconds. With this same technique only an upper limit of 2.5 seconds could be assigned to Rb95. The half-lives of the strontium and yttrium daughters were also determined. The strontium isotopes were studied both by timed precipitations and direct measurements. The half-lives of Sr94 and Sr95 were found to be 1.36 ± 0.06 minutes and 0.8 ± 0.15 minute, respectively. Direct measurements lead to half-lives of 20.35 ± 0.20 minutes for Y94 and 10.9 ± 0.2 minutes for Y95.