Elsevier

Nuclear Physics

Volume 21, November–December 1960, Pages 133-136
Nuclear Physics

New nucleide actinium-231

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Abstract

A new nucleide actinium-231 was identified from the reaction of Th232(γ, p)Ac231 induced by the 25-MeV bremsstrahlung. The activity was chemically separated from fission products with the aid of a recoil method. The half-life of this new isotope was found to be T12 = 15±1 min and the end-point energy of the beta ray was Eβ = 2.1±0.1 MeV. Several weak gamma rays were also observed.

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Cited by (9)

  • Nuclear Data Sheets for A = 231

    2013, Nuclear Data Sheets
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Work performed at Department of Physics, Tohoku University, Sendai, Japan.

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