Decay of ⁵³V and ⁵⁷Mn

Abstract

The 1.287 MeV level $\text{(J}{}^{\mathrm{\pi }}\text{=}\text{7}\text{2}{}^{\mathrm{-}}\text{)}$ in ⁵³Cr was found to be populated in the β-decay of 1.60 min ⁵³V. Beta-gamma coincidences revealed β-rays of 2.50 and 2.20 MeV in coincidence with the 1.003 and 1.287 MeV levels in ⁵³Cr.

Four new γ-rays were found in the decay of 1.54 min ⁵⁷Mn. The energy level of 1.625 MeV in ⁵⁷Fe was found to be populated. Beta decay of ⁵⁷Mn $\text{(J}{}^{\mathrm{\pi }}\text{=}\text{5}\text{2}{}^{\mathrm{-}}\text{)}$ to the 0.014 MeV level $\text{(J}{}^{\mathrm{\pi }}\text{=}\text{3}\text{2}{}^{\mathrm{-}}\text{)}$ in ⁵⁷Fe was measured to be 83.5%. The beta decay Q-value of ⁵⁷Mn was determined to be 2.56±0.10 MeV.