Beta Spectrum ofMn56

A detailed magnetic spectrometer study of the beta spectrum of ${\mathrm{Mn}}^{56}$ was made with particular emphasis on the shape of the highest energy group. In spite of the high comparative half-life for this 3+ to 2+ allowed transition, no evidence was found for any contribution to the shape factor from higher order terms. The beta spectrum consists of the following groups: 2.838 MeV, 47%, $logft=7.1\mathrm{}$; 1.028 MeV, 34%, $logft=5.3\mathrm{}$; 0.718 MeV, 18%, $logft=5.5\mathrm{}$; 0.30, ≈1.%, $logft=5.3\mathrm{}$.