Particle decay ofBe6

Abstract

The particle decay of the ground state of $^{6}\mathrm{Be}$ was observed following population in the $^{6}\mathrm{Li}(^{3}\mathrm{He}, t)^{6}\mathrm{Be}$ reaction. The $\ensuremath{\alpha}$ particle decay spectrum corresponds to the ordinary three body phase space shape for energies above about 100 keV in the $^{6}\mathrm{Be}$ center-of-mass system. At lower energies the relative yield exceeds the available phase space. It is shown that neither the phase space spectrum modified by the proton-proton final state interaction nor the spectrum corresponding to sequential decay through the $^{5}\mathrm{Li}$ ground state have shapes consistent with the data. The enhanced yield of low energy $\ensuremath{\alpha}$ particles is not accounted for by either process.RADIOACTIVITY $^{6}\mathrm{Be}$; measured $\ensuremath{\sigma}({E}_{\ensuremath{\alpha}})$. NUCLEAR REACTIONS $^{6}\mathrm{Be}$; $^{6}\mathrm{Li}(^{3}\mathrm{He}, t)^{6}\mathrm{Be}\ensuremath{\rightarrow}\ensuremath{\alpha}+2p$, $E=24$ MeV measured ${E}_{t}$, ${E}_{\ensuremath{\alpha}}$ coin.