Magnetic Analysis of the Deuteron-Beryllium Reactions

Abstract

The charged particle spectra from the deuteron bombardment of ${\mathrm{Be}}^9$ have been analyzed magnetically with a spectrograph employing a second-order focus. Previously established transitions to states in ${\mathrm{Be}}^{10}$ and ${\mathrm{Li}}^7$ were observed, and a careful search of the proton and alpha-spectra failed to disclose additional states in these nuclei, throughout the region explored. The excitation energy of the second excited state of ${\mathrm{Li}}^7$ was determined as 4.62±0.02 Mev. The transition to the broad first excited state of ${\mathrm{Be}}^8$, as well as to the ground state, was revealed in the triton spectrum. Alpha- and triton continue resulting from the three-particle disintegrations, ${\mathrm{Be}}^9(d, \alpha ){\mathrm{Li}}^{7**}\left(\alpha \right)t$ and ${\mathrm{Be}}^9(d, t){\mathrm{Be}}^{8*}\left(\alpha \right)\alpha$, were also observed and examined in some detail. Other three-particle disintegrations appear improbable but cannot be definitely excluded, at the bombarding energies employed from 0.5 to 1.0 Mev.