Abstract
The reaction 6Li(p,n) 6Be has been studied by slow-neutron detection, with particular attention to the 6Be ground state threshold. The detector response was calculated by a Monte Carlo technique and verified with a measurement of the 7Li(α,n) 10B threshold. An analysis of the shape of the 6Be threshold indicated that both s- and p-wave neutrons contribute significantly to the reaction. The results depend on what mode of decay is assumed for the ground state of 6Be. If a two-stage process is assumed, with either an alpha particle and an unbound diproton or 5Li and a proton as intermediate state, the width is found to be 95±28 keV and the Q-value obtained for the 6Li(p,n) 6Be reaction is −5074±13 keV. It was not possible to detertmine which process is predominant. No higher thresholds in the slow neutron yield up to 4 MeV of excitation in 6Be were observed. The data above the ground state threshold are consistent with a broad excited state of 6Be or with the occurrence of other neutron-producing reactions.
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