Abstract
An experimental search for the low-lying {sup 7}H resonance was performed with the {sup 2}H({sup 8}He{sup 3}He){sup 7}H reaction studied at forward center-of-mass angles (6 deg. - 14 deg.) with a 42 A MeV {sup 8}He beam. No well-pronounced peak of {sup 7}H was observed; however, the obtained spectrum was found to have a peculiarity at approx2 MeV above the t+4n threshold. The data allow us to set a c.m.s. cross section level of approx30 mub/sr for the low-energy part of the {sup 7}H spectrum. The test reaction {sup 2}H({sup 12}Be{sup 3}He){sup 11}Li, involving the same one-proton (d,{sup 3}He) transfer, was studied simultaneously on a 71 A MeV satellite beam where a cross section of approx =1 mb/sr was measured for the population of the {sup 11}Li ground state.
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