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5Be (84AJ01)


(See the Isobar Diagram for 5Be)

The absence of any group structure in the neutron spectrum in the reaction 3He(3He, n)5Be at E(3He) = 18.0 to 26.0 MeV indicates that 5Be(0) is at least 4.2 MeV unstable with respect to 3He + 2p[(M - A) > 33.7 MeV]. With Coulomb corrections adjusted to match the 16.7 MeV states of 5He - 5Li, this observation places the first T = 3/2 level in these nuclei above Ex = 21.4 MeV (AD67E). See also (BE81D, NG82; theor.).