Anomalous populations of particle-unbound states in 10B.
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Relative populations of particle unstable states in B10 were measured for the normal kinematics reactions N14+27Al and N14+197Au at E/A=75 MeV, the nearly symmetric reaction Xe129+122Sn at E/A=31 MeV, and the inverse kinematics reaction Xe129+27Al at E/A=31 MeV. In all cases, populations of excited states are incompatible with statistical populations of the known excited states of this nucleus. For the induced129 reactions, discrepancies are smaller than for the induced14 reactions. The overall agreement with statistical calculations is improved by assuming a proposed but not confirmed 3+ excited state contributing to the group of levels at E*=6 MeV. 1994 The American Physical Society.