Abstract
A shell model calculation for the states of91Tc has been carried out using the (1g9/2, 2p1/2) model space with residual interactions determined from previous studies and assuming thatZ=38N=50 is a closed shell. The results, both for the spectrum and the gamma decay modes, support the experimental angular momentum assignments made for the high spin states. The predicted binding energy of the 9/2+ ground state relative to88Sr is within 75 keV of the experimental value and the calculated excitation energy of the 1/2− state is 183 keV. There is only one instance where theory and experiment disagree: the highest energy excited state, the 41/2− at 7.715 MeV, is predicted to undergo quadrupole decay to the 37/2− and this decay mode is not seen.
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