Abstract
We propose a Quantum Monte Carlo diagonalization method for solving the quantum many-body interacting systems. Not only the ground state but also low-lying excited states are obtained with their wave functions. Consequently the level structure of low-lying states can be studied with realistic interactions. After testing this method with48Cr, we report that the doubly closed shell probability of56Ni is shown to be only 53% in a full pf shell calculation, in contrast to the corresponding probability of48Ca which reaches 86%. The most recent results on32Mg are presented.
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