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29 March 2024
 
  » arxiv » nucl-th/9805041

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Self-consistency in the Projected Shell Model
V. Velazquez ; J. G. Hirsch ; Y. Sun ;
Date 21 May 1998
Journal Nucl.Phys. A643 (1998) 39-51
Subject nucl-th
AbstractThe Projected Shell Model is a shell model theory built up over a deformed BCS mean field. Ground state and excited bands in even-even nuclei are obtained through diagonalization of a pairing plus quadrupole Hamiltonian in an angular momentum projected 0-, 2-, and 4-quasiparticle basis. The residual quadrupole-quadrupole interaction strength is fixed self-consistently with the deformed mean field and the pairing constants are the same used in constructing the quasiparticle basis. Taking $^{160}Dy$ as an example, we calculate low-lying states and compare them with experimental data. We exhibit the effect of changing the residual interaction strengths on the spectra. It is clearly seen that there are many $J^pi = 0^+, 1^+, 4^+$ bandheads whose energies can only be reproduced using the self-consistent strengths. It is thus concluded that the Projected Shell Model is a model essentially with no free parameters.
Source arXiv, nucl-th/9805041
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