Breit-Wigner to Gaussian transition in strength functions

Details Breit-Wigner to Gaussian transition in strength functions Breit-Wigner to Gaussian transition in strength functions

2000-06-30

arxiv.org/abs/nucl-th/0006079v1

Physics

Nuclear Physics

Nuclear Theory

7 pages, 2 figures, submitted to Phys. Rev. C

Scientific paper

Employing hamiltonians defined by two-body embedded Gaussian orthogonal ensemble of random matrices(EGOE(2)) plus a mean-field producing one-body part, strength functions (for states defined by the one-body part) are constructed for various values of the strength of the chaos generating two-body part. Numerical calculations for six and seven fermion systems clearly demonstrate Breit-Wigner to Gaussian transition, in the chaotic domain, in strength functions as found earlier in nuclear shell model and Lipkin-Meshkov-Glick model calculations.

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