Microscopic origins of effective charges in the shell model
- Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States)
We use a large-scale 6{h_bar}{Omega} calculation for {sup 6}Li with microscopically derived two-body interaction to construct the 0{h_bar}{Omega} 0p shell effective Hamiltonian, electric quadrupole, and magnetic dipole operators. While the {ital E2} and {ital M1} 6{h_bar}{Omega} operators are one-body operators with free nucleon charges, the effective operators are two-body operators with substantially different renormalization for the isoscalar and isovector matrix elements, especially for the {ital E2} operator. We show that these operators can be very well approximated by one-body operators provided that effective proton {ital and} neutron charges are used. The obtained effective charges are compatible with those used in phenomenological shell-model studies. The two-body part of the effective operators is estimated. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 450525
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 55; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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