Pairing effects in N =82 isotones

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.250· OSTI ID:6848267

Andreozzi, F; Covello, A; Gargano, A; Porrino, A ^[1]

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1. Dipartimento di Scienze Fisiche, Universita di Napoli, Napoli (Italy) Istituto Nazionale di Fisica Nucleare, 80125 Napoli (Italy)

The importance of pairing effects in the {ital N}=82 isotones is extensively investigated by studying the string of nuclei with {ital A} ranging from 135 to 151. The pairing Hamiltonian is treated by an equations-of-motion method which is strictly number conserving. The coupling strength is determined by an analysis of the properties of the even-mass isotones. The single-particle energies are extracted from the experimental spectra of {sup 137}Cs and {sup 145}Eu through use of the equations which give the energies of the seniority-one states in a way which is analogous to the inverse gap equation method. A detailed comparison of the calculated results with experimental data in even and odd nuclei provides firm evidence of the prominent role of proton pairing correlations in the 50--82 shell. It is found that non-negligible correlations are present in {sup 146}Gd.

• OSTI ID: 6848267
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:1; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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