Comparison of techniques for computing shell-model effective operators

Michael Thoresen, Petr Navrátil, Bruce R Barrett

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Different techniques for calculating effective operators within the framework of the shell model using the same effective interaction and the same excitation spaces are presented. Starting with the large-basis no-core approach, we compare the time-honored perturbation-expansion approach and a model-space truncation approach. Results for the electric quadrupole and magnetic dipole operators are presented for 6Li. The convergence trends and dependence of the effective operators on differing excitation spaces and Pauli Q-operators are studied. In addition, the dependence of the electric-quadrupole effective charge on the harmonic-oscillator frequency and the mass number, for A = 5,6, is investigated in the model-space truncation approach.

Original languageEnglish (US)
Pages (from-to)3108-3118
Number of pages11
JournalPhysical Review C - Nuclear Physics
Volume57
Issue number6
StatePublished - Jun 1998

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operators
quadrupoles
approximation
magnetic dipoles
harmonic oscillators
excitation
dipoles
trends
perturbation
expansion
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Comparison of techniques for computing shell-model effective operators. / Thoresen, Michael; Navrátil, Petr; Barrett, Bruce R.

In: Physical Review C - Nuclear Physics, Vol. 57, No. 6, 06.1998, p. 3108-3118.

Research output: Contribution to journalArticle

Thoresen, Michael ; Navrátil, Petr ; Barrett, Bruce R. / Comparison of techniques for computing shell-model effective operators. In: Physical Review C - Nuclear Physics. 1998 ; Vol. 57, No. 6. pp. 3108-3118.
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