Effective operators from exact many-body renormalization

A. F. Lisetskiy, M. K.G. Kruse, B. R. Barrett, P. Navratil, I. Stetcu, J. P. Vary

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

We construct effective two-body Hamiltonians and E2 operators for the p shell by performing 16 Ω ab initio no-core shell model (NCSM) calculations for A=5 and A=6 nuclei and explicitly projecting the many-body Hamiltonians and E2 operator onto the 0 Ω space. We then separate the effective E2 operator into one-body and two-body contributions employing the two-body valence cluster approximation. We analyze the convergence of proton and neutron valence one-body contributions with increasing model space size and explore the role of valence two-body contributions. We show that the constructed effective E2 operator can be parametrized in terms of one-body effective charges giving a good estimate of the NCSM result for heavier p-shell nuclei.

Original languageEnglish (US)
Article number024315
JournalPhysical Review C - Nuclear Physics
Volume80
Issue number2
DOIs
StatePublished - Aug 28 2009

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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