Long- and short-range correlations in the ab-initio no-core shell model

Journal Article · Wed Mar 15 04:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.037307· OSTI ID:20771406

Stetcu, Ionel; Barrett, Bruce R; Navratil, Petr; Vary, James P ^[1]

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1. Department of Physics, University of Arizona, P.O. Box 210081, Tucson, Arizona 85721 (United States)

In the framework of the ab-initio no-core shell model (NCSM), we describe the longitudinal-longitudinal distribution function, part of the inclusive (e,e{sup '}) longitudinal response. In the two-body cluster approximation, we compute the effective operators consistent with the unitary transformation used to obtain the effective Hamiltonian. When short-range correlations are probed, the results display independence from the model space size and length scale. Long-range correlations are more difficult to model in the NCSM and they can be des-cribed only by increasing the model space or increasing the cluster size. In order to illustrate the model space independence for short-range observables, we present results for a large set of model spaces for {sup 4}He, and in 0-4({Dirac_h}/2{pi}){omega} model spaces for {sup 12}C.

• OSTI ID: 20771406
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 73; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
CARBON 12
CORRELATIONS
DISTRIBUTION FUNCTIONS
ELECTRON REACTIONS
ELECTRONS
HAMILTONIANS
HELIUM 4
SHELL MODELS
TRANSFORMATIONS
TWO-BODY PROBLEM