Nucleon and nucleon-pair momentum distributions in A≤12 nuclei

Wiringa, R. B.; Schiavilla, R.; Pieper, Steven C.; Carlson, J.

doi:10.1103/PhysRevC.89.024305

Title: Nucleon and nucleon-pair momentum distributions in $A \leq 12$ nuclei

Journal Article · Sat Feb 01 00:00:00 EST 2014 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.89.024305· OSTI ID:1395166

Wiringa, R. B.; Schiavilla, R.; Pieper, Steven C.; Carlson, J.

Background: Momentum distributions of individual nucleons and nucleon pairs reflect features of the short-range structure of nuclei and provide useful insights into various reactions on nuclei, such as ( e , e ' p ) and ( e , e ' p p / p n ) electrodisintegration processes or neutrino-nucleus interaction experiments. Purpose: To provide the nuclear physics community with the results (available online) of a systematic study of single-nucleon momentum distributions and nucleon-pair and nucleon-cluster momentum distributions for A ≤ 12 nuclei. Method: The realistic Argonne v 18 two-nucleon and Urbana X three-nucleon potentials are used to generate accurate variational Monte Carlo wave functions for the A ≤ 12 nuclei; quantum Monte Carlo methods are used to calculate the momentum distributions. Results: Single-nucleon distributions are given, broken down into proton and neutron components and spin-up and spin-down components where appropriate. Nucleon-pair momentum distributions are given either in pair spin and isospin ST projection or for p p , p n , and n n pairs. Nucleon-cluster momentum distributions include d p in 3 He, t p and d d in 4 He, α d in 6 Li, α t in 7 Li, and α α in 8 Be. Conclusions: The momentum distributions exhibit common characteristic shapes, with tensor correlations (or lack thereof) playing a dominant role in the 1.5–3 fm - 1 range, while spin-isospin correlations dominate at higher momenta.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1395166

Journal Information:: Physical Review C, Nuclear Physics, Vol. 89, Issue 2; ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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