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Title: Continuum and three-nucleon force effects on Be 9 energy levels

Abstract

In this paper, we extend the recently proposed ab initio no-core shell model with continuum to include three-nucleon (3N) interactions beyond the few-body domain. The extended approach allows for the assessment of effects of continuum degrees of freedom as well as of the 3N force in ab initio calculations of structure and reaction observables of p- and lower-sd-shell nuclei. As a first application we concentrate on energy levels of the 9Be system for which all excited states lie above the n- 8Be threshold. For all energy levels, the inclusion of the continuum significantly improves the agreement with experiment, which was an issue in standard no-core shell model calculations. Furthermore, we find the proper treatment of the continuum indispensable for reliable statements about the quality of the adopted 3N interaction from chiral effective field theory. Finally, in particular, we find the 1/2 + resonance energy, which is of astrophysical interest, in good agreement with experiment.

Authors:
 [1];  [2];  [3];  [3];  [4];  [1]
  1. Technical Univ. of Darmstadt (Germany). Inst. of Nuclear Physics
  2. TRIUMF, Vancouver, BC (Canada)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Technical Univ. of Darmstadt (Germany). Inst. of Nuclear Physics; TRIUMF, Vancouver, BC (Canada)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Technical Univ. of Darmstadt (Germany); TRIUMF, Vancouver, BC (Canada)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); German Research Foundation (DFG); German Federal Ministry of Education and Research (BMBF); Natural Sciences and Engineering Research Council of Canada (NSERC)
OSTI Identifier:
1255175
Alternate Identifier(s):
OSTI ID: 1180145
Report Number(s):
LLNL-JRNL-663595
Journal ID: ISSN 0556-2813
Grant/Contract Number:  
AC52-07NA27344; AC02-05CH11231; SFB 634; 06DA7047I; 401945-2011
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Langhammer, Joachim, Navrátil, Petr, Quaglioni, Sofia, Hupin, Guillaume, Calci, Angelo, and Roth, Robert. Continuum and three-nucleon force effects on Be9 energy levels. United States: N. p., 2015. Web. doi:10.1103/PhysRevC.91.021301.
Langhammer, Joachim, Navrátil, Petr, Quaglioni, Sofia, Hupin, Guillaume, Calci, Angelo, & Roth, Robert. Continuum and three-nucleon force effects on Be9 energy levels. United States. doi:10.1103/PhysRevC.91.021301.
Langhammer, Joachim, Navrátil, Petr, Quaglioni, Sofia, Hupin, Guillaume, Calci, Angelo, and Roth, Robert. Thu . "Continuum and three-nucleon force effects on Be9 energy levels". United States. doi:10.1103/PhysRevC.91.021301. https://www.osti.gov/servlets/purl/1255175.
@article{osti_1255175,
title = {Continuum and three-nucleon force effects on Be9 energy levels},
author = {Langhammer, Joachim and Navrátil, Petr and Quaglioni, Sofia and Hupin, Guillaume and Calci, Angelo and Roth, Robert},
abstractNote = {In this paper, we extend the recently proposed ab initio no-core shell model with continuum to include three-nucleon (3N) interactions beyond the few-body domain. The extended approach allows for the assessment of effects of continuum degrees of freedom as well as of the 3N force in ab initio calculations of structure and reaction observables of p- and lower-sd-shell nuclei. As a first application we concentrate on energy levels of the 9Be system for which all excited states lie above the n-8Be threshold. For all energy levels, the inclusion of the continuum significantly improves the agreement with experiment, which was an issue in standard no-core shell model calculations. Furthermore, we find the proper treatment of the continuum indispensable for reliable statements about the quality of the adopted 3N interaction from chiral effective field theory. Finally, in particular, we find the 1/2+ resonance energy, which is of astrophysical interest, in good agreement with experiment.},
doi = {10.1103/PhysRevC.91.021301},
journal = {Physical Review. C, Nuclear Physics},
number = 2,
volume = 91,
place = {United States},
year = {Thu Feb 05 00:00:00 EST 2015},
month = {Thu Feb 05 00:00:00 EST 2015}
}

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Cited by: 13 works
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