Ab initio description of the exotic unbound 7He nucleus

Baroni, Simone; Navratil, Petr; Quaglioni, Sofia

doi:10.1103/PhysRevLett.110.022505

Title: Ab initio description of the exotic unbound ⁷He nucleus

Journal Article · Fri Jan 11 00:00:00 EST 2013 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.110.022505· OSTI ID:1248268

Baroni, Simone ^[1]; Navratil, Petr ^[2]; Quaglioni, Sofia ^[3]

Univ. Libre de Bruxelles, Bruxelles (Belgium); TRIUMF, Vancouver, BC (Canada)
TRIUMF, Vancouver, BC (Canada); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Livermore National Lab. (LLNL), Livermore, CA (United States)

In this study, the neutron-rich unbound ⁷He nucleus has been the subject of many experimental investigations. While the ground-state 3/2^– resonance is well established, there is a controversy concerning the excited 1/2^– resonance reported in some experiments as low lying and narrow (E_R~1 MeV, Γ≤1 MeV) while in others as very broad and located at a higher energy. This issue cannot be addressed by ab initio theoretical calculations based on traditional bound-state methods. We introduce a new unified approach to nuclear bound and continuum states based on the coupling of the no-core shell model, a bound-state technique, with the no-core shell model combined with the resonating-group method, a nuclear scattering technique. Our calculations describe the ground-state resonance in agreement with experiment and, at the same time, predict a broad 1/2^– resonance above 2 MeV.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1248268

Report Number(s):: LLNL-JRNL-588732; PRLTAO

Journal Information:: Physical Review Letters, Vol. 110, Issue 2; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 93 works

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