4He+n+n continuum within an ab initio framework

Romero-Redondo, Carolina; Quaglioni, Sofia; Navratil, Petr; Hupin, Guillaume

doi:10.1103/PhysRevLett.113.032503

Title: ⁴He+n+n continuum within an ab initio framework

Journal Article · Wed Jul 16 00:00:00 EDT 2014 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.113.032503· OSTI ID:1249124

Romero-Redondo, Carolina ^[1]; Quaglioni, Sofia ^[2]; Navratil, Petr ^[1]; Hupin, Guillaume ^[2]

TRIUMF, Vancouver, BC (Canada)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

In this study, the low-lying continuum spectrum of the ⁶He nucleus is investigated for the first time within an ab initio framework that encompasses the ⁴He+n+n three-cluster dynamics characterizing its lowest decay channel. This is achieved through an extension of the no-core shell model combined with the resonating-group method, in which energy-independent nonlocal interactions among three nuclear fragments can be calculated microscopically, starting from realistic nucleon-nucleon interactions and consistent ab initio many-body wave functions of the clusters. The three-cluster Schrödinger equation is solved with three-body scattering boundary conditions by means of the hyperspherical-harmonics method on a Lagrange mesh. Using a soft similarity-renormalization-group evolved chiral nucleon-nucleon potential, we find the known J^π = 2⁺ resonance as well as a result consistent with a new low-lying second 2⁺ resonance recently observed at GANIL at ~2.6 MeV above the He6 ground state. We also find resonances in the 2^–, 1⁺, and 0^– channels, while no low-lying resonances are present in the 0⁺ and 1^– channels.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1249124

Report Number(s):: LLNL-JRNL-652701; PRLTAO

Journal Information:: Physical Review Letters, Vol. 113, Issue 3; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 32 works

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References (32)

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Effective field theory description of halo nuclei Hammer, H-W; Ji, C.; Phillips, D. R. Journal of Physics G: Nuclear and Particle Physics, Vol. 44, Issue 10 https://doi.org/10.1088/1361-6471/aa83db	journal	September 2017
Identifying structures in the continuum: Application to ${}^{16}{Be}$ Casal, J.; Gómez-Camacho, J. Physical Review C, Vol. 99, Issue 1 https://doi.org/10.1103/physrevc.99.014604	journal	January 2019
Experimental Evidence of a Variant Neutron Spectrum from the $T (t, 2 n) α$ Reaction at Center-of-Mass Energies in the Range of 16–50 keV Gatu Johnson, M.; Forrest, C. J.; Sayre, D. B. Physical Review Letters, Vol. 121, Issue 4 https://doi.org/10.1103/physrevlett.121.042501	journal	July 2018
Electric multipole response of the halo nucleus 6He Singh, Jagjit; Fortunato, L.; Vitturi, A. The European Physical Journal A, Vol. 52, Issue 7 https://doi.org/10.1140/epja/i2016-16209-8	journal	July 2016
Scattering cluster wave functions on the lattice using the adiabatic projection method Rokash, Alexander; Pine, M.; Elhatisari, S. Proceedings of The 8th International Workshop on Chiral Dynamics — PoS(CD15) https://doi.org/10.22323/1.253.0117	conference	June 2016
Effective field theory description of halo nuclei Hammer, H. -W.; Ji, C.; Phillips, D. R. arXiv https://doi.org/10.48550/arxiv.1702.08605	text	January 2017
Microscopic Clustering in Light Nuclei Freer, Martin; Horiuchi, Hisashi; Kanada-En'yo, Yoshiko arXiv https://doi.org/10.48550/arxiv.1705.06192	text	January 2017

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