Unified Description of Li6 Structure and Deuterium-He4 Dynamics with Chiral Two- and Three-Nucleon Forces

Abstract : We provide a unified ab initio description of the Li6 ground state and elastic scattering of deuterium (d) on He4 (α) using two- and three-nucleon forces from chiral effective field theory. We analyze the influence of the three-nucleon force and reveal the role of continuum degrees of freedom in shaping the low-lying spectrum of Li6. The calculation reproduces the empirical binding energy of Li6, yielding an asymptotic D- to S-state ratio of the Li6 wave function in the d+α configuration of −0.027, in agreement with a determination from Li6−He4 elastic scattering, but overestimates the excitation energy of the 3+ state by 350 keV. The bulk of the computed differential cross section is in good agreement with data. These results endorse the application of the present approach to the evaluation of the H2(α,γ)Li6 radiative capture, responsible for the big-bang nucleosynthesis of Li6.
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Physical Review Letters, American Physical Society, 2015, 114 (21), pp.212502. 〈10.1103/PhysRevLett.114.212502〉
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http://hal.in2p3.fr/in2p3-01188887
Contributeur : Sophie Heurteau <>
Soumis le : lundi 31 août 2015 - 16:56:12
Dernière modification le : jeudi 11 janvier 2018 - 06:12:40

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G. Hupin, S. Quaglioni, P. Navrátil. Unified Description of Li6 Structure and Deuterium-He4 Dynamics with Chiral Two- and Three-Nucleon Forces. Physical Review Letters, American Physical Society, 2015, 114 (21), pp.212502. 〈10.1103/PhysRevLett.114.212502〉. 〈in2p3-01188887〉

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