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Updated three-body model of 6He β decay into the α+d continuum

par Tursunov, Ergash ;Baye, Daniel Jean ;Descouvemont, Pierre
Référence Physical Review C, 97, 1, 014302
Publication Publié, 2018-01-01

Article révisé par les pairs

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Résumé :

The β-decay process of the He6 halo nucleus into the α+d continuum is studied in an updated three-body model. The He6 nucleus is described as an α+n+n system in hyperspherical coordinates on a Lagrange mesh. The shape and absolute values of the transition probability per time and energy units of new experiments are reproduced with a modified α+d potential. The obtained total transition probabilities are (2.48±0.16)×10-6s-1 for the full energy region and (2.40±0.16)×10-6s-1 for the cut-off E>150 keV. The strong cancellation between the internal and halo parts of the β decay matrix element is a challenge for future ab initio calculations.