Elsevier

Nuclear Physics A

Volume 560, Issue 2, 19 July 1993, Pages 664-676
Nuclear Physics A

Study of charged particles emitted in the β-decay of 6,8He

https://doi.org/10.1016/0375-9474(93)90039-ZGet rights and content

Abstract

The beta-delayed charged particle spectra from 6He and 8He were measured with a telescope consisting of a gas counter and a Si surface barrier detector. Beta-delayed deuterons and tritons are emitted in the two cases with branching ratios of (7.6±0.6) × 10−6, Ed > 350 keV and (8.0±0.5) × 10−3, respectively. Both spectra present anomalies that must be due to the special structure of these nuclei (an alpha core surrounded by several neutrons).

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    Citation Excerpt :

    Indeed, when a sufficiently weakly bound halo neutron β decays, the produced proton can be emitted, possibly together with neutrons. Processes where this proton is bound with one or two neutrons have been observed in the β delayed deuteron and triton decays of 6He and 11Li [1–8]. Recently we have calculated the branching ratio of an even rarer process where the proton remains unbound but is accompanied by a free neutron [9].

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