Measurement of the branching ratio of the He6 β-decay channel into the α+d continuum

R. Raabe, J. Büscher, J. Ponsaers, F. Aksouh, M. Huyse, O. Ivanov, S.R. Lesher, I. Mukha, D. Pauwels, M. Sawicka, D. Smirnov, I. Stefanescu, J. Van De Walle, P. Van Duppen, C. Angulo, J. Cabrera, N. De Séréville, I. Martel, A.M. Sánchez-Benítez, Christian Aaen Diget

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Abstract

We measured the deuteron-emission branch of the β decay of the halo nucleus He6 using the technique of implantation into a highly segmented silicon detector. The method, used here for the first time with a beam of He6 ions, ensures precise normalization; the value obtained for the branching ratio is B̄=(1.65±0.10)×10-6 (6% error). The summed energy spectra of the emitted α and d particles has also been measured. The results allow us to compare calculations from various models, potentially setting strong constraints on the precision required for the description of the He6 ground-state wave function.
Original languageEnglish
JournalPhysical Review C
Volume80
Issue number5
DOIs
Publication statusPublished - 16 Nov 2009

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