Measurement of the branching ratio of the $^{6}\mathrm{He}$ $\ensuremath{\beta}$-decay channel into the $\ensuremath{\alpha}+d$ continuum

Measurement of the branching ratio of the ${}^{6}{He}$ $β$ -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, and C. Aa. Diget

Phys. Rev. C 80, 054307 – Published 16 November 2009

Abstract

We measured the deuteron-emission branch of the $β$ decay of the halo nucleus ${}^{6}{He}$ using the technique of implantation into a highly segmented silicon detector. The method, used here for the first time with a beam of ${}^{6}{He}$ ions, ensures precise normalization; the value obtained for the branching ratio is $\bar{B} = (1.65 \pm 0.10) \times 10^{- 6}$ ( $6 %$ 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 ${}^{6}{He}$ ground-state wave function.

Received 29 June 2007

DOI:https://doi.org/10.1103/PhysRevC.80.054307

Authors & Affiliations

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^‡, and P. Van Duppen

Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium

C. Angulo, J. Cabrera^§, and N. de Séréville^∥

Centre de Recherches du Cyclotron, Université Catholique de Louvain, Chemin du Cyclotron 2, B-1348 Louvain-la Neuve, Belgium

I. Martel and A. M. Sánchez-Benítez

Departamento de Física Aplicada, Facultad de Ciencias Experimentales, Campus de El Carmen, Avenida de las Fuerzas Armadas, Universidad de Huelva, E-21071 Huelva, Spain

C. Aa. Diget^¶

Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, Building 1520, DK-8000 Aarhus C, Denmark

^*Present address: Department of Physics, University of Richmond, Richmond, Virginia 23173, USA.
^†Present address: University of Seville, E-41012 Sevilla, Spain.
^‡Present address: ISOLDE, CERN, Geneva, Switzerland.
^§Present address: Centre for Space Radiations (CSR), UCL, Louvain-la-Neuve, Belgium.
^∥Present address: IPN, IN2P3/CNRS and Université Paris Sud, F-91406 Orsay Campus, France.
^¶Present address: Department of Physics, University of York, York YO10 5DD, UK.

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Vol. 80, Iss. 5 — November 2009

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Physical Review C

covering nuclear physics

Measurement of the branching ratio of the ${}^{6}{He}$ $β$ -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, and C. Aa. Diget

Phys. Rev. C 80, 054307 – Published 16 November 2009

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Physical Review C

covering nuclear physics

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, and C. Aa. Diget

Phys. Rev. C 80, 054307 – Published 16 November 2009

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Measurement of the branching ratio of the ${}^{6}{He}$ $β$ -decay channel into the $α + d$ continuum