Elucidating halo structure by <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>β</mi></math> decay: <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>β</mi><mi>γ</mi></math> from the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>11</mn></mrow></msup></mrow></math>Li decay

the ISOLDE Collaboration; M. J. G. Borge; H. Fynbo; D. Guillemaud-Mueller; P. Hornshøj; F. Humbert; B. Jonson; T. E. Leth; G. Martínez-Pinedo; T. Nilsson; G. Nyman; A. Poves; I. Ramos-Lerate; K. Riisager; G. Schrieder; M. Smedberg; O. Tengblad

doi:10.1103/PhysRevC.55.R8

Rapid Communication

Elucidating halo structure by $β$ decay: $β γ$ from the $^{11}$ Li decay

M. J. G. Borge, H. Fynbo, D. Guillemaud-Mueller, P. Hornshøj, F. Humbert, B. Jonson, T. E. Leth, G. Martínez-Pinedo, T. Nilsson, G. Nyman, A. Poves, I. Ramos-Lerate, K. Riisager, G. Schrieder, M. Smedberg, and O. Tengblad (the ISOLDE Collaboration)

Phys. Rev. C 55, R8(R) – Published 1 January 1997

Abstract

New values for the $γ$ ray intensities following the $β$ decay of $^{11}$ Li are presented. Special emphasis is put on the determination of the Gamow-Teller transition $^{11}$ Li $\to$ $^{11}$ Be (1/2 $^{-}$ , 320 keV) to the only bound excited state in $^{11}$ Be. We show that a shell-model calculation can simultaneously reproduce the half-life of $^{11}$ Li and the newly measured branching ratio to the ${1 / 2}^{-}$ state provided the $^{11}$ Li ground state wave function contains about 50% of $s$ -wave neutron components.

Received 15 July 1996

DOI:https://doi.org/10.1103/PhysRevC.55.R8

Authors & Affiliations

M. J. G. Borge¹, H. Fynbo², D. Guillemaud-Mueller³, P. Hornshøj², F. Humbert⁴, B. Jonson⁵, T. E. Leth², G. Martínez-Pinedo⁶, T. Nilsson⁵, G. Nyman⁵, A. Poves⁶, I. Ramos-Lerate¹, K. Riisager², G. Schrieder⁴, M. Smedberg⁵, and O. Tengblad⁷ (the ISOLDE Collaboration)

¹Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain
²Institut for Fysik og Astronomi, Aarhus Universitet, DK-8000 Aarhus C, Denmark
³Institut de Physique Nucléaire, IN2P3-CNRS, F-91406 Orsay Cedex, France
⁴Institut für Kernphysik, Technische Hochschule, D-64289 Darmstadt, Germany
⁵Fysiska Institutionen, Chalmers Tekniska Högskola, S-41296 Göteborg, Sweden
⁶Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
⁷PPE Division, CERN, CH-1211 Genève 23, Switzerland

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Vol. 55, Iss. 1 — January 1997

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