Study of the Giant Gamow-Teller Resonance in nuclear beta decay: the case of 33Ar

M J G Borge; P Dessagne; G T Ewan; P G Hansen; A Huck; B Jonson; G Klotz; A Knipper; S Mattsson; G Nyman; C Richard-Serre; K Riisager; G Walter; ISOLDE Collaboration

doi:10.1088/0031-8949/36/2/005

Physica Scripta

Study of the Giant Gamow-Teller Resonance in nuclear beta decay: the case of ³³Ar

M J G Borge^1,2, P Dessagne³, G T Ewan⁴, P G Hansen^1,7, A Huck³, B Jonson⁵, G Klotz³, A Knipper³, S Mattsson⁵, G Nyman⁵, C Richard-Serre^1,8, K Riisager^1,6, G Walter³ and ISOLDE Collaboration¹

Published under licence by IOP Publishing Ltd
Physica Scripta, Volume 36, Number 2 Citation M J G Borge et al 1987 Phys. Scr. 36 218 DOI 10.1088/0031-8949/36/2/005

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Author affiliations

¹ EP-Division, CERN, Geneva, Switzerland;

² Insto. de Química-Física "Rocasolano", CSIC, Madrid, Spain;

³ Centre de Recherches Nucléaires, Strasbourg, France;

⁴ Department of Physics, Queen's University, Kingston, Ontario, Canada;

⁵ Department of Physics, Chalmers University of Technology, Göteborg, Sweden;

⁶ Institute of Physics, University of Aarhus, Aarhus, Denmark

⁷ On leave from the Institute of Physics, University of Aarhus

⁸ Attached to IN2P3 Paris, France

Dates

Received 15 December 1986

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Abstract

Delayed proton and gamma emissions following the beta decay of ³³Ar have been studied. From the calculated intensity of the feeding to the T = 3/2 analogue state in ³³C1, the proton intensities have been put on an absolute scale leading to a proton branching ratio of 38.7 ± 1.0%. A proton branch to the first excited state in ³²S at 2230.2 keV (1^π = 2⁺) with an intensity of 0.77 ± 0.10% was obtained from gamma singles and proton-gamma coincidence data. The complete spectroscopic information on ³³Ar allows the Gamow-Teller (GT) strength function from the gound state and up to 9.25 MeV excitation energy in ³³C1 to be deduced. The total strength observed in this interval is 2.90 in absolute units.

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