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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/12279
Title: Study of the giant Gamow-Teller resonance in nuclear β-decay: The case of Ar-32
Authors: Björnstad, T.; García Borge, María José; Dessagne, P.; Von Dincklage, R.-D.; Ewan, G. T.; Hansen, P. G.; Huck, A.; Jonson, B.; Klotz, G.; Knipper, A.; Larsson, P. O.; Nyman, G.; Ravn, H. L.; Richard-Serre, C.; Riisager, K.; Schardt, D.; Walter, G.
Keywords: Radioactivity Ar-32 (β+p) [from Ca-40 (p,3p6n) reaction]
Measured β-delayed Ep, Ip, Eγ, Iγ, pγ-coin
Ar-32 deduced T1/2 , proton branching ratio, β strength function
CaO target, Ge, surface barrier Si, CsI detectors
On-line mass separation
Issue Date: 30-Sep-1985
Publisher: Elsevier
Citation: Nuclear Physics A 443(2): 283-301 (1985)
Abstract: Delayed proton and gamma emissions following the β-decay of Ar-32 have been studied. The half-life of Ar-32 is 98 ± 2 ms, and the T = 2 analogue state in Cl-32 lies at the excitation energy 5036 ± 12 keV. From the intensity of the feeding to this state the proton intensities can be converted to an absolute scale leading to a total proton branching ratio of (43 ± 3)%. From proton-gamma coincidence measurements it emerges that (1.9 ± 0.2)% of the protons lead to the first-excited state in S-31. A level scheme up to 8.75 MeV excitation in Cl-32 has been constructed and the Gamow-Teller strength function has been deduced. The result is a renormalization of the axial-vector strength to (49 ± 5)% of the free-nucleon value.
Description: 19 pages, 9 figures, 3 tables.
Publisher version (URL): http://dx.doi.org/10.1016/0375-9474(85)90264-7
URI: http://hdl.handle.net/10261/12279
ISSN: 0375-9474
DOI: 10.1016/0375-9474(85)90264-7
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