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Title

Study of the giant Gamow-Teller resonance in nuclear β-decay: The case of Ar-32

AuthorsBjörnstad, T.; García Borge, María José CSIC ORCID; 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.
KeywordsRadioactivity Ar-32 (β+p) [from Ca-40 (p,3p6n) reaction]
Measured β-delayed Ep, Ip, Eγ, Iγ, pγ-coin
Ar-32 deduced T1/2
CaO target
On-line mass separation
Proton branching ratio
β strength function
Ge
Surface barrier Si
CsI detectors
Issue Date30-Sep-1985
PublisherElsevier
CitationNuclear Physics A 443(2): 283-301 (1985)
AbstractDelayed 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.
Description19 pages, 9 figures, 3 tables.
Publisher version (URL)http://dx.doi.org/10.1016/0375-9474(85)90264-7
URIhttp://hdl.handle.net/10261/12279
DOI10.1016/0375-9474(85)90264-7
ISSN0375-9474
Appears in Collections:(CFMAC-IEM) Artículos

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