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Título : Study of the giant Gamow-Teller resonance in nuclear β-decay: The case of Ar-32
Autor : 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.
Palabras clave : 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
Fecha de publicación : 30-Sep-1985
Editor: Elsevier
Citación : Nuclear Physics A 443(2): 283-301 (1985)
Resumen: 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.
Descripción : 19 pages, 9 figures, 3 tables.
Versión del editor:
ISSN: 0375-9474
DOI: 10.1016/0375-9474(85)90264-7
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