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Closed Access item The beta 2p decay mechanism of Ar-31

Other Titles:The β2p decay mechanism of Ar-31
Authors:Fynbo, H. O. U.
García Borge, María José
Axelsson, L.
Äystö, J.
Bergmann, U. C.
Fraile, Luis M.
Honkanen, A.
Hornshøj, P.
Jading, Y.
Jokinen, A.
Jonson, B.
Martel, Ismael
Mukha, I.
Nilsson, T.
Nyman, G.
Oinonen, M.
Piqueras, Inmaculada
Riisager, K.
Siiskonen, T.
Smedberg, M. H.
Tengblad, Olof
Thaysen, J.
Wenander, F.
Keywords:Ar-31(β(+)(p)) [from Ca(p,3pxn) reaction], Measured β-delayed protons E-p, E-2p, pp energy and angular correlations, Ar-31 deduced β1p and β2p decay channels, S-30, Cl-31 deduced levels, T, π, branching ratios, CaO target, On-line mass separation, Double sided Si strip detector, Si p-i-n detectors, Surface barrier Si detector, Delayed 2-proton emission, Proton emission, Radioactivity, Nuclei, Ca-35, Modes, Al-22, Be-6
Issue Date:15-Aug-2000
Series/Report no.:Nuclear Physics A 677(1-4): 38–60 (2000)
Abstract:We have measured the beta-decay of Ar-31 with a high granularity setup sensitive to multiparticle decay branches. Two-proton emission is observed from the isobaric analog state in Cl-31 to the four lowest states in P-29 and furthermore from a large number of states fed in Gamow-Teller transitions. The mechanism of two-proton emission is studied via energy and angular correlations between the two protons. In all cases the mechanism is found to be sequential yielding information about states in S-30 up to 8 MeV excitation energy. Improved data on the beta-delayed one-proton branches together with the two-proton data provide precise information about the beta-strength distribution up to 15 MeV excitation energy.
Description:23 pages, 10 figures.-- PACS nrs.: 23.40.Hc; 27.30.+t.-- Printed version published on Sep 11, 2000.
Publisher version (URL):http://dx.doi.org/10.1016/S0375-9474(00)00248-7
URI:http://hdl.handle.net/10261/9840
ISSN:0375-9474
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Appears in Collections:(CFMAC-IEM) Artículos

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