| Hem > The $\beta$2p -decay mechanism of $^{31}$Ar |
| Article | |
| Title | The $\beta$2p -decay mechanism of $^{31}$Ar |
| Author(s) |
Fynbo, H O U ; García-Borge, M J ; Axelsson, L ; Äystö, J ; Bergmann, U C ; Fraile-Prieto, L M ; Honkanen, J A ; Hornshøj, P ; Jading, Y ; Jokinen, A ; Jonson, B ; Martel, I ; Mukha, I ; Nilsson, T ; Nyman, G H ; Oinonen, M ; Piqueras, I ; Riisager, K ; Siiskonen, T ; Smedberg, M H ; Tengblad, O ; Thaysen, J ; Wenander, F |
| Affiliation | (CERN) |
| Publication | 2000 |
| Imprint | 2000 |
| In: | Nucl. Phys. A 677 (2000) 38-60 |
| DOI | 10.1016/S0375-9474(00)00248-7 |
| Subject category | Nuclear Physics - Experiment |
| Accelerator/Facility, Experiment | CERN ISOLDE ; IS339 |
| Abstract | We have measured the $\beta$-decay of $^{31}$Ar with a high granularity setup sensitive to multiparticle decay branches. Two-proton emission is observed from the isobaric analog state in $^{31}$Cl to the four lowest states in $^{29}$P 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 $^{30}$S 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. (44 refs). |