The β2p decay mechanism of 31Ar

✍ Scribed by H.O.U. Fynbo; M.J.G. Borge; L. Axelsson; J. Äystö; U.C. Bergmann; L.M. Fraile; A. Honkanen; P. Hornshøj; Y. Jading; A. Jokinen; B. Jonson; I. Martel; I. Mukha; T. Nilsson; G. Nyman; M. Oinonen; I. Piqueras; K. Riisager; T. Siiskonen; M.H. Smedberg; O. Tengblad; J. Thaysen; F. Wenander

• Book ID: 104333631
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 571 KB
• Volume: 677
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)00248-7

✦ Synopsis

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 β-delayed one-proton branches together with the two-proton data provide precise information about the beta-strength distribution up to 15 MeV excitation energy.