31Ar and 27S: Beta-delayed two-proton emission and mass-excess
Creators
- 1. Paris-11 Univ., 91 - Orsay (France). Inst. de Physique Nucleaire
- 2. Grand Accelerateur National d'Ions Lourds (GANIL), 14 - Caen (France)
- 3. Institut de Physique Nucleaire, Paris-11 Univ., 91 - Orsay (France)
- 4. ISMRa, 14 - Caen (France). Lab. de Physique Corpusculaire
- 5. Bordeaux-1 Univ., 33 - Gradignan (France). Centre d'Etudes Nucleaires
- 6. Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)
Description
Beta-delayed two-proton decay is reported for the Tz = -5/2 isotopes 31Ar and 27S which were produced by fragmentation of 36Ar at 85 MeV/u. The two-proton nature of this decay is established on the basis of the number of events which trigger two detectors or more in a silicon-detector telescope. The proton energy spectra give experimental values for the daughter energy levels and for the branching ratios. The deduced values of the 31Ar and 27S masses are discussed and compared with mass predictions. For both nuclei, other channels like β3p and βpα are to be searched for since the observed β2p and βp branches do not fully account for the total decay width of the isobaric analog states in the daughter nuclei. Partial decay schemes are proposed for 31Ar and 27S
Availability note (English)
MF available from INIS under the Report Number.Files
23003427.pdf
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Additional details
Publishing Information
- Imprint Pagination
- 29 p.
- Report number
- IPNO-DRE--91-04
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 23003427
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ARGON 31; ARGON 36; BETA PARTICLES; BRANCHING RATIO; DELAYED PROTONS; GANIL CYCLOTRON; GEV RANGE 01-10; MASS; NUCLEAR FRAGMENTATION; RADIATION DETECTION; RADIOACTIVITY; SEMILEPTONIC DECAY; SULFUR 27
- Descriptors DEC
- ACCELERATORS; ARGON ISOTOPES; BARYONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CATIONS; CHARGED PARTICLES; CYCLIC ACCELERATORS; CYCLOTRONS; DECAY; DETECTION; ELEMENTARY PARTICLES; ENERGY RANGE; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FERMIONS; GEV RANGE; HADRONS; HEAVY ION ACCELERATORS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; IONIZING RADIATIONS; IONS; ISOCHRONOUS CYCLOTRONS; ISOTOPES; LIGHT NUCLEI; MILLISEC LIVING RADIOISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; PARTICLE DECAY; PROTONS; RADIATIONS; RADIOISOTOPES; STABLE ISOTOPES; SULFUR ISOTOPES; WEAK PARTICLE DECAY