Beta-decay studies of nuclei far from stability near N=28

Journal Article · Sun Feb 05 00:00:00 EST 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.47393· OSTI ID:165216

Sorlin, O ^[1]; Anne, R ^[2]; Axelsson, L ^[1]; Bazin, D ^[2]; Boehmer, W ^[3]; Borrel, V; Guillemaud-Mueller, D ^[1]; Jading, Y ^[3]; Keller, H ^[1]; Kratz, K ^[3]; Lewitowicz, M ^[2]; Lukyanov, S M ^[4]; Mehren, T ^[3]; Mueller, A C ^[1]; Penionzhkevich, Y E ^[4]; Pfeiffer, B ^[3]; Pougheon, F ^[1]; Saint-Laurent, M G ^[2]; Salamatin, V S ^[4]; Schoedder, S ; Woehr, A ^[3]

---

1. Institut de Physique Nucleaire, F-91406 ORSAY (France)
2. Grand Accelerateur National d`Ions Lourds (GANIL), BP-5027, F-14021 CAEN (France)
3. Institut fuer Kernchemie, Universitaet Mainz, D-6500 MAINZ (Germany)
4. Laboratory of Nuclear Reactions, JINR, POB 79, DUBNA (Russian Federation)

Beta-decay half-lives and {beta}-delayed neutron-emission probabilities of the very neutron-rich nuclei {sup 43}P, {sup 42,44,45}S and {sup 44-46}Cl, {sup 47}Ar have been recently measured. These isotopes, which lie at or close to the N=28 magic shell were produced at GANIL in interactions of a 60 MeV/u {sup 48}Ca beam with a {sup 64}Ni target, and were separated by the doubly achromatic spectrometer LISE3. Their decay was studied by a {beta} or {beta}-n time correlation measurement. The results are compared to recent model predictions and indicate a rapid weakening of the N=28 shell below {sup 48}{sub 20}Ca{sub 28}. The nuclear structure effects reflected in the decay properties of the exotic S and Cl isotopes may be the clue for the astrophysical understanding of the unusual {sup 48}Ca/{sup 46}Ca abundance ratio measured in the solar system, or observed in EK-inclusions of the Allende meteorite. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• Sponsoring Organization: USDOE
• OSTI ID: 165216
• Report Number(s): CONF-9407131-; ISSN 0094-243X; TRN: 96:001915
• Journal Information: AIP Conference Proceedings, Vol. 327, Issue 1; Conference: 3. international symposium on nuclear astrophysics, Assergi (Italy), 8-13 Jul 1994; Other Information: PBD: 5 Feb 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
NEUTRON-RICH ISOTOPES
BETA DECAY
STABILITY
BETA-DELAYED NEUTRONS
NUCLEAR STRUCTURE
NUCLEOSYNTHESIS
R PROCESS
NEUTRON REACTIONS
CAPTURE