The {sup 34,35}Al beta decay to {sup 34,35}Si

Journal Article · Tue Nov 16 04:00:00 EST 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1301737· OSTI ID:21207616

Nummela, S; Jokinen, A; Radivojevic, Z; Aeystoe, J ^[1]; Baumann, P; Caurier, E; Dessagne, Ph; Knipper, A; Miehe, Ch; Nowacki, F; Walter, G ^[2]; Ramdhane, M ^[3]

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1. Department of Physics, University of Jyvaeskylae, P. O. Box 35, Jyvaeskylae (Finland)
2. Institut de Recherches Subatomiques, BP28, F67037, Strasbourg (France)
3. Universite de Constantine, Constantine (Algeria)

The {sup 34,35}Al beta decay was studied at the CERN on-line mass-separator ISOLDE by {beta}-{gamma}, {beta}-{gamma}-{gamma} and {beta}-n measurements. In the {sup 34}Al decay, the new data confirm the previous results and complement the level scheme in {sup 34}Si and {sup 33}Si. An intruder (2p-2h) 0{sub 2}{sup +} state is proposed at 2.1 MeV in {sup 34}Si in agreement with different shell-model predictions but its decay is still unobserved. A {sup 35}Al{beta}-decay scheme to {sup 35}Si bound and unbound states is established. The {sup 35}Al half life (41.6(22) ms) was measured with a good precision. The first {sup 35}Si level scheme including three levels at 911, 974 and 2169 keV with respectively J{sup {pi}}=(3/2){sup -}, (3/2){sup +} and (5/2){sup +} was obtained. The spin and parity values are consistent with a (5/2){sup +} assignment for the {sup 35}Al ground state. The value P{sub n}=0.41(13) was also deduced. New information on the proton-neutron interaction in the (sd-fp) space is obtained.

• OSTI ID: 21207616
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 495; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ALUMINIUM 34
ALUMINIUM 35
BETA DECAY
GROUND STATES
KEV RANGE
MASS SPECTROSCOPY
MEV RANGE
NUCLEAR STRUCTURE
PARITY
PROTON-NEUTRON INTERACTIONS
SHELL MODELS
SILICON 33
SILICON 34
SILICON 35
SPIN