Weak-coupling structure of proton resonant states in 23Al studied with RI beam at CNS

Journal Article · Wed Jul 12 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2234437· OSTI ID:20877454

He, J J; Kubono, S; Teranishi, T; Notani, M; Michimasa, S; Baba, H; Nishimura, S; Nishimura, M; Yanagisawa, Y; Hokoiwa, N; Kibe, M; Gono, Y; Moon, J Y; Lee, J H; Lee, C S; Iwasaki, H; Kato, S ^[1]

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1. Center of Nuclear Study (CNS), University of Tokyo, RIKEN Campus, Wako, Saitama 351-0198 (Japan)

Proton resonances in 23Al have been investigated for the first time by the resonant elastic and inelastic scattering of 22Mg+p by using a 4.38 MeV/nucleon 22Mg beam bombarding a thick Hydrogen target. The low-energy 22Mg beam was separated by the CNS radioactive ion beam separator (CRIB). A new resonant state due to elastic scattering was observed at Ex = 3.00 MeV with a J{pi} = (3/2+) assignment. Other three excited states due to resonant inelastic scattering at 3.14, 3.26 and 3.95 MeV were identified and all mainly decay to the first excited state in 22Mg by the proton emissions. The newly observed 3.95-MeV state probably has a spin-parity of J{pi} = (7/2+). The resonant properties were determined from an R-matrix analysis of the excitation functions. The weak-coupling structure in 23Al is discussed in conjunction with a shell-model calculation.

• OSTI ID: 20877454
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 847; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALUMINIUM 23
ELASTIC SCATTERING
EXCITATION FUNCTIONS
EXCITED STATES
HEAVY ION REACTIONS
HYDROGEN 1 TARGET
INELASTIC SCATTERING
MAGNESIUM 22
MEV RANGE
NUCLEAR DECAY
PARITY
PROTON-NUCLEON INTERACTIONS
PROTONS
R MATRIX
RADIOACTIVE ION BEAMS
RESONANCE
SHELL MODELS
SPIN