Structure of {sup 23}Al from the one-proton breakup reaction and astrophysical implications

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.015803· OSTI ID:21596622

Banu, A; Trache, L; Simmons, E; Tribble, R E ^[1]; Carstoiu, F; Negoita, F; Rotaru, F ^[2]; Achouri, N L; Laurent, B; Orr, N A; Roeder, B T ^[3]; Bonaccorso, A ^[4]; Catford, W N; Patterson, N; Thomas, J S ^[5]; Chartier, M; Dimmock, M; Fernandez-Dominguez, B; Paschalis, S; Paul, E S ^[6]

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1. Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)
2. National Institute of Physics and Nuclear Engineering ''Horia Hulubei'' (IFIN-HH), R-077125 Magurele-Bucharest (Romania)
3. LPC-ENSICAEN, IN2P3-CNRS et Universite de Caen, F-14050 Caen Cedex (France)
4. Istituto Nazionale di Fisica Nucleare, Sez. di Pisa, I-56127 Pisa (Italy)
5. Department of Physics, University of Surrey, Guildford GU2 5XH (United Kingdom)
6. Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)

The ground state of the proton-rich nucleus {sup 23} Al has been studied by one-proton removal on a carbon target at about 50 MeV/nucleon using the EXOGAM + SPEG experimental setup at GANIL. Longitudinal momentum distributions of the {sup 22}Mg breakup fragments, inclusive and in coincidence with {gamma} rays de-exciting the residues, were measured. The ground-state structure of {sup 23} Al is found to be a configuration mixing of a d-orbital valence proton coupled to four core states--0{sub gs}{sup +}, 2{sub 1}{sup +}, 4{sub 1}{sup +}, 4{sub 2}{sup +}. We confirm the ground state spin and parity of {sup 23} Al as J{sup {pi}=}5/2{sup +}. The measured exclusive momentum distributions are compared with extended Glauber model calculations to extract spectroscopic factors and asymptotic normalization coefficients (ANCs). The spectroscopic factors are presented in comparison with those obtained from large-scale shell model calculations. We determined the asymptotic normalization coefficient of the nuclear system {sup 23} Al{sub gs} {yields} {sup 22}Mg(0{sup +}) + p to be C{sub d5/2}{sup 2}({sup 23}Al{sub gs})=(3.90{+-}0.44)x10{sup 3} fm{sup -1}, and used it to infer the stellar reaction rate of the direct radiative proton capture {sup 22}Mg(p,{gamma}){sup 23} Al. Astrophysical implications related to {sup 22}Na nucleosynthesis in ONe novae and the use of one-nucleon breakup at intermediate energies as an indirect method in nuclear astrophysics are discussed.

• OSTI ID: 21596622
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 84, Issue 1; Other Information: DOI: 10.1103/PhysRevC.84.015803; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 23
ASYMPTOTIC SOLUTIONS
BREAKUP REACTIONS
CARBON
COMPUTERIZED SIMULATION
GAMMA DECAY
GANIL CYCLOTRON
GLAUBER THEORY
GROUND STATES
LONGITUDINAL MOMENTUM
MAGNESIUM 22
MEV RANGE 10-100
NUCLEAR FRAGMENTS
NUCLEOSYNTHESIS
PROTON REACTIONS
REACTION KINETICS
SHELL MODELS
SODIUM 22
SPECTROSCOPIC FACTORS
SPIN
ACCELERATORS
ALKALINE EARTH ISOTOPES
ALUMINIUM ISOTOPES
ANGULAR MOMENTUM
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
HADRON REACTIONS
HEAVY ION ACCELERATORS
ISOCHRONOUS CYCLOTRONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KINETICS
LIGHT NUCLEI
LINEAR MOMENTUM
MAGNESIUM ISOTOPES
MATHEMATICAL MODELS
MATHEMATICAL SOLUTIONS
MEV RANGE
MILLISECONDS LIVING RADIOISOTOPES
NANOSECONDS LIVING RADIOISOTOPES
NONMETALS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SIMULATION
SODIUM ISOTOPES
SYNTHESIS
YEARS LIVING RADIOISOTOPES