Unbound states of (32)Cl andthe (31)S(p,gamma)(32)Cl reaction rate

Journal Article · Sat Jan 01 04:00:00 EST 2011 · Physical Review, C (Nuclear Physics)

OSTI ID:1037062

Matos, M ^[1]; Blackmon, Jeff C ^[2]; Linhardt, Laura ^[1]; Bardayan, Daniel W ^[2]; Nesaraja, Caroline D ^[2]; Clark, Jason ^[3]; Diebel, C ^[4]; O'Malley, Patrick ^[5]; Parker, P D ^[4]

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1. Louisiana State University
2. ORNL
3. Argonne National Laboratory (ANL)
4. Yale University
5. Rutgers University

The {sup 31}S(p,{gamma}){sup 32}Cl reaction is expected to provide the dominant break-out path from the SiP cycle in novae and is important for understanding enrichments of sulfur observed in some nova ejecta. We studied the {sup 32}S(3He,t){sup 32}Cl charge-exchange reaction to determine properties of proton-unbound levels in {sup 32}Cl that have previously contributed significant uncertainties to the {sup 31}S(p,{gamma}){sup 32}Cl reaction rate. Measured triton magnetic rigidities were used to determine excitation energies in {sup 32}Cl. Proton-branching ratios were obtained by detecting decay protons from unbound {sup 32}Cl states in coincidence with tritons. An improved {sup 31}S(p,{gamma}){sup 32}Cl reaction rate was calculated including robust statistical and systematic uncertainties.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1037062
• Journal Information: Physical Review, C (Nuclear Physics), Journal Name: Physical Review, C (Nuclear Physics) Journal Issue: 5 Vol. 84
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGE-EXCHANGE REACTIONS
DECAY
EXCITATION
NOVAE
PROTONS
REACTION KINETICS
SULFUR
TRITONS