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Cross sections and reaction rates for /sup 23/Na(p,n) /sup 23/Mg, /sup 27/Al(p,n) /sup 27/Si, /sup 27/Al(. cap alpha. ,n) /sup 30/P, /sup 29/Si(. cap alpha. ,n) /sup 32/S, and /sup 30/Si(. cap alpha. ,n) /sup 33/S

Journal Article · · Phys. Rev., C; (United States)
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The total neutron production cross sections for the /sup 23/Na(p,n)/sup 23/Mg, /sup 27/Al(p,n)/sup 27/Si, /sup 27/Al(..cap alpha..,n)/sup 30/P, /sup 29/Si(..cap alpha..,n)/sup 32/S, and /sup 30/Si(..cap alpha..,n)/sup 33/S reactions have been measured for bombarding energies from threshold to 6.3 MeV. The neutron detector was a 60-cm diameter sphere of polyethylene with eight /sup 10/BF/sub 3/ counters and was insensitive to the angle and energy of the emitted neutrons. Cross sections for inverse reactions have been obtained using the principle of detailed balance. The data have been used to determine parameters for statistical model calculations to facilitate extrapolation of cross sections to higher bombarding energies. These reactions are relevant to problems of nucleosynthesis and stellar evolution and to studies of radiation damage. Nucleosynthesis reaction rates, N/sub A/(sigmav), were determined for the reactions studied and are tabulated for temperatures ranging from 0.4 x 10/sup 9/ to 10.0 x 10/sup 9/ K.
Research Organization:
University of Kentucky, Lexington, Kentucky 40506
OSTI ID:
6685209
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:4; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651425* -- Nuclear Properties & Reactions
A=20-38
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA REACTIONS
ALUMINIUM 27 TARGET
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DETAILED BALANCE PRINCIPLE
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
HADRON REACTIONS
HADRONS
INTERACTIONS
INVARIANCE PRINCIPLES
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 23
MAGNESIUM ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 01-10
MINUTES LIVING RADIOISOTOPES
MULTI-NUCLEON TRANSFER REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUCLEOSYNTHESIS
ODD-ODD NUCLEI
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOSPHORUS 30
PHOSPHORUS ISOTOPES
PROTON REACTIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SILICON 27
SILICON 29 TARGET
SILICON 30 TARGET
SILICON ISOTOPES
SODIUM 23 TARGET
STABLE ISOTOPES
STATISTICAL MODELS
SULFUR 32
SULFUR 33
SULFUR ISOTOPES
T INVARIANCE
TARGETS
THREE-NUCLEON TRANSFER REACTIONS
TOTAL CROSS SECTIONS
TRANSFER REACTIONS