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 · Sun Oct 01 00:00:00 EDT 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.18.1566· OSTI ID:6685209

Flynn, D S; Sekharan, K K; Hiller, B A; Laumer, H; Weil, J L; Gabbard, F

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), Vol. 18:4
• Country of Publication: United States
• Language: English

Related Subjects

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