Total cross sections and thermonuclear reaction rates for [sup 9]Be([alpha],[ital n])[sup 12]C

Journal Article · Tue Feb 01 04:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.1205· OSTI ID:5194665

Wrean, P R; Brune, C R; Kavanagh, R W ^[1]

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1. W. K. Kellogg Radiation Laboratory, 106-38, California Institute of Technology, Pasadena, California 91125 (United States)

The [sup 9]Be([alpha],[ital n])[sup 12]C reaction determines the rate for neutron-catalyzed helium burning and thus plays an important role in supernovae ejecta under [alpha]- and [ital n]-rich conditions which may lead to the [ital r] process. Cross sections for this reaction have been measured for 0.16[le][ital E][sub c.m.][le]1.87 MeV using a 4[pi] neutron detector, and are used to calculate the thermonuclear reaction rates for temperatures between 0.1 and 10 GK. During these measurements, the thick-target yields were determined for 0.50[le][ital E][sub [alpha]][le]2.30 MeV, the stopping powers for [alpha]'s in beryllium determined for 0.24[le][ital E][sub [alpha]][le]2.12 MeV, and the [sup 9]Be([ital p],[ital p]) elastic scattering cross sections measured at [theta][sub lab]=142.4[degree] for 2.34[le][ital E][sub [ital p]][le]2.66 MeV.

• OSTI ID: 5194665
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
BARYON REACTIONS
BARYONS
BERYLLIUM 9 TARGET
CARBON 12
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIRECT REACTIONS
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY RANGE
ERUPTIVE VARIABLE STARS
EVEN-EVEN NUCLEI
FERMIONS
HADRON REACTIONS
HADRONS
HELIUM BURNING
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
LIGHT NUCLEI
MEV RANGE
MEV RANGE 01-10
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUCLEOSYNTHESIS
PROTON REACTIONS
SCATTERING
STABLE ISOTOPES
STAR BURNING
STARS
STOPPING POWER
SUPERNOVAE
SYNTHESIS
TARGETS
THERMONUCLEAR REACTIONS
TOTAL CROSS SECTIONS
TRANSFER REACTIONS
VARIABLE STARS