Li, Be, and B production in reactions of 45--100 MeV protons with /sup 12/C: Astrophysical implications. [''B//sup 10/B, B/Be, /sup 7/Li//sup 6/Li, Li/Be, Li/B abundance ratios]
Journal Article
·
· Phys. Rev., C; (United States)
Cross sections for the production of mass 6 to 11 isobars from proton spallation of carbon targets have been measured at bombarding energies of 45, 55, 60, 65, 75, and 100 MeV. Isotopic cross sections for Li and Be have also been measured at 100 MeV. The excitation functions for these reactions have been used to test theories of Li, Be, and B nucleosynthesis. The measured abundance ratios for /sup 11/B//sup 10/B and B/Be can be reproduced using the experimental cross sections and astrophysical models which propose LiBeB synthesis in nuclear reactions well above the threshold energy. In order to obtain the natural /sup 7/Li//sup 6/Li, Li/Be, and Li/B abundance ratios, however, it is concluded that a substantial amount of /sup 7/Li must be synthesized via some lower energy mechanism. (AIP)
- Research Organization:
- Cyclotron Laboratory and Department of Chemistry, University of Maryland, College Park, Maryland 20742
- OSTI ID:
- 7266744
- Journal Information:
- Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 14:2; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Related Subjects
640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
ASTROPHYSICS
BARYON REACTIONS
BERYLLIUM ISOTOPES
BORON ISOTOPES
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ENERGY RANGE
EXCITATION FUNCTIONS
HADRON REACTIONS
ISOTOPES
LITHIUM ISOTOPES
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEOSYNTHESIS
PROTON REACTIONS
SPALLATION
TARGETS
Radio & X-Ray Sources
651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
ASTROPHYSICS
BARYON REACTIONS
BERYLLIUM ISOTOPES
BORON ISOTOPES
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ENERGY RANGE
EXCITATION FUNCTIONS
HADRON REACTIONS
ISOTOPES
LITHIUM ISOTOPES
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEOSYNTHESIS
PROTON REACTIONS
SPALLATION
TARGETS