Reaction mechanism of [sup 7]Li([sup 3]He,[ital p])[sup 9]Be and [sup 7]Li([sup 3]H,[ital n])[sup 9]Be and primordial nucleosynthesis of [sup 9]Be

Journal Article · Sun Jan 31 23:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.846· OSTI ID:6889192

Yamamoto, Y; Kajino, T; Kubo, K ^[1]

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1. Department of Physics, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachiohji, Tokyo 192-03 (Japan)

We investigate in a unified way the reaction mechanism of [sup 7]Li([sup 3]H,[ital n])[sup 9]Be and [sup 7]Li([sup 3]He, [ital p])[sup 9]Be at the low energies [ital E][sub c.m.][le]2 MeV of astrophysical interest. Assuming charge independence of the nuclear reaction amplitudes and taking account of the effects from different isospin contribution, Coulomb interaction, and associated kinematical conditions properly, we constrain the upper and lower bounds of the total cross section of [sup 7]Li([sup 3]H,[ital n])[sup 9]Be theoretically by using knowledge of the [sup 7]Li([sup 3]He, [ital p])[sup 9]Be reaction. It is found that the total cross section of [sup 7]Li([sup 3]H,[ital n])[sup 9]Be at Gamow window energy [ital E][similar to]250 keV is dominated by the near-threshold [ital T]=1 resonance whose resonance parameters are not determined at all experimentally, although the direct reaction process makes progressively important contributions at higher energies 500 keV[le][ital E][sub c.m.]. Primordial abundance of [sup 9]Be calculated in the inhomogeneous and standard big-bang models by using the inferred reaction cross section for [sup 7]Li([sup 3]H,[ital n])[sup 9]Be is compared with recent results of astronomical observations.

• OSTI ID: 6889192
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663300* -- Nuclear Reactions & Scattering
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
BARYONS
BERYLLIUM 9
BERYLLIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-ODD NUCLEI
FERMIONS
HADRONS
HELIUM 3 REACTIONS
INTEGRAL CROSS SECTIONS
ISOTOPES
LIGHT NUCLEI
LITHIUM 7 TARGET
MEV RANGE
MEV RANGE 01-10
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
NUCLEOSYNTHESIS
PROTONS
STABLE ISOTOPES
SYNTHESIS
TARGETS
TRANSFER REACTIONS
TRITON REACTIONS