Measurement of the {sup 8}Li(n,{gamma}){sup 9}Li cross section at astrophysical energies by reverse kinematics
- National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-1321 (United States)
- National Superconducting Cyclotron Laboratory and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824 (United States)
- Rikkyo University, 3 Nishi-Ikebukuro, Toshima, Tokyo171 (Japan)
- Department of Atomic Physics, Eoetvoes Lorand University, H-1088Puskin uta 5-7, Budapest (Hungary)
- KFKI Research Institute for Particle and Nuclear Physics, H-1525Budapest 114 (Hungary)
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
- CFET, Av. Sete de Setembro 3165 80230-901,Curitiba, Pr (Brazil)
We have made the first attempt at determining the {sup 8}Li(n,{gamma}){sup 9}Li cross section at astrophysical energies. This reaction competes with the {sup 8}Li({alpha},n){sup 11}B reaction in the inhomogeneous big bang model and with {sup 8}Li {beta} decay in the r process. It may affect the primordial abundance and the stellar production of A{gt}12 nuclei. Using a radioactive beam of {sup 9}Li and the Coulomb dissociation method we attempted to measure the cross section of the inverse reaction {sup 9}Li({gamma},n){sup 8}Li. We report only an upper limit because we were unable to determine and subtract the nuclear dissociation. Through the detailed balance theorem, this lead to an upper limit for the cross section of interest, {sup 8}Li(n,{gamma}){sup 9}Li. The limit is 19{plus_minus}8 b for E{sub n} = 0{endash}500 keV or, when expressed as a reaction rate, 7200cm{sup 3}s{sup {minus}1}mole{sup {minus}1}. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 574013
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 57; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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