Measurement and theoretical analysis of neutron elastic scattering and inelastic reactions leading to a three-body final state for {sup 6}Li at 10 to 20 MeV
- Japan Atomic Energy Research Institute, Tokai, Naka, Ibaraki 319-1195 (Japan)
- Science and Technology Agency, Chiyoda-ku, Tokyo 100-8966 (Japan)
- Tohoku University, Sendai, Miyagi 980-77 (Japan)
- Netherlands Energy Research Foundation ECN, 1755 ZG Petten (The Netherlands)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
The neutron elastic and inelastic scattering double-differential cross sections of {sup 6}Li were measured at incident neutron energies of 11.5, 14.1, and 18.0 MeV. A phenomenological neutron optical model potential of {sup 6}Li was constructed to describe the total and elastic scattering cross sections from 5 MeV to several tens MeV, based on the present data together with information from other works. This potential was found to describe the inelastic scattering to the first excited state (E{sub x}=2.186 MeV) well via the distorted-wave Born approximation (DWBA) calculation with the macroscopic vibrational model. The continuum neutron energy spectra and angular distributions were then analyzed by the theory of final-state interaction extended to the DWBA form, with an assumption that the d-{alpha} interaction is dominant in the three-body final state consisting of n, d, and {alpha} particles. Such a calculation was found to be successful in explaining the major part of the low-excitation neutron spectra and angular distribution down to the {ital Q}-value region of {minus}9 MeV, except for the {ital Q}-value range where the n-{alpha} quasifree scattering will give a non-negligible contribution at forward angles. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 659344
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 58; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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