TY - JOUR

T1 - Measurement and theoretical analysis of neutron elastic scattering and inelastic reactions leading to a three-body final state for [Formula Presented] at 10 to 20 MeV

AU - Chiba, S.

AU - Togasaki, K.

AU - Ibaraki, M.

AU - Baba, M.

AU - Matsuyama, S.

AU - Hirakawa, N.

AU - Shibata, K.

AU - Iwamoto, O.

AU - Koning, A. J.

AU - Hale, G. M.

AU - Chadwick, M. B.

PY - 1998/1/1

Y1 - 1998/1/1

N2 - The neutron elastic and inelastic scattering double-differential cross sections of [Formula Presented] were measured at incident neutron energies of 11.5, 14.1, and 18.0 MeV. A phenomenological neutron optical model potential of [Formula Presented] 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 [Formula Presented] 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 [Formula Presented] interaction is dominant in the three-body final state consisting of [Formula Presented] and α 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 Q-value region of [Formula Presented] except for the Q-value range where the [Formula Presented] quasifree scattering will give a non-negligible contribution at forward angles.

AB - The neutron elastic and inelastic scattering double-differential cross sections of [Formula Presented] were measured at incident neutron energies of 11.5, 14.1, and 18.0 MeV. A phenomenological neutron optical model potential of [Formula Presented] 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 [Formula Presented] 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 [Formula Presented] interaction is dominant in the three-body final state consisting of [Formula Presented] and α 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 Q-value region of [Formula Presented] except for the Q-value range where the [Formula Presented] quasifree scattering will give a non-negligible contribution at forward angles.

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U2 - 10.1103/PhysRevC.58.2205

DO - 10.1103/PhysRevC.58.2205

M3 - Article

AN - SCOPUS:0032335949

VL - 58

SP - 2205

EP - 2216

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 4

ER -