TY - JOUR
T1 - Preequilibrium (n,n) cross sections on nuclei around atomic number 50 at En=14.1 MeV
AU - Watanabe, Y.
AU - Kumabe, I.
AU - Hyakutake, M.
AU - Takahashi, A.
AU - Sugimoto, H.
AU - Ichimura, E.
AU - Sasaki, Y.
PY - 1988
Y1 - 1988
N2 - The energy spectra of neutrons emitted from 14.1-MeV-neutron-induced reactions on Ag, Cd, In, Sn, Sb, and Te were measured at 70° in order to investigate the shell and odd-even effects in the preequilibrium (n,n) process. The cross sections integrated over the outgoing energies of 710 MeV, where the preequilibrium process is dominant, increased monotonically with increasing atomic numbers of all scatterers except Te. The results of calculations based on the exciton model showed an underestimation in 710 MeV only for Te. This underestimation could be explained by taking into account the contribution from the collective excitations of the low energy octupole resonance by the direct process. As a result, it was found that there were no appreciable shell and odd-even effects in the preequilibrium (n,n) process that leaves the residual nucleus into the continuum region.
AB - The energy spectra of neutrons emitted from 14.1-MeV-neutron-induced reactions on Ag, Cd, In, Sn, Sb, and Te were measured at 70° in order to investigate the shell and odd-even effects in the preequilibrium (n,n) process. The cross sections integrated over the outgoing energies of 710 MeV, where the preequilibrium process is dominant, increased monotonically with increasing atomic numbers of all scatterers except Te. The results of calculations based on the exciton model showed an underestimation in 710 MeV only for Te. This underestimation could be explained by taking into account the contribution from the collective excitations of the low energy octupole resonance by the direct process. As a result, it was found that there were no appreciable shell and odd-even effects in the preequilibrium (n,n) process that leaves the residual nucleus into the continuum region.
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U2 - 10.1103/PhysRevC.37.963
DO - 10.1103/PhysRevC.37.963
M3 - Article
AN - SCOPUS:0001749229
VL - 37
SP - 963
EP - 968
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 3
ER -