Abstract
The results, obtained with an appropriately modified version of the PENELOPE code, in which angular momentum and parity conservation were taken into account, were supplemented with Hauser-Feshbach calculations to account for equilibrium contribution and second chance emission. Thus, total emission spectra and angular distributions for neutrons and protons, as well as, various reaction cross sections were obtained. Double-differential cross sections were calculated with the two-component excitation model (microscopic excitation level densities accounting for neutron-proton distinction and pairing effects were used throughout), while the compound nucleus contribution was assumed isotropic. The calculations of state densities were carried out in the space of single particle orbitals by Nix and Moller. Values of the pairing strength parameter were determined from mass differences and considered configuration independent. Experimental neutron spectra, emitted in the interaction of 14 MeV neutrons with Al, Zr and Nb, were compared with the predictions of the one- and two-gas models. Results with the two-gas model presented a significant improvement with respect to the one-gas version.
Citation Formats
Reffo, G, Zhingang, G, Herman, M, and Costa, C.
Nuclear reactions in terms of two-component excitation model with realistic state densities.
Italy: N. p.,
1991.
Web.
Reffo, G, Zhingang, G, Herman, M, & Costa, C.
Nuclear reactions in terms of two-component excitation model with realistic state densities.
Italy.
Reffo, G, Zhingang, G, Herman, M, and Costa, C.
1991.
"Nuclear reactions in terms of two-component excitation model with realistic state densities."
Italy.
@misc{etde_10121894,
title = {Nuclear reactions in terms of two-component excitation model with realistic state densities}
author = {Reffo, G, Zhingang, G, Herman, M, and Costa, C}
abstractNote = {The results, obtained with an appropriately modified version of the PENELOPE code, in which angular momentum and parity conservation were taken into account, were supplemented with Hauser-Feshbach calculations to account for equilibrium contribution and second chance emission. Thus, total emission spectra and angular distributions for neutrons and protons, as well as, various reaction cross sections were obtained. Double-differential cross sections were calculated with the two-component excitation model (microscopic excitation level densities accounting for neutron-proton distinction and pairing effects were used throughout), while the compound nucleus contribution was assumed isotropic. The calculations of state densities were carried out in the space of single particle orbitals by Nix and Moller. Values of the pairing strength parameter were determined from mass differences and considered configuration independent. Experimental neutron spectra, emitted in the interaction of 14 MeV neutrons with Al, Zr and Nb, were compared with the predictions of the one- and two-gas models. Results with the two-gas model presented a significant improvement with respect to the one-gas version.}
place = {Italy}
year = {1991}
month = {Dec}
}
title = {Nuclear reactions in terms of two-component excitation model with realistic state densities}
author = {Reffo, G, Zhingang, G, Herman, M, and Costa, C}
abstractNote = {The results, obtained with an appropriately modified version of the PENELOPE code, in which angular momentum and parity conservation were taken into account, were supplemented with Hauser-Feshbach calculations to account for equilibrium contribution and second chance emission. Thus, total emission spectra and angular distributions for neutrons and protons, as well as, various reaction cross sections were obtained. Double-differential cross sections were calculated with the two-component excitation model (microscopic excitation level densities accounting for neutron-proton distinction and pairing effects were used throughout), while the compound nucleus contribution was assumed isotropic. The calculations of state densities were carried out in the space of single particle orbitals by Nix and Moller. Values of the pairing strength parameter were determined from mass differences and considered configuration independent. Experimental neutron spectra, emitted in the interaction of 14 MeV neutrons with Al, Zr and Nb, were compared with the predictions of the one- and two-gas models. Results with the two-gas model presented a significant improvement with respect to the one-gas version.}
place = {Italy}
year = {1991}
month = {Dec}
}