Abstract
The EFF-2 {sup 9}Be evaluation cross sections has been modified by changing its representation of energy-angle correlated neutron distributions stemming from the (n,2n) reaction. The presence of a sharp peak on top of a continuum distribution is a feature not encountered in other existing evaluations. Therefore processing tools cannot easily deal with this feature. A solution was found by representing part of the (n,2n) cross section as inelastic scattering (followed by neutron deexcitation) through the 2.429 MeV level in {sup 9}Be. Processing with existing tools leads to correct scattering matrices, but care has to be taken to ensure that the total (n,2n) cross section is obtained by explicit summation of two components indicated by MT16 and MT51. (author). 8 refs., 1 fig.
Hogenbirk, A;
Gruppelaar, H;
Nierop, D
[1]
- Netherlands Energy Research Foundation (ECN), Petten (Netherlands)
Citation Formats
Hogenbirk, A, Gruppelaar, H, and Nierop, D.
Modifications of the EFF-2 {sup 9}Be evaluation.
Netherlands: N. p.,
1992.
Web.
Hogenbirk, A, Gruppelaar, H, & Nierop, D.
Modifications of the EFF-2 {sup 9}Be evaluation.
Netherlands.
Hogenbirk, A, Gruppelaar, H, and Nierop, D.
1992.
"Modifications of the EFF-2 {sup 9}Be evaluation."
Netherlands.
@misc{etde_10145455,
title = {Modifications of the EFF-2 {sup 9}Be evaluation}
author = {Hogenbirk, A, Gruppelaar, H, and Nierop, D}
abstractNote = {The EFF-2 {sup 9}Be evaluation cross sections has been modified by changing its representation of energy-angle correlated neutron distributions stemming from the (n,2n) reaction. The presence of a sharp peak on top of a continuum distribution is a feature not encountered in other existing evaluations. Therefore processing tools cannot easily deal with this feature. A solution was found by representing part of the (n,2n) cross section as inelastic scattering (followed by neutron deexcitation) through the 2.429 MeV level in {sup 9}Be. Processing with existing tools leads to correct scattering matrices, but care has to be taken to ensure that the total (n,2n) cross section is obtained by explicit summation of two components indicated by MT16 and MT51. (author). 8 refs., 1 fig.}
place = {Netherlands}
year = {1992}
month = {Jul}
}
title = {Modifications of the EFF-2 {sup 9}Be evaluation}
author = {Hogenbirk, A, Gruppelaar, H, and Nierop, D}
abstractNote = {The EFF-2 {sup 9}Be evaluation cross sections has been modified by changing its representation of energy-angle correlated neutron distributions stemming from the (n,2n) reaction. The presence of a sharp peak on top of a continuum distribution is a feature not encountered in other existing evaluations. Therefore processing tools cannot easily deal with this feature. A solution was found by representing part of the (n,2n) cross section as inelastic scattering (followed by neutron deexcitation) through the 2.429 MeV level in {sup 9}Be. Processing with existing tools leads to correct scattering matrices, but care has to be taken to ensure that the total (n,2n) cross section is obtained by explicit summation of two components indicated by MT16 and MT51. (author). 8 refs., 1 fig.}
place = {Netherlands}
year = {1992}
month = {Jul}
}