Measurements of Elastic Scattering Cross Sections of Carbon, Silicon, Iron, Zirconium and Lead for 75 MeV Neutrons

Abstract

We performed measurements of neutron elastic scattering cross sections of carbon, silicon, iron, zirconium and lead at 75 MeV using a 7 Li(p,n) quasi-monoenergetic neutron source at TIARA of JAERI. Neutron spectra at 25 laboratory angles between 2.6° and 53.0° were measured by a time-of-flight method (TOF) using five liquid scintillation detectors. The data were corrected for the inelastic scattering neutrons and sample size effects. The experimental data were compared with the neutron cross section libraries (DLCI I 9/HIL086, LA 150) and systematics used in cascade/transport codes (HETC-KFA2, NMTC/JAERI). The DLC 119 data and sytematics show large discrepancy from the present data, while the LA 150 data are in fair agreement.

Coupled-Channels Analysis of Nucleon Interaction Data of28'30Si up to 200 MeV Based on the Soft Rotator Model

“…6, the calculated angular distributions of neutron elastic scattering from 28 Si are compared with the experimental data [23][24][25][27][28][29] for nine incident energies from 14.2 to 75.0 MeV. It is evident that the experimental angular distributions are described well by the present model parameters.…”

“…Therefore, it was assumed that the interaction of nucleons with 28 Si proceeds via direct mechanism, which can be described by the optical model. The overall χ 2 was 6.3, which means that the exper- 24) E n = 20.0 25,26) E n = 21.6 28) E n = 30.3 29) E n = 55.0 17) E p = 51.9 34) E p = 65.0 • Olmer et al 35) E p = 80.0…”

“…The calculated differential cross sections of the neutron inelastic Fig. 6 Comparison of the calculated and experimental angular distributions [23][24][25][27][28][29] for neutron elastic scattering from 28 Si nucleus scattering leading to the 2 + (1.779 MeV) and 4 + (4.617 MeV) level excitations are shown in Fig. 7, compared with the experimental data 23,26,27) for two incident energies of 14.2 MeV and 21.7 MeV.…”

Calculation and evaluation of cross-sections for p+54,56,57,58,natFe reactions up to 250MeV

“…The optical model potential parameters for neutron are obtained from fitting experimental data of total crosssections [4][5][6], nonelastic scattering cross-sections [7] and elastic scattering angular distributions [8][9][10][11][12][13][14][15][16][17] for n+ 56 Fe reaction. The optical potential parameters for other charged particles are taken from [18].…”

Nuclear Level Structure, B(E2) Gamma-transitions and Nucleon Interaction Data for56Fe by a Unified Soft-rotator Model and Coupled-Channels Framework

“…The optical potential parameters were searched by mini- 32,33) E n =14.1 • Hata et al 27) E n =14.13 • • Tutubalin et al 28) E n =14.7 • Olsson et al 34) E n =21.1 • • Ibaraki et al 29,30) E n =55.0 40) E p =65.0 • Comparat et al 41) E p =156.0 •…”