Neutron elastic scattering on T = 0 nuclei

Neutron scattering from28Si and32S from 8.0 to 18.9 MeV, dispersive optical model analyses, and ground-state correlations

“…The present study explores the predictive power of the DOM in the continuum and bound-state regions, for the open-shell nuclei 28 Si and 32 S. Of course, we do not expect perfect agreement between the DOM predictions and data. Both nuclei are deformed in their ground states (displaying oblate and prolate shapes, respectively, in the intrinsic reference frame) and feature rotational states in their excitation spectra.…”

“…Some of the most challanging nuclei to model have been those, such as 28 Si and 32 S, with relatively low atomic number and non-spherical properties. The Triangle Universities Nuclear Laboratory (TUNL) has made a dedicated study of neutron scattering from light nuclei, in order to determine the limits of the OM approach.…”

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.…”