Orientation effects of deformed nuclei in intermediate-energy nuclear scattering
Abstract
We investigate the effects of nuclear deformation on intermediate-energy nuclear scattering within the Glauber theory. A formalism that explicitly incorporates the orientation dependence of deformed intrinsic states is derived, in which reaction observables are first computed with a fixed orientation and then the angle average of the reaction observables is taken afterwards. This formalism is applied to elastic scattering and total reaction cross sections. In addition, a new expansion scheme of the optical-limit approximation is proposed and shown to include contributions from a class of nuclear excitations, allowing a simple estimate of part of the total inelastic scattering cross section. The orientation dependence is generally weak for both proton- and carbon-target scattering and supports the validity of conventional treatments with an angle averaged density for light and medium-heavy nuclei. However, noticeable deviations emerge for strongly deformed heavy nuclei. The present analysis further demonstrates that the summed inelastic scattering cross section to rotationally excited states can be interpreted as a manifestation of fluctuations of the nuclear surface density associated with deformation. The present study provides a quantum-mechanical interpretation of deformation effects in intermediate-energy nuclear reactions and suggests a pathway toward a more reliable theoretical description of interaction cross section measurements. Brief comments on the role of nuclear deformation in low-energy heavy-ion reactions and ultra-relativistic heavy-ion collisions are also made.
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BibTeX
@misc{horiuchi2026orientation,
title = {{Orientation effects of deformed nuclei in intermediate-energy nuclear scattering}},
author = {W. Horiuchi and K. Hagino},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.38132},
eprint = {2610.38132},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.38132},
}
RIS
TY - UNPB
TI - Orientation effects of deformed nuclei in intermediate-energy nuclear scattering
AU - W. Horiuchi
AU - K. Hagino
PY - 2026
DA - 2026/10/28
PB - arXiv
DO - 10.48550/arxiv.2610.38132
UR - https://arxiv.org/abs/2610.38132
AB - We investigate the effects of nuclear deformation on intermediate-energy nuclear scattering within the Glauber theory. A formalism that explicitly incorporates the orientation dependence of deformed intrinsic states is derived, in which reaction observables are first computed with a fixed orientation and then the angle average of the reaction observables is taken afterwards. This formalism is applied to elastic scattering and total reaction cross sections. In addition, a new expansion scheme of the optical-limit approximation is proposed and shown to include contributions from a class of nuclear excitations, allowing a simple estimate of part of the total inelastic scattering cross section. The orientation dependence is generally weak for both proton- and carbon-target scattering and supports the validity of conventional treatments with an angle averaged density for light and medium-heavy nuclei. However, noticeable deviations emerge for strongly deformed heavy nuclei. The present analysis further demonstrates that the summed inelastic scattering cross section to rotationally excited states can be interpreted as a manifestation of fluctuations of the nuclear surface density associated with deformation. The present study provides a quantum-mechanical interpretation of deformation effects in intermediate-energy nuclear reactions and suggests a pathway toward a more reliable theoretical description of interaction cross section measurements. Brief comments on the role of nuclear deformation in low-energy heavy-ion reactions and ultra-relativistic heavy-ion collisions are also made.
ER -