Ab initio translationally invariant nucleon-nucleus optical potentials
Fuente:
arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| Soggetti: | |
| Accesso online: | |
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| _version_ | 1866917571175907328 |
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| author | Burrows, M. Launey, K. D. Mercenne, A. Baker, R. B. Sargsyan, G. H. Dytrych, T. Langr, D. |
| author_facet | Burrows, M. Launey, K. D. Mercenne, A. Baker, R. B. Sargsyan, G. H. Dytrych, T. Langr, D. |
| contents | We combine the \textit{ab initio} symmetry-adapted no-core shell model (SA-NCSM) with the single-particle Green's function approach to construct optical potentials rooted in first principles. Specifically, we show that total cross sections and phase shifts for neutron elastic scattering from a $^4$He target with projectile energies between 0.5 and 10 MeV closely reproduce the experiment. In addition, we discuss an important new development that resolves a long-standing issue with spurious center-of-mass motion in the Green's function formalism for many-body approaches. The new development opens the path for first-principle predictions of cross sections for elastic scattering of single-nucleon projectiles, nucleon capture and deuteron breakup reactions, feasible for a broad range of open-shell spherical and deformed nuclei in the SA-NCSM approach. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_00202 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Ab initio translationally invariant nucleon-nucleus optical potentials Burrows, M. Launey, K. D. Mercenne, A. Baker, R. B. Sargsyan, G. H. Dytrych, T. Langr, D. Nuclear Theory We combine the \textit{ab initio} symmetry-adapted no-core shell model (SA-NCSM) with the single-particle Green's function approach to construct optical potentials rooted in first principles. Specifically, we show that total cross sections and phase shifts for neutron elastic scattering from a $^4$He target with projectile energies between 0.5 and 10 MeV closely reproduce the experiment. In addition, we discuss an important new development that resolves a long-standing issue with spurious center-of-mass motion in the Green's function formalism for many-body approaches. The new development opens the path for first-principle predictions of cross sections for elastic scattering of single-nucleon projectiles, nucleon capture and deuteron breakup reactions, feasible for a broad range of open-shell spherical and deformed nuclei in the SA-NCSM approach. |
| title | Ab initio translationally invariant nucleon-nucleus optical potentials |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2307.00202 |