Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmas
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1093/ptep/ptaa093 http://hdl.handle.net/11449/206762 |
Resumo: | The triple-alpha reaction is key to 12C production and is expected to occur in weakly coupled thermal plasmas as encountered in normal stars.We investigate how Coulomb screening affects the structure of a system of three alpha particles in such a plasma environment by precise threebody calculations within the Debye-Hückel approximation. A three-alpha model that has the Coulomb interaction modified in theYukawa form is employed. Precise three-body wave functions are obtained by a superposition of correlated Gaussian basis with the aid of the stochastic variational method. The energy shifts of the Hoyle state due to the Coulomb screening are obtained as a function of the Debye screening length. The results, which automatically incorporate the finite-size effect of the Hoyle state, are consistent with the conventional result based on the Coulomb correction to the chemical potentials of ions that are regarded as point charges in a weakly coupled thermal plasma. We have given a theoretical basis to the conventional pointcharge approach to the Coulomb screening problem relevant for nuclear reactions in normal stars by providing the first evaluation of the Coulomb corrections to the Q value of the triple-alpha process that produces a finite-size Hoyle state. |
id |
UNSP_e1c599042e601214795fbe0d63c266fe |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/206762 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmasThe triple-alpha reaction is key to 12C production and is expected to occur in weakly coupled thermal plasmas as encountered in normal stars.We investigate how Coulomb screening affects the structure of a system of three alpha particles in such a plasma environment by precise threebody calculations within the Debye-Hückel approximation. A three-alpha model that has the Coulomb interaction modified in theYukawa form is employed. Precise three-body wave functions are obtained by a superposition of correlated Gaussian basis with the aid of the stochastic variational method. The energy shifts of the Hoyle state due to the Coulomb screening are obtained as a function of the Debye screening length. The results, which automatically incorporate the finite-size effect of the Hoyle state, are consistent with the conventional result based on the Coulomb correction to the chemical potentials of ions that are regarded as point charges in a weakly coupled thermal plasma. We have given a theoretical basis to the conventional pointcharge approach to the Coulomb screening problem relevant for nuclear reactions in normal stars by providing the first evaluation of the Coulomb corrections to the Q value of the triple-alpha process that produces a finite-size Hoyle state.Department of Physics Hokkaido UniversityDepartment of Mathematics and Physics Kochi UniversityInstituto de Física Teórica Universidade Estadual Paulista UNESP, Rua Dr. Bento Teobaldo Ferraz, 271 -Bloco IIInstituto de Física Teórica Universidade Estadual Paulista UNESP, Rua Dr. Bento Teobaldo Ferraz, 271 -Bloco IIHokkaido UniversityKochi UniversityUniversidade Estadual Paulista (Unesp)Phyu, Lai HninMoriya, H.Horiuchi, W.Iida, K.Noda, K.Yamashita, M. T. [UNESP]2021-06-25T10:37:42Z2021-06-25T10:37:42Z2020-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1093/ptep/ptaa093Progress of Theoretical and Experimental Physics, v. 2020, n. 9, 2020.2050-3911http://hdl.handle.net/11449/20676210.1093/ptep/ptaa0932-s2.0-85094662205Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProgress of Theoretical and Experimental Physicsinfo:eu-repo/semantics/openAccess2021-10-23T14:48:16Zoai:repositorio.unesp.br:11449/206762Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:44:17.982979Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmas |
title |
Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmas |
spellingShingle |
Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmas Phyu, Lai Hnin |
title_short |
Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmas |
title_full |
Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmas |
title_fullStr |
Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmas |
title_full_unstemmed |
Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmas |
title_sort |
Coulomb screening correction to the Q value of the triple-alpha process in thermal plasmas |
author |
Phyu, Lai Hnin |
author_facet |
Phyu, Lai Hnin Moriya, H. Horiuchi, W. Iida, K. Noda, K. Yamashita, M. T. [UNESP] |
author_role |
author |
author2 |
Moriya, H. Horiuchi, W. Iida, K. Noda, K. Yamashita, M. T. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Hokkaido University Kochi University Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Phyu, Lai Hnin Moriya, H. Horiuchi, W. Iida, K. Noda, K. Yamashita, M. T. [UNESP] |
description |
The triple-alpha reaction is key to 12C production and is expected to occur in weakly coupled thermal plasmas as encountered in normal stars.We investigate how Coulomb screening affects the structure of a system of three alpha particles in such a plasma environment by precise threebody calculations within the Debye-Hückel approximation. A three-alpha model that has the Coulomb interaction modified in theYukawa form is employed. Precise three-body wave functions are obtained by a superposition of correlated Gaussian basis with the aid of the stochastic variational method. The energy shifts of the Hoyle state due to the Coulomb screening are obtained as a function of the Debye screening length. The results, which automatically incorporate the finite-size effect of the Hoyle state, are consistent with the conventional result based on the Coulomb correction to the chemical potentials of ions that are regarded as point charges in a weakly coupled thermal plasma. We have given a theoretical basis to the conventional pointcharge approach to the Coulomb screening problem relevant for nuclear reactions in normal stars by providing the first evaluation of the Coulomb corrections to the Q value of the triple-alpha process that produces a finite-size Hoyle state. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-09-01 2021-06-25T10:37:42Z 2021-06-25T10:37:42Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1093/ptep/ptaa093 Progress of Theoretical and Experimental Physics, v. 2020, n. 9, 2020. 2050-3911 http://hdl.handle.net/11449/206762 10.1093/ptep/ptaa093 2-s2.0-85094662205 |
url |
http://dx.doi.org/10.1093/ptep/ptaa093 http://hdl.handle.net/11449/206762 |
identifier_str_mv |
Progress of Theoretical and Experimental Physics, v. 2020, n. 9, 2020. 2050-3911 10.1093/ptep/ptaa093 2-s2.0-85094662205 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Progress of Theoretical and Experimental Physics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128410645430272 |