Isospin dependence in single-nucleon removal cross sections explained through valence-core destruction effects
The discrepancy between experimental data and theoretical calculations in one-nucleon removal reactions at intermediate energies (quantified by the so-called “quenching factors”) and its dependence on the isospin asymmetry of the nuclei has been an open problem in nuclear physics for the last fiftee...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269323006184 |
| _version_ | 1797454386247499776 |
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| author | M. Gómez-Ramos J. Gómez-Camacho A.M. Moro |
| author_facet | M. Gómez-Ramos J. Gómez-Camacho A.M. Moro |
| author_sort | M. Gómez-Ramos |
| collection | DOAJ |
| description | The discrepancy between experimental data and theoretical calculations in one-nucleon removal reactions at intermediate energies (quantified by the so-called “quenching factors”) and its dependence on the isospin asymmetry of the nuclei has been an open problem in nuclear physics for the last fifteen years. In this work, we propose an explanation for this long-standing problem, which relies on the inclusion of the process of core destruction due to its interaction with the removed nucleon. To include this effect, we extend the commonly used eikonal formalism via an effective nucleon density, and apply it to a series of nucleon knockout reactions. The effect of core destruction is found to depend strongly on the binding energy of the removed nucleon, leading to a significant reduction of the cross section for deeply bound nucleons, which reduces the isospin dependence of the “quenching factors”, making them more consistent with the trends found in transfer and (p,pN) reactions. |
| first_indexed | 2024-03-09T15:36:28Z |
| format | Article |
| id | doaj.art-dbb6e72e380c45ac9626d517a9e19dbf |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-03-09T15:36:28Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-dbb6e72e380c45ac9626d517a9e19dbf2023-11-26T05:11:25ZengElsevierPhysics Letters B0370-26932023-12-01847138284Isospin dependence in single-nucleon removal cross sections explained through valence-core destruction effectsM. Gómez-Ramos0J. Gómez-Camacho1A.M. Moro2Departamento de Física Atómica, Molecular y Nuclear, Facultad de Física, Universidad de Sevilla, Apartado 1065, E-41080 Sevilla, Spain; Corresponding author.Departamento de Física Atómica, Molecular y Nuclear, Facultad de Física, Universidad de Sevilla, Apartado 1065, E-41080 Sevilla, Spain; Centro Nacional de Aceleradores (U. Sevilla, J. Andalucía, CSIC), Tomás Alva Edison, 7, 41092 Sevilla, SpainDepartamento de Física Atómica, Molecular y Nuclear, Facultad de Física, Universidad de Sevilla, Apartado 1065, E-41080 Sevilla, Spain; Instituto Interuniversitario Carlos I de Física Teórica y Computacional (iC1), Apdo. 1065, E-41080 Sevilla, SpainThe discrepancy between experimental data and theoretical calculations in one-nucleon removal reactions at intermediate energies (quantified by the so-called “quenching factors”) and its dependence on the isospin asymmetry of the nuclei has been an open problem in nuclear physics for the last fifteen years. In this work, we propose an explanation for this long-standing problem, which relies on the inclusion of the process of core destruction due to its interaction with the removed nucleon. To include this effect, we extend the commonly used eikonal formalism via an effective nucleon density, and apply it to a series of nucleon knockout reactions. The effect of core destruction is found to depend strongly on the binding energy of the removed nucleon, leading to a significant reduction of the cross section for deeply bound nucleons, which reduces the isospin dependence of the “quenching factors”, making them more consistent with the trends found in transfer and (p,pN) reactions.http://www.sciencedirect.com/science/article/pii/S0370269323006184Optical modelDirect reactionsThree-body modelSpectroscopic factors |
| spellingShingle | M. Gómez-Ramos J. Gómez-Camacho A.M. Moro Isospin dependence in single-nucleon removal cross sections explained through valence-core destruction effects Physics Letters B Optical model Direct reactions Three-body model Spectroscopic factors |
| title | Isospin dependence in single-nucleon removal cross sections explained through valence-core destruction effects |
| title_full | Isospin dependence in single-nucleon removal cross sections explained through valence-core destruction effects |
| title_fullStr | Isospin dependence in single-nucleon removal cross sections explained through valence-core destruction effects |
| title_full_unstemmed | Isospin dependence in single-nucleon removal cross sections explained through valence-core destruction effects |
| title_short | Isospin dependence in single-nucleon removal cross sections explained through valence-core destruction effects |
| title_sort | isospin dependence in single nucleon removal cross sections explained through valence core destruction effects |
| topic | Optical model Direct reactions Three-body model Spectroscopic factors |
| url | http://www.sciencedirect.com/science/article/pii/S0370269323006184 |
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