Angular momentum of doubly magic 132Sn fission product: Experimental and theoretical aspects
Despite the numerous theoretical and experimental works published very recently, the way in which fission fragments acquire their angular momentum is still an open question. This angular momentum generation mechanism is important not only for improving our understanding of the fission process, but a...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2023-01-01
|
| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2023/10/epjconf_nd2023_04022.pdf |
| _version_ | 1797807655285161984 |
|---|---|
| author | Serot Olivier Chebboubi Abdelhazize Nicholson Jehaan Kessedjian Grégoire Litaize Olivier Sage Christophe Meplan Olivier Ramdhane Mourad Köster Ulli Kim Yung Hee |
| author_facet | Serot Olivier Chebboubi Abdelhazize Nicholson Jehaan Kessedjian Grégoire Litaize Olivier Sage Christophe Meplan Olivier Ramdhane Mourad Köster Ulli Kim Yung Hee |
| author_sort | Serot Olivier |
| collection | DOAJ |
| description | Despite the numerous theoretical and experimental works published very recently, the way in which fission fragments acquire their angular momentum is still an open question. This angular momentum generation mechanism is important not only for improving our understanding of the fission process, but also for nuclear energy applications, since the angular momentum of fission fragments strongly impact the prompt gamma spectra and consequently the decay heat in a reactor. In this context, within the framework of a collaboration between the ‘Laboratoire de Physique Subatomique et Corpusculaire’ (LPSC, France), the ‘Institut Laue Langevin’ (ILL, France) and the CEA-Cadarache (France), an experimental program was developed on the LO-HENGRIN mass-spectrometer with the aim of measuring isomeric ratio of some fission products for different thermal-neutron-induced fission reactions. This paper will be focused on the results obtained for the spherical nucleus 132Sn following thermal-neutron-induced fission of both 235U and 241Pu targets. To further challenge the angular momentum generation models, 132Sn isomeric ratio (IR) was measured as a function of 132Sn fission product kinetic energy (KE). The angular momentum was determined by combining our experimental data with the calculations performed with the FIFRELIN Monte Carlo code. A clear angular momentum decrease with KE was observed for both reactions. Lastly, we investigate the dependence of the 132Sn angular momentum with the incident neutron energy, from thermal region up to 5 MeV (below the second-chance fission). For that, the four free available parameters in FIFRELIN are selected in order to reproduce the average prompt neutron multiplicity. In this way, the angular momentum is deduced for each neutron energy. These results are discussed in terms of the impact of the available intrinsic excitation energy at scission on the spin generation mechanism. |
| first_indexed | 2024-03-13T06:25:53Z |
| format | Article |
| id | doaj.art-855eea31ddcd4d1eb45a7ec404cdf4bb |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-03-13T06:25:53Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-855eea31ddcd4d1eb45a7ec404cdf4bb2023-06-09T09:18:02ZengEDP SciencesEPJ Web of Conferences2100-014X2023-01-012840402210.1051/epjconf/202328404022epjconf_nd2023_04022Angular momentum of doubly magic 132Sn fission product: Experimental and theoretical aspectsSerot Olivier0Chebboubi Abdelhazize1Nicholson Jehaan2Kessedjian Grégoire3Litaize Olivier4Sage Christophe5Meplan Olivier6Ramdhane Mourad7Köster Ulli8Kim Yung Hee9CEA, DES, IRESNE, DER, SPRC, CadaracheCEA, DES, IRESNE, DER, SPRC, CadaracheCEA, DES, IRESNE, DER, SPRC, CadaracheCEA, DES, IRESNE, DER, SPRC, CadaracheCEA, DES, IRESNE, DER, SPRC, CadaracheLPSC, Université Grenoble Alpes, CNRS/IN2P3LPSC, Université Grenoble Alpes, CNRS/IN2P3LPSC, Université Grenoble Alpes, CNRS/IN2P3Institut Laue LangevinInstitut Laue LangevinDespite the numerous theoretical and experimental works published very recently, the way in which fission fragments acquire their angular momentum is still an open question. This angular momentum generation mechanism is important not only for improving our understanding of the fission process, but also for nuclear energy applications, since the angular momentum of fission fragments strongly impact the prompt gamma spectra and consequently the decay heat in a reactor. In this context, within the framework of a collaboration between the ‘Laboratoire de Physique Subatomique et Corpusculaire’ (LPSC, France), the ‘Institut Laue Langevin’ (ILL, France) and the CEA-Cadarache (France), an experimental program was developed on the LO-HENGRIN mass-spectrometer with the aim of measuring isomeric ratio of some fission products for different thermal-neutron-induced fission reactions. This paper will be focused on the results obtained for the spherical nucleus 132Sn following thermal-neutron-induced fission of both 235U and 241Pu targets. To further challenge the angular momentum generation models, 132Sn isomeric ratio (IR) was measured as a function of 132Sn fission product kinetic energy (KE). The angular momentum was determined by combining our experimental data with the calculations performed with the FIFRELIN Monte Carlo code. A clear angular momentum decrease with KE was observed for both reactions. Lastly, we investigate the dependence of the 132Sn angular momentum with the incident neutron energy, from thermal region up to 5 MeV (below the second-chance fission). For that, the four free available parameters in FIFRELIN are selected in order to reproduce the average prompt neutron multiplicity. In this way, the angular momentum is deduced for each neutron energy. These results are discussed in terms of the impact of the available intrinsic excitation energy at scission on the spin generation mechanism.https://www.epj-conferences.org/articles/epjconf/pdf/2023/10/epjconf_nd2023_04022.pdf |
| spellingShingle | Serot Olivier Chebboubi Abdelhazize Nicholson Jehaan Kessedjian Grégoire Litaize Olivier Sage Christophe Meplan Olivier Ramdhane Mourad Köster Ulli Kim Yung Hee Angular momentum of doubly magic 132Sn fission product: Experimental and theoretical aspects EPJ Web of Conferences |
| title | Angular momentum of doubly magic 132Sn fission product: Experimental and theoretical aspects |
| title_full | Angular momentum of doubly magic 132Sn fission product: Experimental and theoretical aspects |
| title_fullStr | Angular momentum of doubly magic 132Sn fission product: Experimental and theoretical aspects |
| title_full_unstemmed | Angular momentum of doubly magic 132Sn fission product: Experimental and theoretical aspects |
| title_short | Angular momentum of doubly magic 132Sn fission product: Experimental and theoretical aspects |
| title_sort | angular momentum of doubly magic 132sn fission product experimental and theoretical aspects |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2023/10/epjconf_nd2023_04022.pdf |
| work_keys_str_mv | AT serotolivier angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects AT chebboubiabdelhazize angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects AT nicholsonjehaan angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects AT kessedjiangregoire angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects AT litaizeolivier angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects AT sagechristophe angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects AT meplanolivier angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects AT ramdhanemourad angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects AT kosterulli angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects AT kimyunghee angularmomentumofdoublymagic132snfissionproductexperimentalandtheoreticalaspects |