Evaluation of delayed neutron yields and time spectra from photofission of 238 U induced by Bremsstrahlung photons below 9 MeV
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| Názov: | Evaluation of delayed neutron yields and time spectra from photofission of 238 U induced by Bremsstrahlung photons below 9 MeV |
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| Autori: | Sari, Adrien, Elayeb, Aly, de Stefano, Roberto, Meleshenkovskii, Iaroslav, Michel, Maugan, Carrel, Frédérick |
| Prispievatelia: | Laboratoire Capteurs et Architectures Electroniques (CEA, LIST) (LCAE (CEA, LIST)), Département Métrologie Instrumentation & Information (CEA, LIST) (DM2I (CEA, LIST)), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay |
| Zdroj: | 15th International Conference on Nuclear Data for Science and Technology (ND2022) https://cea.hal.science/cea-04169501 15th International Conference on Nuclear Data for Science and Technology (ND2022), Jul 2022, Sacramento, United States. pp.11002, ⟨10.1051/epjconf/202328411002⟩ |
| Informácie o vydavateľovi: | CCSD |
| Rok vydania: | 2022 |
| Predmety: | U-238, nuclear instrumentation, instrumentation, particle transport, simulation, Monte Carlo, reference source, SAPHIR, linac, actinides, photofission, neutrons, spectrum analysis, radioactivity, ionizing radiation, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis, Statistics and Probability [physics.data-an] |
| Geografické téma: | Sacramento, United States |
| Time: | Sacramento, United States |
| Popis: | International audience ; Few data exist regarding the yields and time spectra of delayed neutrons from the photofission reaction on actinides. In this paper, we report the characteristics of both six-group and eight-group delayed neutron time models for the photofission of U-238 induced by a Bremsstrahlung photon spectrum with an end-point energy at 9 MeV. This study was conducted using a 9 MeV linear electron accelerator housed at the SAPHIR platform located at CEA Paris-Saclay, France. A reference sample of depleted uranium was positioned inside a neutron detection block, previously designed and optimized by Monte Carlo simulation, made of high-density polyethylene covered by cadmium and including ten one meter-long He-3 proportional counters. Based on the consistent set of half-lives proposed by Spriggs et al. as early as 1999 for neutron induced fission, our description in eight delayed neutron groups for U-238 at 9 MeV is the first published for photofission. These new results bring valuable information to the scarce data available in the literature and represent useful inputs for the development of photofission-based nuclear measurement systems as they meet a significant interest in the fields of nuclear data, radioactive waste package characterization and for security-related applications. |
| Druh dokumentu: | conference object |
| Jazyk: | English |
| DOI: | 10.1051/epjconf/202328411002 |
| Dostupnosť: | https://cea.hal.science/cea-04169501 https://cea.hal.science/cea-04169501v1/document https://cea.hal.science/cea-04169501v1/file/epjconf_nd2023_11002.pdf https://doi.org/10.1051/epjconf/202328411002 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| Prístupové číslo: | edsbas.88609AFD |
| Databáza: | BASE |
Nájsť tento článok vo Web of Science | Abstrakt: | International audience ; Few data exist regarding the yields and time spectra of delayed neutrons from the photofission reaction on actinides. In this paper, we report the characteristics of both six-group and eight-group delayed neutron time models for the photofission of U-238 induced by a Bremsstrahlung photon spectrum with an end-point energy at 9 MeV. This study was conducted using a 9 MeV linear electron accelerator housed at the SAPHIR platform located at CEA Paris-Saclay, France. A reference sample of depleted uranium was positioned inside a neutron detection block, previously designed and optimized by Monte Carlo simulation, made of high-density polyethylene covered by cadmium and including ten one meter-long He-3 proportional counters. Based on the consistent set of half-lives proposed by Spriggs et al. as early as 1999 for neutron induced fission, our description in eight delayed neutron groups for U-238 at 9 MeV is the first published for photofission. These new results bring valuable information to the scarce data available in the literature and represent useful inputs for the development of photofission-based nuclear measurement systems as they meet a significant interest in the fields of nuclear data, radioactive waste package characterization and for security-related applications. |
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| DOI: | 10.1051/epjconf/202328411002 |