Evaluation of delayed neutron yields and time spectra from photofission of 238 U induced by Bremsstrahlung photons below 9 MeV

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Titel: Evaluation of delayed neutron yields and time spectra from photofission of 238 U induced by Bremsstrahlung photons below 9 MeV
Autoren: Sari, Adrien, Elayeb, Aly, de Stefano, Roberto, Meleshenkovskii, Iaroslav, Michel, Maugan, Carrel, Frédérick
Weitere Verfasser: 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
Quelle: 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⟩
Verlagsinformationen: CCSD
Publikationsjahr: 2022
Schlagwörter: 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]
Geographisches Schlagwort: Sacramento, United States
Time: Sacramento, United States
Beschreibung: 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.
Publikationsart: conference object
Sprache: English
DOI: 10.1051/epjconf/202328411002
Verfügbarkeit: 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
Dokumentencode: edsbas.88609AFD
Datenbank: BASE
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  Data: Evaluation of delayed neutron yields and time spectra from photofission of 238 U induced by Bremsstrahlung photons below 9 MeV
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  Data: Laboratoire Capteurs et Architectures Electroniques (CEA, LIST) (LCAE (CEA, LIST))<br />Département Métrologie Instrumentation & Information (CEA, LIST) (DM2I (CEA, LIST))<br />Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA))<br />Direction de Recherche Technologique (CEA) (DRT (CEA))<br />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))<br />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))<br />Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
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  Data: 15th International Conference on Nuclear Data for Science and Technology (ND2022)<br />https://cea.hal.science/cea-04169501<br />15th International Conference on Nuclear Data for Science and Technology (ND2022), Jul 2022, Sacramento, United States. pp.11002, ⟨10.1051/epjconf/202328411002⟩
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  Data: 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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