Analyzing the neutron scattering angular distribution in a ACE-formatted multigroup cross section library using the maximum entropy method
To describe the angular distribution for a group-to-group neutron scattering event, the coefficients of a truncated Legendre polynomial are usually used in the multigroup cross section. However, the truncated expansion can caused negative values of a probability density function (PDF) in some scatte...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2020/15/epjconf_nd2019_10003.pdf |
| _version_ | 1818348382103535616 |
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| author | ZHU Shuai-tao MA Xu-bo TANG Hui YANG Le CAO Bo |
| author_facet | ZHU Shuai-tao MA Xu-bo TANG Hui YANG Le CAO Bo |
| author_sort | ZHU Shuai-tao |
| collection | DOAJ |
| description | To describe the angular distribution for a group-to-group neutron scattering event, the coefficients of a truncated Legendre polynomial are usually used in the multigroup cross section. However, the truncated expansion can caused negative values of a probability density function (PDF) in some scattering angles. In this study, the PDF of scattering angles is calculated using the maximum entropy method to avoid the negative probabilities of some scattering angles and the multigroup cross section library in ACE format is generated. The multigroup cross section library is verified by the computation of RBEC-M benchmark using RMC. The differences between two methods generating scattering data, the maximum entropy method and discrete angle method, are also discussed. The calculation results using multigroup cross section library in ACE format are well good agreement with the results of benchmark report. It shows that multigroup cross section library including the scattering angle data computed by the maximum entropy method is corrected and can be used for Monte Carlo calculation. |
| first_indexed | 2024-12-13T17:49:10Z |
| format | Article |
| id | doaj.art-9c6af1235b454b7d82b4564733282bdd |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-13T17:49:10Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-9c6af1235b454b7d82b4564733282bdd2022-12-21T23:36:33ZengEDP SciencesEPJ Web of Conferences2100-014X2020-01-012391000310.1051/epjconf/202023910003epjconf_nd2019_10003Analyzing the neutron scattering angular distribution in a ACE-formatted multigroup cross section library using the maximum entropy methodZHU Shuai-taoMA Xu-boTANG HuiYANG LeCAO BoTo describe the angular distribution for a group-to-group neutron scattering event, the coefficients of a truncated Legendre polynomial are usually used in the multigroup cross section. However, the truncated expansion can caused negative values of a probability density function (PDF) in some scattering angles. In this study, the PDF of scattering angles is calculated using the maximum entropy method to avoid the negative probabilities of some scattering angles and the multigroup cross section library in ACE format is generated. The multigroup cross section library is verified by the computation of RBEC-M benchmark using RMC. The differences between two methods generating scattering data, the maximum entropy method and discrete angle method, are also discussed. The calculation results using multigroup cross section library in ACE format are well good agreement with the results of benchmark report. It shows that multigroup cross section library including the scattering angle data computed by the maximum entropy method is corrected and can be used for Monte Carlo calculation.https://www.epj-conferences.org/articles/epjconf/pdf/2020/15/epjconf_nd2019_10003.pdf |
| spellingShingle | ZHU Shuai-tao MA Xu-bo TANG Hui YANG Le CAO Bo Analyzing the neutron scattering angular distribution in a ACE-formatted multigroup cross section library using the maximum entropy method EPJ Web of Conferences |
| title | Analyzing the neutron scattering angular distribution in a ACE-formatted multigroup cross section library using the maximum entropy method |
| title_full | Analyzing the neutron scattering angular distribution in a ACE-formatted multigroup cross section library using the maximum entropy method |
| title_fullStr | Analyzing the neutron scattering angular distribution in a ACE-formatted multigroup cross section library using the maximum entropy method |
| title_full_unstemmed | Analyzing the neutron scattering angular distribution in a ACE-formatted multigroup cross section library using the maximum entropy method |
| title_short | Analyzing the neutron scattering angular distribution in a ACE-formatted multigroup cross section library using the maximum entropy method |
| title_sort | analyzing the neutron scattering angular distribution in a ace formatted multigroup cross section library using the maximum entropy method |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2020/15/epjconf_nd2019_10003.pdf |
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