Photoneutron reaction cross sections for 75As and 181Ta: Sytematic uncertainties and data reliability
There is well-known problem of significant systematic disagreements between data for reactions (γ, 1n), (γ, 2n), obtained at Livermore (USA) and Saclay (France) using the method of photoneutron multiplicity sorting. The averaged ratios RS/Lint of integrated cross sections obtained at Saclay and Live...
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2020-01-01
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doaj-d7ea2f5b04814329919bae9a86424d762021-08-02T16:10:41ZengEDP SciencesEPJ Web of Conferences2100-014X2020-01-012390103510.1051/epjconf/202023901035epjconf_nd2019_01035Photoneutron reaction cross sections for 75As and 181Ta: Sytematic uncertainties and data reliabilityVarlamov Vladimir0Davydov Alexander1Ishkhanov BorisKaidarova Valeriya2Orlin Vadim3Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear PhysicsLomonosov Moscow State University, Physics DepartmentLomonosov Moscow State University, Physics DepartmentLomonosov Moscow State University, Skobeltsyn Institute of Nuclear PhysicsThere is well-known problem of significant systematic disagreements between data for reactions (γ, 1n), (γ, 2n), obtained at Livermore (USA) and Saclay (France) using the method of photoneutron multiplicity sorting. The averaged ratios RS/Lint of integrated cross sections obtained at Saclay and Livermore for 19 nuclei from 51V to 239U are equal to 0.84 for (γ, 2n) and 1.07 for (γ, 1n) reactions. For 75As RS/Lint ratios for both partial reactions are very close (1.22 and 1.21) but for 181Ta - are quite different (0.89 and 1.25). Using the objective physical data reliability criteria it was found that there are serious doubts in reliability of Saclay and Livermore data. The newly evaluated reliable cross sections disagree with experimental data. In addition to unreliable sorting of many neutrons between both partial reactions many neutrons were lost - on the case of 181Ta in 1n channel, in the case of 75As in both 1n and 2n channels.https://www.epj-conferences.org/articles/epjconf/pdf/2020/15/epjconf_nd2019_01035.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Varlamov Vladimir Davydov Alexander Ishkhanov Boris Kaidarova Valeriya Orlin Vadim |
spellingShingle |
Varlamov Vladimir Davydov Alexander Ishkhanov Boris Kaidarova Valeriya Orlin Vadim Photoneutron reaction cross sections for 75As and 181Ta: Sytematic uncertainties and data reliability EPJ Web of Conferences |
author_facet |
Varlamov Vladimir Davydov Alexander Ishkhanov Boris Kaidarova Valeriya Orlin Vadim |
author_sort |
Varlamov Vladimir |
title |
Photoneutron reaction cross sections for 75As and 181Ta: Sytematic uncertainties and data reliability |
title_short |
Photoneutron reaction cross sections for 75As and 181Ta: Sytematic uncertainties and data reliability |
title_full |
Photoneutron reaction cross sections for 75As and 181Ta: Sytematic uncertainties and data reliability |
title_fullStr |
Photoneutron reaction cross sections for 75As and 181Ta: Sytematic uncertainties and data reliability |
title_full_unstemmed |
Photoneutron reaction cross sections for 75As and 181Ta: Sytematic uncertainties and data reliability |
title_sort |
photoneutron reaction cross sections for 75as and 181ta: sytematic uncertainties and data reliability |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2020-01-01 |
description |
There is well-known problem of significant systematic disagreements between data for reactions (γ, 1n), (γ, 2n), obtained at Livermore (USA) and Saclay (France) using the method of photoneutron multiplicity sorting. The averaged ratios RS/Lint of integrated cross sections obtained at Saclay and Livermore for 19 nuclei from 51V to 239U are equal to 0.84 for (γ, 2n) and 1.07 for (γ, 1n) reactions. For 75As RS/Lint ratios for both partial reactions are very close (1.22 and 1.21) but for 181Ta - are quite different (0.89 and 1.25). Using the objective physical data reliability criteria it was found that there are serious doubts in reliability of Saclay and Livermore data. The newly evaluated reliable cross sections disagree with experimental data. In addition to unreliable sorting of many neutrons between both partial reactions many neutrons were lost - on the case of 181Ta in 1n channel, in the case of 75As in both 1n and 2n channels. |
url |
https://www.epj-conferences.org/articles/epjconf/pdf/2020/15/epjconf_nd2019_01035.pdf |
work_keys_str_mv |
AT varlamovvladimir photoneutronreactioncrosssectionsfor75asand181tasytematicuncertaintiesanddatareliability AT davydovalexander photoneutronreactioncrosssectionsfor75asand181tasytematicuncertaintiesanddatareliability AT ishkhanovboris photoneutronreactioncrosssectionsfor75asand181tasytematicuncertaintiesanddatareliability AT kaidarovavaleriya photoneutronreactioncrosssectionsfor75asand181tasytematicuncertaintiesanddatareliability AT orlinvadim photoneutronreactioncrosssectionsfor75asand181tasytematicuncertaintiesanddatareliability |
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