Remeasurement of the $^{239}$Pu(n,f)/$^{235}$U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber Using Vapor-deposited Targets
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| Autores principales: | , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2024
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| author | Dongwi, D. H. Snyder, L. Aguilar, V. Androski, N. Anastasiou, M. Bowden, N. S. Chemey, A. Classen, T. Alencar, J. E. Fuzaro Greife, U. Haseman, M. Isenhower, L. D. Klay, J. L. Loveland, W. Mendenhall, M. P. Monterial, M. Silveira, M. Prokop, C. Watson, T. S. Yao, L. |
| author_facet | Dongwi, D. H. Snyder, L. Aguilar, V. Androski, N. Anastasiou, M. Bowden, N. S. Chemey, A. Classen, T. Alencar, J. E. Fuzaro Greife, U. Haseman, M. Isenhower, L. D. Klay, J. L. Loveland, W. Mendenhall, M. P. Monterial, M. Silveira, M. Prokop, C. Watson, T. S. Yao, L. |
| contents | The NIFFTE fission Time Projection Chamber (fissionTPC) has been used to measure the $^{239}$Pu(n,f)/$^{235}$U(n,f) cross-section ratio for neutron-induced fission in the range of 0.1 - 100 MeV, with high precision. A white neutron source was provided by the Los Alamos Neutron Science Center, where the experiment was conducted as a remeasurement to evaluate a roughly 2% discrepancy of the previous fissionTPC results with ENDF/B-VIII.0. A detailed accounting of measurement uncertainties was performed, based on the fissionTPC's novel ability to provide three-dimensional reconstruction of fission-fragment ionization profiles. Current results obtained using a vapor-deposited, highly uniform $^{239}$Pu target, in comparison to the measurement published in 2021, where a $^{239}$Pu electroplated target was used, are presented and discussed. The remeasurement presented here is in agreement with the previous fissionTPC result within measurement uncertainties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_18279 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Remeasurement of the $^{239}$Pu(n,f)/$^{235}$U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber Using Vapor-deposited Targets Dongwi, D. H. Snyder, L. Aguilar, V. Androski, N. Anastasiou, M. Bowden, N. S. Chemey, A. Classen, T. Alencar, J. E. Fuzaro Greife, U. Haseman, M. Isenhower, L. D. Klay, J. L. Loveland, W. Mendenhall, M. P. Monterial, M. Silveira, M. Prokop, C. Watson, T. S. Yao, L. Nuclear Experiment The NIFFTE fission Time Projection Chamber (fissionTPC) has been used to measure the $^{239}$Pu(n,f)/$^{235}$U(n,f) cross-section ratio for neutron-induced fission in the range of 0.1 - 100 MeV, with high precision. A white neutron source was provided by the Los Alamos Neutron Science Center, where the experiment was conducted as a remeasurement to evaluate a roughly 2% discrepancy of the previous fissionTPC results with ENDF/B-VIII.0. A detailed accounting of measurement uncertainties was performed, based on the fissionTPC's novel ability to provide three-dimensional reconstruction of fission-fragment ionization profiles. Current results obtained using a vapor-deposited, highly uniform $^{239}$Pu target, in comparison to the measurement published in 2021, where a $^{239}$Pu electroplated target was used, are presented and discussed. The remeasurement presented here is in agreement with the previous fissionTPC result within measurement uncertainties. |
| title | Remeasurement of the $^{239}$Pu(n,f)/$^{235}$U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber Using Vapor-deposited Targets |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2409.18279 |