Fast-neutron-induced fission cross section of Pu 242 measured at the neutron time-of-flight facility nELBE
(2019) In Physical Review C 99(2).- Abstract
The fast-neutron-induced fission cross section of Pu242 was measured at the neutron time-of-flight facility nELBE. A parallel-plate fission ionization chamber with novel, homogeneous, large-area Pu242 deposits on Si-wafer backings was used to determine this quantity relative to the IAEA neutron cross-section standard U235(n,f) in the energy range of 0.5 to 10 MeV. The number of target nuclei was determined from the measured spontaneous fission rate of Pu242. This helps to reduce the influence of the fission fragment detection efficiency on the cross section. Neutron transport simulations performed with geant4, mcnp6, and fluka2011 are used to correct the cross-section data for neutron scattering. In the reported energy range the... (More)
The fast-neutron-induced fission cross section of Pu242 was measured at the neutron time-of-flight facility nELBE. A parallel-plate fission ionization chamber with novel, homogeneous, large-area Pu242 deposits on Si-wafer backings was used to determine this quantity relative to the IAEA neutron cross-section standard U235(n,f) in the energy range of 0.5 to 10 MeV. The number of target nuclei was determined from the measured spontaneous fission rate of Pu242. This helps to reduce the influence of the fission fragment detection efficiency on the cross section. Neutron transport simulations performed with geant4, mcnp6, and fluka2011 are used to correct the cross-section data for neutron scattering. In the reported energy range the systematic uncertainty is below 2.7% and on average the statistical uncertainty is 4.9%. The determined results show an agreement within 0.67(16)% to recently published data and a good accordance to current evaluated data sets.
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- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review C
- volume
- 99
- issue
- 2
- article number
- 024604
- publisher
- American Physical Society
- external identifiers
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- scopus:85061279699
- ISSN
- 2469-9985
- DOI
- 10.1103/PhysRevC.99.024604
- language
- English
- LU publication?
- yes
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- 5bbd3f6b-5ddd-4ae0-975f-84dccbd39d50
- date added to LUP
- 2022-03-31 12:24:12
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- 2023-01-11 14:41:39
@article{5bbd3f6b-5ddd-4ae0-975f-84dccbd39d50, abstract = {{<p>The fast-neutron-induced fission cross section of Pu242 was measured at the neutron time-of-flight facility nELBE. A parallel-plate fission ionization chamber with novel, homogeneous, large-area Pu242 deposits on Si-wafer backings was used to determine this quantity relative to the IAEA neutron cross-section standard U235(n,f) in the energy range of 0.5 to 10 MeV. The number of target nuclei was determined from the measured spontaneous fission rate of Pu242. This helps to reduce the influence of the fission fragment detection efficiency on the cross section. Neutron transport simulations performed with geant4, mcnp6, and fluka2011 are used to correct the cross-section data for neutron scattering. In the reported energy range the systematic uncertainty is below 2.7% and on average the statistical uncertainty is 4.9%. The determined results show an agreement within 0.67(16)% to recently published data and a good accordance to current evaluated data sets.</p>}}, author = {{Kögler, T. and Junghans, A. R. and Beyer, R. and Dietz, M. and Düllmann, Ch E. and Eberhardt, K. and Lorenz, Ch and Müller, S. E. and Nolte, R. and Reinhardt, T. P. and Schmidt, K. and Runke, J. and Schwengner, R. and Takacs, M. and Vascon, A. and Wagner, A.}}, issn = {{2469-9985}}, language = {{eng}}, number = {{2}}, publisher = {{American Physical Society}}, series = {{Physical Review C}}, title = {{Fast-neutron-induced fission cross section of Pu 242 measured at the neutron time-of-flight facility nELBE}}, url = {{http://dx.doi.org/10.1103/PhysRevC.99.024604}}, doi = {{10.1103/PhysRevC.99.024604}}, volume = {{99}}, year = {{2019}}, }