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Fast-neutron-induced fission cross section of Pu 242 measured at the neutron time-of-flight facility nELBE

Kögler, T. ; Junghans, A. R. ; Beyer, R. ; Dietz, M. ; Düllmann, Ch E. ; Eberhardt, K. ; Lorenz, Ch LU orcid ; Müller, S. E. ; Nolte, R. and Reinhardt, T. P. , et al. (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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publishing date
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
  • scopus:85061279699
ISSN
2469-9985
DOI
10.1103/PhysRevC.99.024604
language
English
LU publication?
yes
id
5bbd3f6b-5ddd-4ae0-975f-84dccbd39d50
date added to LUP
2022-03-31 12:24:12
date last changed
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}},
}