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Measurement of the 6Li(n, α) neutron standard cross-section at the GELINA facility

Jansson, Kaj LU ; Al-Adili, Ali; Bevilacqua, Riccardo LU ; Gustavsson, Cecilia; Hambsch, Franz Josef; Pomp, Stephan and Vidali, Marzio (2016) In EPJ Web of Conferences 122.
Abstract

The 6Li(n,α) reaction cross-section is commonly used as a reference cross section. However, it is only considered a neutron standard up to 1MeV. For higher energies, there are discrepancies of several per cents between recent measurements and evaluated data files. In order to extend and establish 6Li(n,α) as a neutron standard above 1MeV these discrepancies must be resolved. Our measurement at the GELINA facility at JRC-IRMM in Geel, Belgium is ongoing. We are using a double twin Frisch-grid setup to detect both α-particles from two 6Li targets and fission products from two 235U reference targets. Our targets have thick backings but are employed in pairs, one forward facing and one backward... (More)

The 6Li(n,α) reaction cross-section is commonly used as a reference cross section. However, it is only considered a neutron standard up to 1MeV. For higher energies, there are discrepancies of several per cents between recent measurements and evaluated data files. In order to extend and establish 6Li(n,α) as a neutron standard above 1MeV these discrepancies must be resolved. Our measurement at the GELINA facility at JRC-IRMM in Geel, Belgium is ongoing. We are using a double twin Frisch-grid setup to detect both α-particles from two 6Li targets and fission products from two 235U reference targets. Our targets have thick backings but are employed in pairs, one forward facing and one backward facing. In this way we still cover, in principle, a solid angle of 4π. We present some preliminary results showing that the existing cross-section data is well reproduced around the resonance at 240 keV. The final data taking will start in the beginning of 2016, when the GELINA facility goes online again after a few months of shut down.

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organization
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publication status
published
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in
EPJ Web of Conferences
volume
122
publisher
EDP Sciences
external identifiers
  • scopus:84978047757
ISSN
2100-014X
DOI
10.1051/epjconf/201612208006
language
English
LU publication?
yes
id
1b477533-9c7a-4edd-b915-3de0377bb782
date added to LUP
2017-01-20 13:40:34
date last changed
2017-10-22 05:25:14
@article{1b477533-9c7a-4edd-b915-3de0377bb782,
  abstract     = {<p>The <sup>6</sup>Li(n,α) reaction cross-section is commonly used as a reference cross section. However, it is only considered a neutron standard up to 1MeV. For higher energies, there are discrepancies of several per cents between recent measurements and evaluated data files. In order to extend and establish <sup>6</sup>Li(n,α) as a neutron standard above 1MeV these discrepancies must be resolved. Our measurement at the GELINA facility at JRC-IRMM in Geel, Belgium is ongoing. We are using a double twin Frisch-grid setup to detect both α-particles from two <sup>6</sup>Li targets and fission products from two <sup>235</sup>U reference targets. Our targets have thick backings but are employed in pairs, one forward facing and one backward facing. In this way we still cover, in principle, a solid angle of 4π. We present some preliminary results showing that the existing cross-section data is well reproduced around the resonance at 240 keV. The final data taking will start in the beginning of 2016, when the GELINA facility goes online again after a few months of shut down.</p>},
  articleno    = {08006},
  author       = {Jansson, Kaj and Al-Adili, Ali and Bevilacqua, Riccardo and Gustavsson, Cecilia and Hambsch, Franz Josef and Pomp, Stephan and Vidali, Marzio},
  issn         = {2100-014X},
  language     = {eng},
  month        = {06},
  publisher    = {EDP Sciences},
  series       = {EPJ Web of Conferences},
  title        = {Measurement of the <sup>6</sup>Li(n, α) neutron standard cross-section at the GELINA facility},
  url          = {http://dx.doi.org/10.1051/epjconf/201612208006},
  volume       = {122},
  year         = {2016},
}