Open Access
Issue |
ND 2007
2007
|
|
---|---|---|
Article Number | 129 | |
Number of page(s) | 3 | |
Section | Measurements | |
DOI | https://doi.org/10.1051/ndata:07473 | |
Published online | 17 June 2008 |
International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07473
1 CENBG, Université de Bordeaux 1, 33175 Gradignan Cedex, France
2 IPN Orsay, Université Paris-Sud, 91406 Orsay, France
3 EC-JRC-IRMM, 2440 Geel, Belgium
4 Laboratory of Inorganic and Nuclear Chemistry, NY 12201, USA
5 LBNL, CA 94720, USA
aiche@cenbg.in2p3.fr
Published online: 21 May 2008
© CEA 2008
DOI: 10.1051/ndata:07473
Quasi-absolute neutron-induced fission cross section of 243Am
M. Aíche1, G. Kessedjian1, G. Barreau1, B. Jurado1, A. Bidaud1, S. Czajkowski1, D. Dassié1, B. Haas1, L. Mathieu1, L. Tassan-Got2, J. Wilson2, F.-J. Hambsch3, S. Oberstedt3, I. AlMahamid4, J. Floyd5, W. Lukens5 and D. Shuh51 CENBG, Université de Bordeaux 1, 33175 Gradignan Cedex, France
2 IPN Orsay, Université Paris-Sud, 91406 Orsay, France
3 EC-JRC-IRMM, 2440 Geel, Belgium
4 Laboratory of Inorganic and Nuclear Chemistry, NY 12201, USA
5 LBNL, CA 94720, USA
aiche@cenbg.in2p3.fr
Published online: 21 May 2008
Abstract
The existing evaluations of the 243Am neutron-induced fission cross section have been questioned by recent studies performed at the GNEISS facility. In the neutron energy range from 1 to 6 MeV the GNEISS data present deviations of more than 15% with respect to the evaluations. In order to solve this problem, we have performed a first quasi-absolute measurement of this fission cross section from the fission threshold up to the onset of second-chance fission. To achieve this goal we have used the neutron-proton scattering cross section as reference reaction to determine the incident neutron flux. This cross section is known with a precision better than 1% for a wide range of neutron energies (1 meV to 20 MeV).
© CEA 2008