Open Access
ND 2007
Article Number 129
Number of page(s) 3
Section Measurements
Published online 17 June 2008
International Conference on Nuclear Data for Science and Technology 2007
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. Shuh5

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

Published online: 21 May 2008

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