Methodological Tests of Prompt Gamma-Ray Spectroscopy for (n, Xn) Cross Section Measurements at Various Facilities

Details Methodological Tests of Prompt Gamma-Ray Spectroscopy for (n, Xn) Cross Section Measurements at Various Facilities Methodological Tests of Prompt Gamma-Ray Spectroscopy for (n, Xn) Cross Section Measurements at Various Facilities

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cgrs.conf..694j&link_type=abstract

CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS. Proceedings of the Eleventh International Symposium. Held 2-6 September 2002

Mathematics

Logic

Scientific paper

In Accelerator Driven Systems the external neutron flux provided by the accelerator is produced by spallation reactions, which means that its spectrum extends to several hundreds of MeV. Thus (n, xn) reactions have more importance than in conventional reactors since they have a threshold increasing with x. On the other hand, the cross sections of these reactions are badly known. This is due only in part to the fact that few neutron beams with energies above 20 MeV were available up to now. Actually, no universal method exists so that only some systems could be measured, and data bases are often fed by model predictions, especially in the heavy nuclei. With a white beam like Gelina or nTOF, there is only one method which can be used, the in-beam γ-spectroscopy. This method was reported for the first time in 1994 by Los Alamos. We tested the feasibility of this method at the fixed beam facility of the cyclotron of Louvain-la Neuve (Belgium) and the Gelina white beam neutron source. The methodological tests performed so far towards these measurements are presented.

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