Open Access
ND 2007
Article Number 150
Number of page(s) 4
Section Neutron cross section measurements
Published online 17 June 2008
International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07431

Measurements of the branching ratio of the 209Bi(n,γ)210gBi/210mBi reactions at GELINA

A. Borella1, 2, T. Belgya3, E. Berthoumieux1, N. Colonna4, C. Domingo-Pardo5, J.C. Drohe2, F. Gunsing3, S. Marrone4, T. Martinez6, C. Massimi7, P.M. Mastinu8, P.M. Milazzo9, P. Schillebeeckx2, G. Tagliente4, J. Tain5, R. Terlizzi4 and R. Wynants2

1  CEA/Saclay, DSM/DAPNIA/SPhN, 91911 Gif-sur-Yvette, France
2  EC-JRC-IRMM, Retieseweg 111, 2440 Geel, Belgium
3  Institute for Isotopes Hungarian Academy of Sciences, CRC HAS, P.O. Box 77, 1525 Budapest, Hungary
4  Istituto Nazionale di Fisica Nucleare, Bari, Italy
5  Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia, Spain
6  Centro de Investigaciones Energeticas Medioambientales y Technologicas, Madrid, Spain
7  Istituto Nazionale di Fisica Nucleare, Bologna, Italy
8  Laboratori Nazionali di Legnaro, Legnaro, Italy
9  Istituto Nazionale di Fisica Nucleare, Trieste, Italy

Published online: 21 May 2008

Measurements to determine the energy dependent branching ratio for the neutron induced capture reaction on 209Bi were performed at the time-of-flight facility GELINA of the IRMM in Geel (Belgium). By using germanium γ-ray detectors in combination with the time-of-flight technique, the γ-ray spectra following neutron capture on 209Bi were determined around 6 neutron resonances between 0.8 keV and 7.0 keV. The relative partial cross sections were obtained by correcting the full energy net peak areas for the effective γ-ray detection efficiency and internal conversion. The effective γ-ray efficiency was obtained from a Monte Carlo model validated through measurements with calibrated sources. The results of a preliminary analysis are given in this paper.

© CEA 2008