International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07364

A new high efficiency array of C₆D₆ detectors for capture cross section measurements at GELINA

C. Sage¹, E. Berthoumieux², O. Bouland³, F. Gunsing², A.J.M. Plompen¹, P. Schillebeeckx¹, P. Siegler¹, N. van Opstal⁴ and R. Wynants<sup>1

1</sup>  JRC, IRMM, Neutron Physics Unit, 2440 Geel, Belgium
²  CEA Saclay, DSM/DAPNIA/SPhN, 91191 Gif-sur-Yvette, France
³  CEA Cadarache, DEN/CAD/DER/SPRC/LEPh, 13108 Saint-Paul-lez-Durance, France
⁴  XIOS, Hogeschool Limburg, 3590 Diepenbeek, Belgium

christophe.sage@ec.europa.eu

Published online: 21 May 2008

Abstract
Neutron capture cross section measurements at the Geel Electron Linear Accelerator (GELINA) rely on the use of H-free deuterated benzene C₆D₆ liquid scintillators. A new design of Aluminium canned C₆D₆ detectors was studied to improve the performances (high gamma efficiency vs. low neutron sensitivity) of the cylindrical previous ones: on the basis of a truncated 5-sides pyramid, the new detectors were developed and tested in Geel, and used in a preliminary capture cross section measurement on ¹⁹⁷Au in a 4 detectors setup.

© CEA 2008