International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07415

Measurement of ²³²Th(n,5nγ) cross sections from 29 to 42 MeV

M. Kerveno¹, R. Nolte², P. Baumann¹, Ph. Dessagne¹, E. Jericha³, S. Jokic⁴, S. Lukic⁵, J.P. Meulders⁶, A. Nachab⁷, A. Pavlik⁸, M. Reginatto² and G. Rudolf<sup>1

1</sup>  Institut Pluridisciplinaire Hubert Curien, Département Recherche Subatomique, 67037 Strasbourg, France
²  Physikalisch-Technische Bundesanstalt, 38023 Braunschweig, Germany
³  Atominstitut der Österreichischen Universitäten, Technische Universität Wien, 1020 Wien, Austria
⁴  Vinca Institute of Nuclear Sciences, Belgrade 11001, Serbia
⁵  GSI, 64291 Darmstadt, Germany
⁶  Institut de Physique Nucléaire, 1348 Louvain-la-Neuve, Belgium
⁷  Centre d'Études Nucléaires de Bordeaux Gradignan, 33175 Gradignan, France
⁸  Fakultät für Physik, Universität Wien, 1090 Wien, Austria

maelle.kerveno@ires.in2p3.fr

Published online: 21 May 2008

Abstract
The excitation function of the reaction ²³²Th(n,5nγ)²²⁸Th from 29 to 42 MeV has been measured for the first time at the quasi-monoenergetic neutron beam of the UCL cyclotron CYCLONE employing the ⁷Li(p,n) source reaction. Taking advantage of the good energy resolution of the planar High Purity Germanium (HPGe) detectors, prompt γ-ray spectroscopy was used to detect the γ rays resulting from the decay of excited states of nuclei created by the (n,xn) reactions. The neutron beam was characterized by a combination of time of flight measurements carried out using a liquid scintillation detector and a ²³⁸U fission ionization chamber and fluence measurements carried out using a proton recoil telescope. The preliminary results are compared with calculations performed using the TALYS-0.72 code.

© CEA 2008