Measurement of resolved resonances of 232Th(n,γ) at the n_TOF facility at CERN

F. Gunsing (1) , G. Aerts (1) , S. Andriamonje (1) , E. Berthoumieux (1) , J. Pancin (1) , L. Perrot (1) , P. Baumann (2) , M. Kerveno (2) , S. Lukic (2) , G. Rudolf (2) , B. Haas (3) , P. Pavlopoulos (4) , C. Stephan (5) , L. Tassan-Got (5) , L. Audouin (5) , L. Ferran (5) , S. Isaev (1)

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 DRS-IPHC - Département Recherches Subatomiques
3 ACEN - Aval du cycle et Energie Nucléaire
4 Pôle Universitaire Léonard de Vinci
5 IPNO - Institut de Physique Nucléaire d'Orsay

The yield of the neutron capture reaction 232Th(n,γ) has been measured at the neutron time-of-flight facility n_TOF at CERN in the energy range from 1 eV to 1 MeV. The reduction of the acquired data to the capture yield for resolved resonances from 1 eV to 4 keV is described and compared to a recent evaluated data set. The resonance parameters were used to assign an orbital momentum to each resonance. A missing level estimator was used to extract the s-wave level spacing of D0=17.2±0.9 eV.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

F. Gunsing, G. Aerts, S. Andriamonje, E. Berthoumieux, J. Pancin, et al.. Measurement of resolved resonances of 232Th(n,γ) at the n_TOF facility at CERN. Physical Review C, 2012, 85, pp.064601. ⟨10.1103/PhysRevC.85.064601⟩. ⟨in2p3-00713775⟩