| A. Van Lauwe, J.-C. David, D. Doré, M.-L. Giacri-Mauborgne, D. Ridikas, J-M. Laborie, X. Ledoux,
A. Binet, A. Bloquet, V. Le Flanchec, G. Vallart, N. Arnal |
A renewed interest in photofission reactions is motivated by different applications, based on detection of delayed neutrons (DNs). Unfortunately, available DN data from photofission are scarce, incomplete and in some cases contradictory. Therefore, an experimental program of measurements of DN yields and time spectra was started for a number of high priority nuclei as uranium and plutonium isotopes including some minor actinides to provide good quality photofission DN data. In this paper we present the first experimental results for 238U and 232Th in the energy range of the endpoint Bremsstrahlung photons from 12 MeV to 18 MeV. In parallel to the experimental program, systematic DN calculations were performed in order to check the model validity against available data and to provide tabulated DN parameters for the rest of the actinides. |
