Analysis of the FIC detector data at the n_TOF facility.

Authors :: Karadimos, D.
Vlastou, R.
Ioannides, K.
Assimakopoulos, P.
Tsagas, N.
Pavlopoulos, P.
Karamanis, D.
Papachristodoulou, C.
Stamoulis, K.
Vlachoudis, V.
Cennini, P.
Ketlerov, V.
Konovalov, V.
Source :: Nuclear Instruments & Methods in Physics Research Section B. Aug2010, Vol. 268 Issue 16, p2556-2562. 7p.
Publication Year :: 2010
Abstract: Abstract: Fission cross-section measurements with the Fast Ionization Chamber (FIC) at the CERN n_TOF facility were challenged by intense signals due to γ-rays and ultra-relativistic particles from the impact of the 20GeV proton pulses on the neutron spallation target. A method for analyzing the data taken with Flash Analog to Digital Converters (FADC) was developed to treat these problems in an automated way to provide a reliable background subtraction and a fit routine for identifying fission events even at high energies. The analysis is illustrated at the example of the fission cross-section of 238U relative to that of 235U in the energy range from 40keV to 300MeV. [Copyright &y& Elsevier]