Analysis of the FIC detector data at the n_TOF facility

作者：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

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2010, 268(16): 2556-2562.

DOI：10.1016/j.nimb.2010.05.006

• Pulse shape analysis
• Digital signal processing
• Neutron induced fission
• Fission ionization chamber
• Neutron time of flight
• n_TOF

Fission cross-section measurements with the Fast Ionization Chamber (FIC) at the CERN n_TOF facility were challenged by intense signals due to gamma-rays and ultra-relativistic particles from the impact of the 20 GeV 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 (238)U relative to that of (235)U in the energy range from 40 key to 300 MeV.

• 出版日期2010-8-15