A Dead-time correction method for multiple -ray detection

Kimura, Atsushi   ; Furutaka, Kazuyoshi  ; Goko, Shinji; Harada, Hideo   ; Igashira, Masayuki*; Kamiyama, Takashi*; Katabuchi, Tatsuya*; Kin, Tadahiro; Kino, Koichi*; Kitatani, Fumito  ; Kiyanagi, Yoshiaki*; Koizumi, Mitsuo ; Mizumoto, Motoharu*; Nakamura, Shoji  ; Ota, Masayuki; Oshima, Masumi; Toh, Yosuke   

To correct dead-time effect and measure high-precision neutron cross-section data, we have tested a dead-time correction method. In this method, random timing pulses are input to every pre-amplifiers of the Ge crystals via test-signal inputs. Both the random timing pulses and the other pulses originated from prompt -rays are measured with our DAQ. At the same time, the inputs random pulses are counted with another system consisting of a fast timing amplifier, a CFD, and a counter. Because dead-time affects similarly both the random timing pulses and the measured prompt -rays, we can calculate dead-time by comparing the number of the input random pulses measured using the counter with the area of the peak due to the pulses from the pulse generator measured with our DAQ.