title: Effect of time walk in the use of single channel analyzer/discriminator for saturated pulses in the 4πβ-γ coincidence experiments.
abstract: Using the TAC technique, the timing properties of a 4πβ-γ coincidence counting system were experimentally studied with an emphasis on saturated pulses. Experiments were performed for several discriminators (integral mode of TSCA) each with different kinds of timing techniques. Timing spectra were measured at various applied voltage to the 4π proportional detector covering the entire region of the plateau. Most of timing discriminators show good timing property when the pulses remain the linear region, but suddenly deteriorate after the pulses was saturated, and the timing spectra expands seriously up to a few μs in some types of timing discriminator. To overcome this problem, two techniques were proposed.
authors.affiliation: National Metrological Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 2, 1-1-1, Umezono, Tsukuba, Ibaraki 305-3068, Japan. Electronic address: kawada.t4@gmail.com.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Kawada
authors.affiliation: National Metrological Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 2, 1-1-1, Umezono, Tsukuba, Ibaraki 305-3068, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Yunoki
authors.affiliation: Japan Radioisotope Association, 2-28-45 Hon-Komagome, Bunkyo-ku, Tokyo 113-8941, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Yamada
authors.affiliation: National Metrological Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 2, 1-1-1, Umezono, Tsukuba, Ibaraki 305-3068, Japan.
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Hino
keywords: 4πβ–γ coincidence counting; Discriminator; Saturated pulses; TAC; Time walk; Timing single channel analyzer; Trailing edge constant fraction; Two improved techniques