Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (3): 030401 doi: 10.13538/j.1001-8042/nst.2013.03.012

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Digital coincidence acquisition applied to portable β liquid scintillation counting device

REN Zhongguo1,2  HU Bitao1  ZHAO Zhiping LI Dongcang1   

  1. 1School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China 2China Academy of Engineering Physics, Mianyang 621907, China
  • Received:2013-03-14
  • Contact: LI Dongcang E-mail:pelab@lzu.edu.cn
  • Supported by:

    Supported by National Natural Science Foundation of China (Nos.11135002 and 91026021)

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REN Zhongguo, HU Bitao, ZHAO Zhiping, LI Dongcang. Digital coincidence acquisition applied to portable β liquid scintillation counting device.Nuclear Science and Techniques, 2013, 24(3): 030401     doi: 10.13538/j.1001-8042/nst.2013.03.012

Abstract:

A digital coincidence acquisition system applied to a portable liquid scintillation counting device is developed. The system which simplifies the device design consists of a digitizer card of Agilent U1066A DC438, a discriminator and a host computer. The anode analog pulses from two photomultiplier tubes are captured by the system, which adopts the sequence acquisition storage mode. By choosing proper threshold for each channel, coincidence time window of ±30 ns, and comparing the pulse amplitudes from two channels, the portable scintillation counting device can be used to detect β particles. For the unquenched standard 3H sample, the results show that the detection efficiency is (58.5±0.1)% and the background is (86.7±0.7) cpm. Meanwhile, 3H β spectrum is obtained.

 

Key words:  Digitizer, Liquid scintillation, Coincidence