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ji suan ji kong zhi de lie biao fang shi duo can shu ge(li)-ge(li) fu he xi tong
Li Shenggang Yuan Guanjun Weng Peikun For many years;the coicidence measurement techniques have often played an impor- tant role in the experiments of nuclear physics. Since the invention of the Ge detector;which has an excellent energy resolution and larger volume;the coincidence methods have greatly been improved. As the Ge detector has larger capacitance and small pulse-height and various rise time of pulse;its timing seems more difficult.A Ge -Ge list mode multiparameter system with the Scorpio-3000 multichannel computer system and two large Ge detectors has been set up and adjusted.The system is capable of processing 1000 events/s and E-E-T analysis in 4096 × 4096×1024 channels. The play back sorting of a 2500 feet magnetic tape is completed in 90 minutes;and the work can be done with the same computer on the spot. The time resolution is 30 ns at 1.33 MeV y ray and true/false coincidence ratio is 65:1.
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