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- 저자 : B. Almutairi (검색결과 1 건)
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Voltage dependent pulse shape analysis of Geiger-Müller counter
B. Almutairi,T. Akyurek,S. Usman 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.4
Detailed pulse shape analysis of a Geiger-Müller counter is performed to understand the pulse shapedependence on operating voltage. New data is presented to demonstrate that not all pulses generated ina GM counter are identical. In fact, there is a strong correlation between the operating voltage and thepulse shape. Similar to detector deadtime, pulse shapes fall in three distinct regions. For low voltageregion, where deadtime was reported to reduce with increasing voltage, pulse generated in this regionwas observed to have a fixed pulse width with a variable tail. The pulse width and fall time of the tail wasobserved to be a function of applied voltage; exponentially reducing with increasing voltage with anexponent of negative 6E-04 and 2E-03 respectively. The second region showed a pulse without anysignificant tail. During this time the detector deadtime was earlier reported to be at its minimum. Thehighest voltage region demonstrated a different deadtime mechanism where the second pulse wasreduced in width. During this time the deadtime seemed to be increasing with increasing voltage. Thisdata allows us to gain some unique insight into the phenomenon of GM detector deadtime not reportedthus far.
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