公开(公告)号：US3678274A

公开(公告)日：1972-07-18

申请号：US3678274D

申请日：1970-03-20

Applicant: PRESIDENT OF TOKYO UNIV

Inventor： KAWASHIMA NOBUKI

IPC: H01J47/06 ,  G01T1/18 ,  H01J39/26

CPC classification number: H01J47/06

Abstract: A radio-active radiation counter is provided with a counter chamber having a diaphragm-less open window, and two collecting electodes are disposed in said chamber and separated from each other. A gas to be ionized is injected in a pulse into the chamber intermittently to create a gas cloud for a short duration in the space where the electrodes are disposed, and a voltage pulse is applied across the electrodes during the presence of said gas cloud between the electrodes to operate the counter in order to measure the radiation coming into the chamber during the voltage being applied to the electrodes. Because of the absence of a diaphragm in the ray entrance window of the counter chamber, the absorption of radiation energy in a diaphragm is avoided and thereby it is possible to measure radiations of energy less than 1 Kev.

Abstract translation: 无线电激活辐射计数器设置有具有无隔膜的开放窗口的计数器室，并且两个收集电极设置在所述室中并彼此分离。 将被离子化的气体以脉冲方式间歇地注入到腔室中，以在电极设置的空间中产生短时间的气体云，并且在存在所述气体云的电极之间施加电压脉冲 用于操作计数器的电极，以便在施加到电极的电压期间测量进入腔室的辐射。 由于在反腔的射线入口窗中没有隔膜，所以避免了隔膜中的辐射能的吸收，从而可以测量小于1Kev的能量辐射。