Abstract:
PROBLEM TO BE SOLVED: To provide a Geiger-Muller counter in which disturbance of an electric field is prevented and a radiation detector.SOLUTION: A Geiger-Muller counter (100) includes: a cylindrical sealed tube (110) formed of glass and having a space with two hermetically sealed ends ; a rod-like part (121) arranged in a space (114); a first linear metal lead part(122) connected to the rod-like part; an anode electrode (120) wherein the first metal lead part is supported by one end of the sealed tube; an annular part (131) surrounding the periphery of the anode electrode in the space; a second linear metal lead part (132) connected to the annular part; a cathode electrode (130) wherein the second metal lead part is supported by the other end of the sealed tube; and an inert gas and a quench gas hermetically sealed in the space.
Abstract:
PROBLEM TO BE SOLVED: To provide an easy method of manufacturing a Geiger-Muller counter capable of measuring a fast neutron, and to provide a Geiger-Muller counter, and a radiation detector.SOLUTION: A method of manufacturing a Geiger-Muller counter includes a step (S101) for preparing a sealed tube having a pair of electrodes and a hollow space, sealing steps (S102, S103, S104) for sealing a halogenide composed of halogenated organics or hydrogen halide and Penning gas composed of rare gas atoms in a space, and a decomposition step (S105) for decomposing a halogenide so as to contain hydrogen gas and halogen gas.
Abstract:
PROBLEM TO BE SOLVED: To provide a gas filling type neutron radiation detector for detecting radiation capable of improving the horizontal resolution of a detector array. SOLUTION: The radiation detector (20) comprises an external casing (22) filled with gas under pressure, an anode (24), and a cathode (22). The casing (22) is formed in an elliptic cross-section which is at least uniform along the detection length as a whole. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PURPOSE:To effectively prevent the incidence of ultraviolet rays or the like and correctly measure radioactive rays by forming a radioactive ray incidence window with titanium foil. CONSTITUTION:A radioactive ray incidence window 20 is formed with a layer of titanium foil, the radioactive ray incidence window 20 has the thickness of about 6-7mu, and its periphery is welded to a cathode cylinder 12. Since the titanium foil has sufficient strength regardless of its thickness of 6-7mu a counter tube 10 is not broken even if its interior is in a decompressed state. It abounds in the light shielding property and can reliably prevent the incidence of ultraviolet rays or the like. The miscount due to the photoelectric effect is thereby prevented, and radioactive rays can be correctly detected.
Abstract:
PURPOSE:To count electrons efficiently and stably against variations of measure ment conditions by selecting a 2nd grating voltage which is obtained by a grat ing voltage detecting means and provides the largest counted value, and a 1st grating voltage corresponding to it, and obtaining the best grating voltage. CONSTITUTION:Electrons emitted by a sample 10 irradiated with light are admitted into an electron detection part provided the 1st and 2nd grating electrodes 5, 6 and counted. An arithmetic means 26 sets the electrode voltages of grating electrodes 5 and 6 to optimum values. While an anode voltage is set for an anode ring 4 by a high-voltage power source 23, a reference sample 10 is set first and the 2nd grating voltage is varied by plural 1st grating voltages to detect the 2nd grating voltage with which the peak value of the counted value is obtained. Then, the 2nd grating voltage corresponding to the maximum counted value and the 1st grating voltage corresponding to the 2nd grating voltage are selected and set as optimum values.