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Radio active ray detection device, scintillator and radio active ray identification method

A radiation detection and radiation technology is applied in the field of radiation type identification type radiation detectors, which can solve the problems of insufficient radiation performance and high device cost, and achieve the effects of low cost, high detection efficiency and simple device structure.

Inactive Publication Date: 2005-10-12
KK TOSHIBA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the above-mentioned known radiation type identification device, an additional circuit different from that of a general scintillator detector is required, and there is a problem that the cost of the device is high.
[0008] Furthermore, these radiation discrimination methods have not been able to achieve the actual radiation detection due to factors such as signal attenuation caused by differentiation in the zero-crossing method, or deliberate signal attenuation in rise discrimination, which degrade the S / N ratio. full performance

Method used

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  • Radio active ray detection device, scintillator and radio active ray identification method
  • Radio active ray detection device, scintillator and radio active ray identification method
  • Radio active ray detection device, scintillator and radio active ray identification method

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no. 1 Embodiment

[0081] 2( a ) to ( c ) are explanatory diagrams of multiple emission characteristics of a radiation incident event. image 3 and Figure 4 It is the structure of a device for discriminating the type of radiation using the identification characteristics shown in FIG. 2 .

[0082] The radiation type detection device of this embodiment generally includes a scintillator A that emits light upon irradiation with radiation, and an identification device that identifies the type of radiation based on the light emitted by the scintillator A. The scintillator A has the following multiple light emission characteristics: a first light pulse is emitted immediately corresponding to the incidence of one radiation, and a plurality of second light pulses are emitted with a time delay relative to the first light pulse. To emit light, the probability or frequency of occurrence of the second light pulse differs depending on the energy of the incident radiation, the type of radiation, and the loss...

no. 2 Embodiment

[0100] The radiation type discrimination type radiation detection device of this embodiment has a function of counting the second light pulses generated within the time threshold, dividing the time threshold into equally spaced time widths, and The second light pulses are counted with a divided time width. That is, differently from the first embodiment, it is applied to a method in which the result of counting is not divided into double values ​​but processed as analog information.

[0101] Figure 5 A second embodiment of the radiation detection device is shown, and a radiation detection device 200 for discriminating α-rays and β-rays and counting multiple luminescence counts within a certain period of time is shown.

[0102] Such as Figure 5 As shown, the radiation detection device 200 of this embodiment is the same as that of the first embodiment in terms of the time width generator 1 and the counting device 2 that input the logic signal 101, but a multiple counting disc...

no. 3 Embodiment

[0106] In the radiation type discrimination type radiation detection device of this embodiment, the discrimination device includes: a pulse generating device with a certain time width, using the first light pulse and the second light pulse as trigger signals, which can be triggered again during the pulse output process; Width measuring device, measuring the pulse amplitude of the optical pulse output from the pulse generating device; time width comparison device, has the following functions: preset a certain time width, according to the situation of reaching the preset certain time width and not reaching In the case of , the identification output information is changed, thereby classifying the incident radiation into two types.

[0107] Figure 6 A third embodiment of the radiation detection device is shown, and a radiation detection device 300 for discriminating α-rays and β-rays and measuring the time width of multiple luminescence generation is shown.

[0108] In the prese...

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Abstract

A radiation detection device, with a simple device configuration and a low cost, and capable of discriminating and detecting the radiation ray with high detection efficiency, is provided in the invention with a scintillator for emitting light by the application of radiation and a discrimination means for discriminating the radiation ray using the emission of a scintillator. The scintillator A has multiple emission characteristics. The discrimination means has the following discriminating functions: discriminating the type, energy, and specific energy loss of the radiation irradiating on the scintillator, and detecting the radiation at the same time by detecting the occurrence probability or frequency of a first light pulse and a second light pulse.

Description

technical field [0001] The present invention relates to a technology for identifying the types of radiation in various mixed fields in radiation measurement by using a scintillation detector, in particular to a type of radiation type discrimination radiation detector, which can identify α-ray and β-ray, α-ray and γ-ray ray, α ray, and proton ray or ion beam have different charges and mass numbers for identification. Background technique [0002] Conventionally, for discrimination of radiation types suitable for radiation measurement, such as discrimination between neutrons and gamma rays, or discrimination between alpha rays and beta (gamma) rays, a discrimination method using a scintillation detector has been widely used. Among them, the former, that is, neutrons and γ-rays are often discriminated using a time discrimination method using a liquid scintillator, which is also called a zero-crossing (zero-crossing) method. This zero-crossing method utilizes the characteristic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/20G01T1/208G01T1/38G01T3/06
CPCG01T1/20G01T1/2008
Inventor 前川立行隅田晃生佐藤俊文森本总一郎
Owner KK TOSHIBA