Processing method for large-area annular plastic scintillator

A technology of a plastic scintillator and a processing method, which is applied in the field of nuclear detection, can solve the problems of a large difference in detection efficiency, uneven distribution of paratriphenylene, and a large-area plastic scintillator yield of less than 10%, so as to improve the yield, Good response uniformity

Active Publication Date: 2019-04-05
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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Problems solved by technology

For large-area plastic scintillators, p-triphenyl is more affected by factors such as density and gravity. Using general production methods will often lead to serious uneven distribution of p-triphenyl, so that the processed large-area plastic scintill...

Method used

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with specific embodiments.

[0029] A large-area annular plastic scintillator processing method, the large-area annular plastic scintillator is used for radiation detection at the annular interface of the container, such as the cover seam between the circular container cover and the container body at the container annular interface , the measurement object is an area up to 400 ~ 500cm 2 The annular plane detection surface of the method comprises the following steps:

[0030] S1: Preparation of large-area plastic scintillators

[0031] 1.1 Grind triphenylene particles into powder and inject them into high-precision polishing molds;

[0032] 1.2 Put the polyethylene particles into the crucible and heat to 150-170°C, then inject the polyethylene into the high-precision polishing mold;

[0033] 1.3 First control the temperature of the mixture in the high-precision polishing mold at 130-150°C t...

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Abstract

The invention relates to the technical field of nuclear detection, and particularly discloses a processing method for a large-area annular plastic scintillator. The method comprises the following steps: S1: manufacturing the large-area plastic scintillator; S2: cutting the large-area plastic scintillator; and S3: polishing and aluminizing the large-area plastic scintillator. Performing irradiationmeasurement on a spot-shaped [beta]-plane radioactive source with a diameter of 2mm by the arge-area plastic scintillator manufactured by the method of which the response uniformity is three times better than the plastic scintillator obtained by using a general manufacturing method.

Description

technical field [0001] The invention belongs to the technical field of nuclear detection, and in particular relates to a large-area ring-shaped plastic scintillator processing method. Background technique [0002] In nuclear detection technology, plastic scintillator-coated ZnS crystals have high detection efficiency for α, β and γ rays, and have excellent plasticity, and are often designed into various special geometric shapes for making α, β Radiation detector with gamma rays. For a large-area special geometric shape of the measured object, it is necessary to process a large-area plastic scintillator corresponding to it. Spraying ZnS (Ag) on ​​the surface of the plastic scintillator is the ZnS crystal plating of the plastic scintillator to meet the requirements of α and β. Radiation detection with gamma rays is required. For example, relative to the measurement of the α, β and γ rays at the annular interface of the container, that is, the gap between the circular contain...

Claims

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Application Information

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IPC IPC(8): G01T1/203
CPCG01T1/203
Inventor 陈小军梁勇王文秀方开洪李玉军苏功建殷敏陈效楠
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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