Geiger-Muller counter tube energy compensation device

Abstract

The utility model relates to the technical field of radiation detection, in particular to an energy compensation device for a Geiger-Muller counter tube, which comprises a protective layer, a low-energy compensation layer, an energy compensation layer and a fixed layer which are sequentially arranged on the outer side of the counter tube, the protective layer is a flexible protective layer and is a first layer; the low-energy compensation layer is a metal compensation layer and is a second layer; the energy compensation layer comprises a tin alloy compensation layer A, a spacer lantern ring and a tin alloy compensation layer B and is a third layer, and the spacer lantern ring is located between the tin alloy compensation layer A and the tin alloy compensation layer B; and the fixing layer is a fourth layer. According to the utility model, energy compensation can be carried out on the Geiger-Muller counter tube, the compensation effect is good, and tin is used as a substitute, so that not only can the performance requirement be met, but also the green and harmless design requirements can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of radiation detection, in particular to an energy compensation device for a Geiger-Muller counter tube. Background Art

[0002] The Geiger-Muller counter is an ionizing radiation detector based on the gas discharge effect. It is mainly used to detect and measure ionizing radiation such as alpha particles, beta particles, gamma rays and X-rays. The Geiger-Muller counter has the advantages of high sensitivity, constant pulse amplitude, simple structure and low cost, and is widely used in various radiation detection instruments.

[0003] All kinds of radiation detectors generally have the problem of inconsistent response to different energies. Geiger-Muller counters have over-response to the energy range of 50keV-80keV. The current common practice is to use lead alloy as a compensation layer, but lead alloy is easy to react with X-rays and gamma rays to generate lead characteristic X-rays of about 80keV, resulting in a weakened compensation effect. In addition, lead is highly toxic and is not conducive to environmental protection. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a Geiger-Muller counter tube energy compensation device, which can perform energy compensation on the Geiger-Muller counter tube and has good compensation effect.

[0005] The utility model is implemented by the following technical scheme: a Geiger-Muller counter tube energy compensation device, comprising a protective layer, a low-energy compensation layer, an energy compensation layer and a fixing layer sequentially arranged on the outer side of the counter tube;

[0006] The protective layer is a flexible protective layer, which is the first layer; the low-energy compensation layer is a metal compensation layer, which is the second layer;

[0007] The energy compensation layer includes a tin alloy compensation layer A, a spacer ring and a tin alloy compensation layer B, which is the third layer, and the spacer ring is located between the tin alloy compensation layer A and the tin alloy compensation layer B;

[0008] The fixed layer is the fourth layer.

[0009] Preferably, the flexible protective layer is a silicone heat shrink tubing with a thickness of 0.2 mm.

[0010] Preferably, the metal compensation layer is copper foil with a thickness of 0.1 mm.

[0011] Preferably, the tin alloy compensation layer A and the tin alloy compensation layer B are both tin alloys with a purity of 99% and a thickness of 1 mm.

[0012] Preferably, the spacer ring is an ABS plastic ring with a thickness of 3 mm and a length of 12 mm.

[0013] Preferably, the fixing layer is acetate tape with a thickness of 0.2 mm.

[0014] Beneficial effects of the utility model:

[0015] The utility model provides an embodiment, wherein a flexible protective layer is located between a counter tube and a metal compensation layer to prevent the counter tube from being scratched during manufacture, and forms low-energy compensation with the metal compensation layer, and can compensate for energy below 25keV; the counter tube can be energy compensated by the tin alloy compensation layer A and the tin alloy compensation layer B, and will not generate rays that affect the compensation effect and cause attenuation with X-rays or gamma rays; the tin alloy compensation layer A and the tin alloy compensation layer B can be spaced by a spacing ring, so that certain low-energy rays can enter the counter tube without attenuation; the fixing layer is in close contact with the energy compensation layer, and is the fourth layer, and can fix the tin alloy compensation layer A, the tin alloy compensation layer B, and the spacing ring to prevent vibration from falling off or shifting.

[0016] The utility model can perform energy compensation for the Geiger-Muller counter tube with good compensation effect, and using tin as a substitute can not only meet performance requirements, but also meet green and harmless design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 Energy compensation principle diagram DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] like Figure 1 to Figure 2 The utility model provides an embodiment: a Geiger-Muller counter tube energy compensation device, comprising a protective layer, a low-energy compensation layer, an energy compensation layer and a fixed layer 7 which are sequentially arranged on the outer side of the counter tube 1 .

[0021] The protective layer is a flexible protective layer 2, which is in close contact with the counter tube 1 and is the first layer; the low-energy compensation layer is a metal compensation layer 3, which is in close contact with the flexible protective layer 2 and is the second layer. The flexible protective layer 2 is located between the counter tube 1 and the metal compensation layer 3 to prevent the counter tube 1 from being scratched during production, and forms low-energy compensation with the metal compensation layer 3, which can compensate for energy below 25keV.

[0022] The energy compensation layer includes a tin alloy compensation layer A4, a spacing ring 5 and a tin alloy compensation layer B6, which is close to the metal compensation layer 3 and is the third layer. The spacing ring 5 is located between the tin alloy compensation layer A4 and the tin alloy compensation layer B6. The energy compensation of the counter tube 1 can be compensated by the tin alloy compensation layer A4 and the tin alloy compensation layer B6, and will not generate X-rays or gamma rays that affect the compensation effect and cause weakening. The spacing ring 5 can space the tin alloy compensation layer A4 and the tin alloy compensation layer B6, so that certain low-energy rays can enter the counter tube 1 without attenuation.

[0023] The fixing layer 7 is in close contact with the energy compensation layer and is the fourth layer. It can fix the tin alloy compensation layer A4, the tin alloy compensation layer B6 and the spacing ring 5 to prevent them from falling off or shifting due to vibration.

[0024] In an embodiment of the utility model, the flexible protective layer 2 is a silicone heat shrink tubing with a thickness of 0.2 mm, which can better protect the counter tube 1.

[0025] In an embodiment of the utility model, the metal compensation layer 3 is copper foil with a thickness of 0.1 mm, which can better perform low-energy compensation.

[0026] In an embodiment of the utility model, the tin alloy compensation layer A4 and the tin alloy compensation layer B6 are both tin alloys with a purity of 99% and a thickness of 1 mm, which can better compensate the energy of the counter tube 1.

[0027] In one embodiment of the utility model, the spacer ring 5 is an ABS plastic ring with a thickness of 3 mm and a length of 12 mm. If it is too long or too short, the sensitive area of ​​the counter tube 1 will change to a value that does not meet the expected value.

[0028] In one embodiment of the utility model, the fixing layer 7 is an acetate tape with a thickness of 0.2 mm. The acetate tape can wrap the tin alloy compensation layer A4, the tin alloy compensation layer B6, and the spacing ring 5 and fix them to prevent vibration from falling off or shifting.

[0029] The compensation principle of the utility model is as follows:

[0030] X-rays and gamma-rays pass through the fixing layer 7, which is an acetic acid tape, and the rays penetrate the fixing layer 7 almost without damage and enter the next layer;

[0031] The rays at the left and right ends enter the tin alloy compensation layer A4 and tin alloy compensation layer B6, and the energy in the 50keV-80keV range is weakened before entering the metal compensation layer 3; after being irradiated by the rays, ordinary lead alloy diffracts the characteristic X-rays of lead (about 80keV), and energy rays that do not meet expectations appear, while the characteristic X-rays of tin alloy are not in this range (about 20keV);

[0032] The middle ray enters the spacing ring 5, which is made of ABS plastic, and the ray enters the metal compensation layer 3 almost without damage; the length of the spacing ring 5 is strictly controlled to be 12mm, and if it is too long or too short, the sensitive area of ​​the Geiger-Muller counter tube 1 will change to a value that does not meet the expected value;

[0033] The metal compensation layer 3 and the flexible protective layer 2 can make the final compensation, which can compensate for the energy below 25keV, but almost no compensation for other energies;

[0034] The compensated energy enters the Geiger-Muller counter tube 1 .

[0035] The above description is only a preferred embodiment of the present utility model and cannot be understood as a limitation of the present application. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the present utility model.

Claims

1. A Geiger-Muller counter tube energy compensation device, characterized in that: It comprises a protective layer, a low-energy compensation layer, an energy compensation layer and a fixing layer which are sequentially arranged on the outer side of the counter tube; The protective layer is a flexible protective layer, which is the first layer; the low-energy compensation layer is a metal compensation layer, which is the second layer; The energy compensation layer includes a tin alloy compensation layer A, a spacer ring and a tin alloy compensation layer B, which is the third layer, and the spacer ring is located between the tin alloy compensation layer A and the tin alloy compensation layer B; The fixed layer is the fourth layer.

2. The Geiger-Muller counter tube energy compensation device according to claim 1, characterized in that: The flexible protective layer is a silicone heat shrink tubing with a thickness of 0.2 mm.

3. The Geiger-Muller counter tube energy compensation device according to claim 1, characterized in that: The metal compensation layer is copper foil with a thickness of 0.1 mm.

4. The Geiger-Muller counter tube energy compensation device according to claim 1, characterized in that: The tin alloy compensation layer A and the tin alloy compensation layer B are both tin alloys with a purity of 99% and a thickness of 1 mm.

5. A Geiger-Muller counter tube energy compensation device according to claim 1 or 4, characterized in that: The spacer ring is an ABS plastic ring with a thickness of 3 mm and a length of 12 mm.

6. The Geiger-Muller counter tube energy compensation device according to claim 1, characterized in that: The fixing layer is acetate tape with a thickness of 0.2 mm.

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