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Flicker activity meter

A technology of activity meter and scintillator, which is applied in the field of nuclear technology application and measuring instruments, can solve the problems of high cut-off energy threshold, high cost, high working voltage, etc., and achieve the effect of reducing cost and improving sensitivity

Inactive Publication Date: 2007-04-25
HTA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of high working voltage of the existing activity meter, need to be filled with high-pressure gas, few types of particles to be measured, high cut-off energy threshold and high cost, etc., and provides an activity meter capable of measuring various particles and having a large activity range

Method used

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  • Flicker activity meter

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Embodiment Construction

[0009] The present invention will be further elaborated below in conjunction with embodiment.

[0010] As shown in the figure, the probe bracket 5 is provided with an assembly composed of a voltage dividing resistor 10, a photomultiplier tube 3 and a scintillator 2, which are closely connected in sequence. The assembly is placed in a cylindrical circular probe wall 4, and the probe wall 4 The probe cover 1 is arranged on the top, and the material used for the probe wall 4 and the probe cover 1 is the same as that used for the shell in the previous activity meter, but the thickness can be greatly reduced because it does not need to withstand the pressure of high-pressure gas. The voltage dividing resistor 10 mentioned above is used to divide the voltage of the photomultiplier tube. A photocathode of a general model selected by the photomultiplier tube 3 is connected to the scintillator, and the scintillator 2 may be an organic scintillator or an inorganic scintillator. When th...

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Abstract

The invention relates to a twinkled activity indicator belonging to the field of nuclear technique applications and measuring instruments. The activity indicator contains a probe bracket, the partial pressure resistance is mounted on the bracket, and the photomultiplier is mounted on the partial pressure resistance, the scintillator is mounted on the photomultiplier, under the bracket there are signal output connections which connect with the anode of photomultiplier and high pressure connections which connect with photomultiplier via the partial pressure resistance. Because the detecting head is scintillation crystal not the ionization chamber with thick wall, the energy-limiting valve of testing nuclide and the work voltage can be dropped, the alpha, beta charged particles can be detected, and the efficiency of detecting the low energy photon nuclide can be improved. Because of the photomultiplier, the pulsing signals can be measured, and the sensibility of the detecting head can be improved. According to the kinds of the nuclides, you can choose detector with different crystals that it can drop the cost, and it is economic and practical for medium-sized, pint-sized or county hospitals.

Description

technical field [0001] The invention belongs to the fields of nuclear technology application and measuring instruments, and in particular relates to a scintillation activity meter. Background technique [0002] The activity meter is an instrument for measuring radioactive activity. It is widely used in nuclear research and teaching, nuclear technology applications, especially in nuclear medical institutions. [0003] The detector of the existing activity meter is an ionization chamber. The detection method is to put the radioactive source to be measured into a sealed ionization chamber, and separate the positive and negative ions through a high voltage of about 800v to form a DC signal output. The magnitude of the DC signal is related to the radiation The activity of the source is linear within a certain range, the output DC signal is amplified by the amplifier, and then the data is processed and displayed, and the activity of the radioactive source can be measured. The pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/202G01T1/20
Inventor 姚历农颜素娟张文在綦杰
Owner HTA CO LTD
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