Integrated gamma spectrum measurement system suitable for neutron activation analysis

An activation analysis and measurement system technology, which is applied in X-ray energy spectrum distribution measurement, radiation measurement, and measurement devices, can solve the problems of low judgment accuracy, insolvability, and large noise, and achieve high system integration and application Convenience and low number of components

Pending Publication Date: 2020-02-11
DANDONG DONGFANG MEASUREMENT&CONTROL TECHCO
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Problems solved by technology

Although this method can optimize noise filtering and improve the pass rate of energy spectrum counting, the noise in the industrial field application signal is still relatively large, and the judgment accuracy in the case of small signal accumulation is still not high, and it cannot solve other shortcomings in the first method

Method used

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  • Integrated gamma spectrum measurement system suitable for neutron activation analysis
  • Integrated gamma spectrum measurement system suitable for neutron activation analysis
  • Integrated gamma spectrum measurement system suitable for neutron activation analysis

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Embodiment Construction

[0023] Such as figure 1 It is an integrated ɣ energy spectrum measurement system suitable for neutron activation analysis. The shell (1) is made of mixed materials, which can absorb part of neutrons and shield low-energy ɣ rays. ɣ rays pass through the shell (1) and enter the scintillator (2) to generate light signals, and then the light signals enter the photomultiplier tube (3) to generate electrical signals, and the scintillator (2) and photomultiplier tube (3) constitute the detector ( 4). The voltage divider (5) provides bias voltage for the photomultiplier tube (3), the high voltage power supply (6) provides high voltage for the voltage divider, and outputs the detector signal to the digital multi-channel pulse amplitude analyzer (7), which can The spectral data is transmitted to the computer through the interface (8), and at the same time, the interface (8) can provide power for the system. A voltage divider (5), a high-voltage power supply (6), a digital multi-channe...

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Abstract

The present invention discloses an integrated gamma spectrum measurement system suitable for neutron activation analysis, which includes a detector, a header multichannel pulse amplitude analyzer, aninterface and a shell. The detector includes a scintillator and a photomultiplier; and gamma ray enters the detector and is finally converted into an electric pulse signal. The header multichannel pulse amplitude analyzer is packaged by the metal shell, which includes a voltage divider circuit, an adjustable high voltage power circuit and a multichannel spectrum acquisition circuit. The voltage divider circuit and the adjustable high voltage power circuit provide the bias voltage for each dynode of the photomultiplier. The multichannel spectrum acquisition circuit realizes the conversion of the ray pulse signal to the spectrum. An interface circuit adopts a PoE interface, which can not only supply power for the system but also realize the function of network port communication. The shell plays a role of carrying, electromagnetic shielding and radiation shielding; and all components and circuits are enclosed in the detector shell. The invention provides the gamma spectrum measurement system with small volume, low cost, convenient application, a high counting pass rate and high energy resolution.

Description

technical field [0001] The invention relates to an integrated ɣ energy spectrum measurement system suitable for neutron activation analysis, in particular to a highly integrated digital multi-channel pulse amplitude analysis technology, all components and circuits are packaged in a detector High-performance ɣ energy spectroscopy measurement system inside the housing. Background technique [0002] Neutron activation analysis uses prompt gamma ray neutron activation analysis technology. Because of its high analysis accuracy, high sensitivity, and online non-destructive measurement and many other advantages, it is widely used in the fields of industry, environment, materials, archaeology, and safety. Prompt gamma ray neutron activation analysis technology uses the neutron flow generated by the neutron source to bombard the nuclei of each element in the target sample. -14 De-excite and release ɣ-rays with an energy of 2KeV~10MeV within a short period of time, detect the rays th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/36G01T1/202
CPCG01T1/362G01T1/202
Inventor 于海明尚庆敏陈月红
Owner DANDONG DONGFANG MEASUREMENT&CONTROL TECHCO
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