Seabed in-situ integrated neutron activation analysis system

A technology of activation analysis and neutron, which is applied in the direction of using neutrons for material analysis, analyzing materials, and using wave/particle radiation for material analysis, etc. It can solve the problem of increasing X-ray spectrum background, seabed sediment damage, instrument damage, etc. problem, to achieve the effect of increasing the reaction cross section, high overall structural strength and small damage

Pending Publication Date: 2017-12-12
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, although the detection window can weaken the absorption of X-rays, a certain amount of X-rays is still absorbed, and the detection window is relatively fragile, and it is easily damaged by seabed sediments, resulting in damage t

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  • Seabed in-situ integrated neutron activation analysis system
  • Seabed in-situ integrated neutron activation analysis system

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Example Embodiment

[0022] Embodiment 1: see figure 1 , in the prior art, this structure is often used to continue the excitation and detection schematic diagram of the seabed in-situ X-ray fluorescence measurement sample. As can be seen from the figure, the excitation and detection device 6 is hollow as a whole, and an X-ray tube 2 and an X-ray detector 7 are arranged inside, and a detection window 5 is provided at the bottom. The angle between the X-ray tube 2 and the horizontal plane is α, and the X-ray detector 7 and the horizontal plane The included angle of the horizontal plane is β, the X-ray tube 2 is connected to the power controller 3, and the X-ray detector 7 is connected to the signal processing circuit 4; The characteristic X-rays are then detected by the X-ray detector 7 for quantitative and qualitative analysis. However, due to the weak penetrating ability of X-rays, it is easily absorbed by seawater and cannot be irradiated to seabed sediments to generate characteristic X-rays of...

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Abstract

The invention discloses a seabed in-situ integrated neutron activation analysis system. The seabed in-situ integrated neutron activation analysis system comprises a detector assembly, an armored cable and a control system, wherein the detector assembly is connected with the control system by virtue of the armored cable, the detector assembly comprises a body, a neutron source and a detector which are arranged in the body as well as a partition plate which is disposed between the neutron source and the detector and made of a neutron absorption material, and the body is made into a solid body by adopting a C, H macromolecular material; the neutron source is used for transmitting neutrons to radiate a seabed deposit, the seabed deposit is activated by the neutrons to generate instant gamma rays, and the outer wall of the neutron source is coated with a lead layer for shielding spontaneous gamma rays of the neutron source; the partition plate is used for absorbing the neurons directly transmitted by the neutron source onto the detector; and the detector is used for collecting the instant characteristic gamma rays and transmitting detected data to the control system to be analyzed. The seabed in-situ integrated neutron activation analysis system does not add a background of the detector and is simple in structure, high in strength, free from a detection window, small in damage on the detector and long in service life.

Description

technical field [0001] The invention relates to a neutron detection device, in particular to a seabed in-situ integrated neutron activation analysis system. Background technique [0002] At present, the detection of seabed sediments is generally divided into two methods. The first method is to directly sample the seabed sediments, and then perform physical or chemical analysis on board or on land to obtain the contents of various seabed sediment elements. The second approach involves in situ and real-time measurements of seafloor sediments followed by qualitative and quantitative analysis of seafloor elements. However, the first method requires steps such as sampling, processing or transporting the sample, which takes a long time and these steps are cumbersome. Therefore, the detection of seabed sediments is now slowly turning to the second method. The second method completely avoids the steps of sampling and processing seabed sediment samples. It can directly measure the...

Claims

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Application Information

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IPC IPC(8): G01N23/00
CPCG01N23/005G01N2223/0745G01N2223/635
Inventor 成毅庹先国杨剑波廖佳威刘欢
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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