Seabed in-situ integrated neutron activation analysis system

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...

AI Technical Summary

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 to the instrument.

In addition, since the X-ray tube produces X-rays, this will increase the background of the X-ray spectrum detected by the detector, which will have a certain impact on the content measurement of seabed sediment elements.

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