Nuclear radiation and metal dual-energy detection security-check door

Abstract

The invention provides a nuclear radiation and metal dual-energy detection security-check door. The door comprises a left side door and a right side door which are vertically arranged in parallel andoppositely, a control box is mounted at the top of upper ends of the left side door and the right side door through bolts, the inside of the left side door and the right side door is provided with a sensing area from top to bottom, the sensing area comprises a metal detector and a nuclear radiation detector, the metal detector and the nuclear radiation detector both are connected on the control box; a detection head of the nuclear radiation detector is composed of a scintillation crystal and a silicon photomultiplier, a rear end face of the scintillation crystal is closely attached to a surface of the silicon photomultiplier, and the scintillation crystal is one of yttrium silicate and bismuth germanate. The nuclear radiation and metal dual-energy detection security-check door provided bythe invention is simple in structure and convenient to use, realizes a function of detecting metals and nuclear radiation at the same time by combination of the metal detector and the nuclear radiation detector, improves detection varieties of the security-check door, and has high sensitivity and adaptability.

Description

technical field [0001] The invention mainly relates to the field of detectors, in particular to a nuclear radiation and metal dual-energy detection security gate. Background technique [0002] All kinds of existing security gates are mainly focused on metal detection, and are mainly used in airports, stations, large conferences and other public places with a large flow of people to check hidden metal objects on people's bodies, such as guns, controlled knives, etc. However, with the continuous development of industrialization and the continuous advancement of science and technology, people have higher and higher requirements for security inspection, and single metal detection has gradually begun to fail to meet daily needs. [0003] NaI sodium iodide or LYSO yttrium lutetium silicate is commonly used as the detector crystal in nuclear radiation detectors. Sodium iodide is used, and the crystal needs to be sealed with a metal, such as an aluminum shell, and needs moisture-pro...

AI Technical Summary

Problems solved by technology

However, with the continuous development of industrialization and the continuous advancement of science and technology, people have higher and higher requirements for security inspection, and single metal detection has gradually begun to fail to meet daily needs.

[0003] NaI sodium iodide or LYSO yttrium lutetium silicate is commonly used as the detector crystal in nuclear radiation detectors. Sodium iodide is used, and the crystal needs to be sealed with a metal, such as an aluminum shell, and needs moisture-proof treatment, which is susceptible to damage in a strong magnetic environment. Interference, small adaptability; using yttrium lutetium silicate, the crystal needs to use the background, which has certain restrictions on radiation monitoring

In addition, in commonly used radioactive source detectors, photomultiplier tubes are used behind the crystal, but because photomultiplier tubes have no anti-magnetic properties, they cannot be used in strong magnetic environments.

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