Novel scintillation detector with high photon transmission efficiency

A technology for scintillation detectors and transmission efficiency, applied in the field of ionizing radiation detectors, can solve problems such as poor time resolution, difficult deliquescence, and difficult spectrum analysis

Inactive Publication Date: 2018-02-13
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Comparing the three detectors with each other, it is found that the time resolution of the NaI(Tl) detector is poor, and the energy resolution is not as good as that of LaBr 3 The detector is good, but its natural radiation background spectrum is simple, and it is easier to analyze the energy spectrum in the later stage; LaBr 3 The detector has great advantages in time resolution and energy resolution, and provides a good detection method for the field of ionizing

Method used

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  • Novel scintillation detector with high photon transmission efficiency
  • Novel scintillation detector with high photon transmission efficiency
  • Novel scintillation detector with high photon transmission efficiency

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Embodiment 1

[0019] New lanthanum bromide detectors such as figure 1 , figure 2 Shown. The crystal (3) is a cylinder, and half of the side surface and two bottom surfaces are wrapped with a reflective layer. The reflective layer includes a reflective side surface (2) and a reflective bottom surface (14) (16). The inner side of the polytetrafluoroethylene is coated with barium sulfate. There are two convex semi-circular rings (4) on the reflective side (2) to make a vacuum layer between the reflective layer and the crystal, and a small convex ring on the reflective bottom surface (14) (16) to make the reflective layer and the crystal There is a vacuum layer in between, and an antireflection film (5) and an optical glass convex lens (13) are added at the exit end of the crystal (3). The front end of the detector is provided with a thin metal shell (1) as a front cover to protect the internal structure, and the crystal is connected by an antireflection film (5), an optical glass convex lens (...

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Abstract

The invention discloses a novel scintillation detector with high photon transmission efficiency. The novel scintillation detector has the principle that when rays enters a crystal, secondary electronsare generated near the surface of the incidence end of the crystal (3), and fluorescence is generated; a part of fluorescence photons can be absorbed and consumed by the crystal and can escape to a position outside the crystal. The light path is reduced in a lateral window opening emitting mode; the photon collection is more facilitated. The escaped photon returns into the crystal (3) through thereflection by a reflecting layer; the generated photons pass through an antireflection film (5), a coupling agent (11), an optical glass convex lens (13) and a light guide cavity (12) to enter an optical cathode (9) of an electronics system (22) for generating photoelectrons; the photoelectrons are amplified and shaped by the subsequent electronic element to from a pulse signal; the event is finally recorded as a radiation event.

Description

Technical field [0001] The invention relates to the field of ionizing radiation detectors, in particular to a new type of scintillation detector with high photon transmission efficiency applied to gamma-ray energy spectrum measurement. The use of a new type of scintillation detector will theoretically achieve better resolution and detection efficiency, which is of great help in improving the performance of the scintillation detector. Background technique [0002] Scintillation detectors are commonly used ionizing radiation detectors, which are widely used in industrial and agricultural production, medical and health diagnosis and treatment, environmental protection, nuclear spectroscopy research, and safety inspections. The scintillator detector is composed of three main parts: scintillator, photomultiplier tube and corresponding electronic system. [0003] Scintillators are generally made of functional materials that can interact with radiation rays to produce fluorescence. Accor...

Claims

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Application Information

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IPC IPC(8): G01T1/202
CPCG01T1/2023
Inventor 许旭黑进国吕翌丰陆景彬
Owner JILIN UNIV
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