Novel scintillation detector with high photon transmission efficiency

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...

AI Technical Summary

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 radiation detection, but it has a complex radioactive background spectrum, which brings great challenges to spectrum analysis under background conditions. Difficult; BGO detector has the worst resolution, but it has high detection efficiency for gamma-ray stopping power, weak radioactive background and not easy to deliquescence

The above-mentioned detectors exhibit different shortcomings and cannot meet the needs of cutting-edge experimental science to a large extent.

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