Glass scintillator for thermal neutron detection and its preparation method

A thermal neutron and scintillator technology, which is applied in the field of scintillator materials and its preparation, can solve the problems of low detection efficiency of glass for neutrons and inability to detect thermal neutrons, and achieve high detection efficiency of thermal neutrons and resistance to deliquescence Strong performance, strong acid and alkali corrosion resistance

Active Publication Date: 2007-01-31
CHINA BUILDING MATERIALS ACAD
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Problems solved by technology

There are also several units in China that have started research, but the detection efficiency of the studied glasses for neutrons is not high, mainly because neutrons have no charge and are neutral high-energy particles, so they cannot directly cause material ionization and are regarded as detection
The detection of ne

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  • Glass scintillator for thermal neutron detection and its preparation method
  • Glass scintillator for thermal neutron detection and its preparation method
  • Glass scintillator for thermal neutron detection and its preparation method

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Embodiment Construction

[0040] The present invention is a kind of Ce 3+ Li-Al-Si glass scintillator for the luminescent center. The research of the present invention shows that Ce 3+ Doped lithium-6 glass scintillator is an ideal detector for low-energy neutrons, especially thermal neutrons. It has the characteristics of short light decay time, good temperature performance and high thermal neutron detection efficiency. In addition, it is resistant to deliquescence Performance and acid and alkali corrosion resistance are strong, so in the harsh occasions of corrosive liquid and steam, Ce 3+ Doped Li-6 glass scintillators are almost the only available thermal neutron detectors.

[0041] Ce 3+ The detection of neutrons by doped lithium-6 glass scintillators is based on the nuclear reaction method. Its main component is Li 2 O, SiO 2 and Al 2 o 3 , containing a small amount of Ce 2 o 3 Used as an activator. Neutrons are injected into the scintillator and are 6 Li nuclear capture produces a nu...

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Abstract

The present invention discloses a glass scintillator for detecting thermal neutron and its preparation method. It is characterized by that it uses Ce3+ as lithium-6 glass scintillation material, the lithium element is existed in the glass scintillator in the form of lithium-6 isotope, and has the action of producing nuclear reaction. The luminous efficiency of glass scintillator obtained by making raw materials undergo the three steps of preparing material, melting and annealing is 12% of NaI(T1), strongest emission wavelength is about 400nm, UV cut-off wavelength is 360nm, luminous decay time is about ns and thermal neutron detection efficiency is about 90%. Said glass scintillator mainly is used for detecting thermal neutron, and also can be used for detecting alpha ray, beta ray and gamma ray, etc.

Description

Technical field: [0001] The present invention relates to scintillator material and its preparation method, especially relate to can be used for thermal neutron detection with Ce 3+ A lithium-6 glass scintillator with a luminescent center. Background technique: [0002] A scintillator is a luminescent material that can convert the ionization energy of X-rays, r-rays or high-energy particles into ultraviolet / visible light. Since Hofstadter et al. discovered the scintillation properties of NaI:Tl crystals in 1948, the research, development and application of scintillators have made great progress. There are many kinds of scintillators, including solid scintillators, liquid scintillators and gas scintillators from the state of matter. For solid scintillators, they are divided into organic scintillators, crystal scintillators, glass scintillators, etc. Glass scintillator is an amorphous inorganic non-metallic material. It has the advantages of adjustable performance, simple pr...

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Application Information

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IPC IPC(8): C03C3/083C03C4/00
Inventor 高祀建朱永昌刘峻关铭
Owner CHINA BUILDING MATERIALS ACAD
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