Check patentability & draft patents in minutes with Patsnap Eureka AI!

Barium fluoride (BaF2) crystal with scintillation slow component inhibition filter piece

A barium fluoride and optical filter technology, applied in crystal growth, optics, single crystal growth, etc., can solve the problems of difficult lanthanum doping, surface wrinkles, and difficult polishing treatment, etc., to achieve mature design methods and high yield , The reliable effect of the preparation method

Inactive Publication Date: 2006-06-28
TONGJI UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They added some LaF to the ingredients used to grow the barium fluoride crystals 2 , the energy level transition corresponding to the wavelength of 325nm in the crystal is suppressed. However, although the slow component can be suppressed by the method of doping lanthanum, the inhibition ratio of the fast and slow component can only reach about 6 times, and it is not easy to do lanthanum in the crystal. , when the amount of doped lanthanum is close to 1%, the crystal is prone to large defects and wrinkles on the surface, it is not easy to polish, and the crystal is damaged due to doping with lanthanum during processing, so it cannot be repaired repeatedly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Barium fluoride (BaF2) crystal with scintillation slow component inhibition filter piece
  • Barium fluoride (BaF2) crystal with scintillation slow component inhibition filter piece
  • Barium fluoride (BaF2) crystal with scintillation slow component inhibition filter piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] When the barium fluoride crystal of the present invention is coated, at first the planes and sides of the crystal should be polished, and for the coated surface, the surface roughness after polishing is better than 20nm. When starting the coating, the coated surface of the crystal is ultrasonically Clean and wipe the surface with absorbent cotton, then put the crystal on the workpiece frame and put it into the vacuum chamber of the coating machine, and keep the room temperature during the coating. The coating material is magnesium fluoride (MgF 2 ), alumina (Al 2 o 3 ) and metal aluminum (Al), the purity of the coating material is greater than 99.9%. Use the optical film system design software to design the structure of the film system and the thickness of each layer, and set the evaluation factors for film system optimization to optimize the film system and reduce the pressure of the vacuum chamber to 6×10 -4 After Pa, use the electron gun heating device in the coat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
surface roughnessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The BaF2 crystal which has flash component to restrain light filter slice refers to plating and crystal performance improving technology of BaF2 crystal, it applies to high energy physics, nucleus iatrology, gamma radial astronomy, physical prospection. Through plating light spectrum selective multi-layer films on the surface of BaF2 crystal, the multi-layer optical light-filter films can be placted on the surface of BaF2 crystal, the thickness of films is only about 1 mum, the structure is close, the volume doesn't increase, the flash component rate increases from 0.16 to 12.8, the restraining rate can reach 80 times.

Description

technical field [0001] Barium Fluoride (BaF 2 ) crystals, involving the coating of barium fluoride crystals and the technology of improving crystal properties, applicable to high-energy physics, nuclear medicine, gamma-ray astronomy, and physical exploration. technical background [0002] In 1971, Farukhi et al. found in their research on the luminescent properties of barium fluoride crystals that after being excited by particles, it can generate phosphorescent components with a peak wavelength of 325nm and a decay time constant of 0.63μs. In 1983, Laval et al. discovered another luminescent component of barium fluoride crystals, that is, the decay time constant is only 600ps, and the fast components with emission peaks at 220 and 195nm make barium fluoride the fastest known scintillator. At the same time, it has been considered as the most radiation-resistant inorganic scintillator for a long time, so it has been valued as a fast and radiation-res...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/12G02B5/28
Inventor 吴永刚顾牡陈玲燕曹二华
Owner TONGJI UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com