Active Member
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[China]
Address: No.200, Zgaoxian Road, Jiading Zone, Shanghai, China
Contact name:sales
Nanjing Crylink Photonics Co.,Ltd |
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Product Details
Cadmium tungstate CdWO4 (CWO), due to its low intrinsic background and afterglow together with sufficiently high light yield, is the most promising for spectrometry and radiometry of radio nuclides under extremely low activities, and also for computer tomography.
The crystal is transparent and emits light when it is hit by gamma rays and x-rays, making it useful as a detector of ionizing radiation. Its peak scintillation wavelength is 480 nm (with emission range between 380-660 nm), and efficiency of 13000 photons/MeV. It has a relatively high light yield, its light output is about 40% of NaI(Tl), but the time of scintillation is quite long (1215 s). It is often used in computed tomography. Combining the scintillator crystal with externally applied piece of boron carbide allows construction of compact detectors of gamma rays and neutron radiation.
Specifications
| Scintillation Properties | |
Materials | CdWO4 |
Light yield (Photon/MeV) | 13000 |
Decay time (s) | 12-15 |
Peak emission (nm) | 480 |
After glow | 0.1%@6ms |
Density (g/cm3) | 7.9 |
Hygroscopicity | No |
Polishing Specification for Optical Grade | |||
StandardPrecision | High Precision | Super Precision | |
Orientation Tolerence | ＜ 1° | ＜ 0.5° | ＜ 0.2° |
Thickness/Diameter Tolerance | ±0.10 mm | ±0.05 mm | ±0.02 mm |
Surface Flatness@633nm | ＜-2 | ＜/2-/4 | /4-/6 |
Wavefront Distortion | ＜(2-4) | ＜(1-2) | ＜(-/2) |
Surface Quality | 60/40 | 40/20 | 20/10 |
Parallel | 45 | 1 | 10 |
Perpendicular | 60 | 30 | 20 |
Clear Aperture | ＞90% | ||
Chammfer | ＜0.2mm×45° | ||
Coating | Available upon request | ||
