Cadmium tungstate
Inquiry
| Post Date: | May 11,2017 |
| Expiry Date: | Nov 07,2017 |
| Detailed Description: |
Cas No. :7790-85-4
Cadmium tungstate (CdWO4 or CWO), the cadmium salt of tungstic acid, is a dense, chemically inert solid which is used as a scintillation crystal to detect gamma rays. It has density of 7.9g/cm3 and melting point of 1325°C. It is toxic if inhaled or swallowed. Its crystals are transparent, colorless, with slight yellow tint. It is odorless. Its CAS number is 7790-85-4. It is not hygroscopic.
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 480nm (with emission range between 380-660nm), 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 (12−15 μs). It is often used in computed tomography. . Cadmium tungstate was used as a replacement of calcium tungstate in some fluoroscopes since 1940's. Very high radiopurity allows to use this scintillator as a detector of rare nuclear processes (double beta decay, other rare alpha and beta decays) in low-background applications. For example, the first indication of the natural alpha activity of tungsten (alpha decay of 180W) had been found in 2003 with CWO detectors. Due to different time of light emission for different types of ionizing particles, the alpha-beta discrimination technique has been developed for CWO scintillators. Cadmium tungstate films can be deposited by sol-gel technology. Cadmium tungstate nanorods can be synthesized by a hydrothermal process. Similar materials are calcium tungstate (scheelite) and zinc tungstate. It is toxic, as are all cadmium compounds. |
| CAS Registry Number: | 7790-85-4 |
| Synonyms: | ;cadmium wolframate;cadmium(+2) cation; oxygen(-2) anion; tungsten;cadmium - dihydroxy(dioxo)tungsten (1:1);Cadmium tungsten oxide; |
| Molecular Formula: | H2CdO4W |
| Molecular Weight: | 362.2645 |
| Molecular Structure: | 
|
| Company: | Yunnan Titan New Metarials technology |
| Contact: | 0871-65902281 |
| Tel: | 15198714250 |
| Fax: | |
| Email: | info@allinorganics.com |
-
Disclaimer statement:The information and data included above have been realized by the enterprises and compiled by the staff, and are subject to change without notice to you. The Chemnet makes no warranties or representations whatsoever regarding the facticity, accuracy and validity of such information and data. In order to ensure your interest, we suggest you chose the products posted by our gold suppliers or VIP members.
