Color Centers in the Near Infrared Region in Crystals MFX (M = Ba, Sr; X = Cl, Br)

✍ Scribed by Wei Zhao; Yan-Ming Mi; Zeng-Fu Song; Mian-Zeng Su

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 187 KB
• Volume: 103
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1993.1117

✦ Synopsis

Color centers with absorption bands in the near infrared region (peaking near (900 \mathrm{~nm}) ) in (\mathrm{X})-rayed (M \mathrm{~F} X) crystals have been found. They might be attributed to the aggregates of (F\left(X^{-}\right))centers which are similar to (M) centers in (M X) crystals. The interconversion among (F\left(\mathrm{~F}^{-}\right), F\left(\mathrm{Br}^{-}\right)), and (M) centers in (\mathrm{BaFBr}) crystals has been found. These aggregated color centers are stable and exhibit stimulable absorption bands in the region from 700 to (1000 \mathrm{~nm}). Therefore some solid state lasers can be used as stimulating light sources instead of He-Ne lasers for reading the information stored in PSL image plates made of these X-ray storage phosphors. (\mathcal{O} 1993) Academic Press. Inc.