Fluorescence and lifetime studies of Ho3+: CaF2

✍ Scribed by Bansi Lal; D. Ramachandra Rao

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 347 KB
• Volume: 53
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(78)85390-1

✦ Synopsis

Four fluorescence groups in the wavelength region 4775-7590 A have been recorded in Ho3+ : CaF2 single crystals in the concentration range from 0.01 to 0-l wt% of Ho jc The observed variation of the relative intensities of various fluores-_ cence lines with concentration indicate the Presence of more than one Ho3+ site in CaF2. This has been further substantiated by the observation of three different fluorescent decay times. The increase in the fluorescent decay times with concentration above 373 K is explained as probably being due to reabsorption of fluorescence radiation.