Luminescence characteristics of Sr4Al14O25:Eu,Dy under proton irradiation

✍ Scribed by K. Toh; S. Nagata; B. Tsuchiya; T. Shikama

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 285 KB
• Volume: 249
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2006.03.054

✦ Synopsis

Fluorescence and long lasting emission properties of Sr 4 Al 14 O 25 :Eu, Dy were examined under proton irradiation by varying incident energy. The fluorescence spectra have three strong peaks at 400, 480 and 570 nm. The first two peaks are attributed to the luminescence of Eu 2+ and exhibit the long lasting property. The peak at 570 nm is attributed to the luminescence of Dy 3+ ; it exhibits no luminescence after the irradiation has been stopped. The fluorescence intensity ratio of Eu 2+ /Dy 3+ exhibits incident energy dependence, and its value increases with an increase in the proton energy. Radiation damages also exhibits incident energy dependence. Therefore, Sr 4 Al 14 O 25 :Eu, Dy exhibits a potential of being employed to identify the incident proton energy. Long lasting emission has some decay time components and the longest one is unaltered by proton energy.