INVESTIGATION OF THE X-RAY STORAGE PHOSPHORS CS2NAYF6-PR3+ OR CE3+

We present Cs2NaYF6:Ce3+ or Pr3+ as new x-ray storage phosphors. The r adiation damage centers upon x irradiation were investigated using mag neto-optical and magnetic resonance spectroscopy. F centers are the ph otostimulable electron trap centers. For the activator Pr3+ it could b e shown that upon room temperature x irradiation only F centers and Pr 4+ hole trap centers are involved in the information storage and reado ut process. There are indications that the process is the same for Ce3 +-doped Cs2NaYF6. (C) 1997 American Institute of Physics. [S0021-8979( 97)04221-7].