Title :
Changes in half brightness dose due to preparation pressure for YAG:Ce
Author :
Hollerman, William A. ; Bergeron, Noah P. ; Womack, Frank N. ; Goedeke, Shawn M. ; Allison, Stephen W.
Author_Institution :
Dept. of Phys., Univ. of Louisiana, Lafayette, LA, USA
fDate :
6/1/2004 12:00:00 AM
Abstract :
Previous research shows that certain properties, such as half brightness dose (N12/) and fluorescence intensity, depend on preparation pressure. Phosphor tablets composed of 50% cellulose and 50% yttrium aluminum garnet doped with cerium (YAG:Ce) powders, were created using a Carver press with an applied force of 78 kN. The average 3-MeV proton N12/ for the tablet samples was 11.6 and 36.6 times smaller than equivalent values for the paint and crystal forms of YAG:Ce, respectively. It is quite apparent that the application of a large preparation force damages some of the YAG:Ce grains which reduces the N12/. The fluorescence efficiency of the tablets was also less than that measured for the other forms of YAG:Ce.
Keywords :
aluminium compounds; cerium; dosimetry; fluorescence; gamma-ray effects; phosphors; yttrium compounds; Carver press; YAG:Ce; YAG:Ce grains; YAl5O12:Ce; cellulose; cerium powders; crystal forms; fluorescence efficiency; fluorescence intensity; gamma irradiation; half brightness dose; paint forms; phosphor tablets; preparation pressure; tablet samples; yttrium aluminum garnet; Aluminum; Brightness; Cerium; Fluorescence; Garnets; Paints; Phosphors; Powders; Protons; Yttrium; Half brightness dose; YAG:Ce; fluorescence; phosphor; pressure;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2004.829661
