INTRINSIC CONVERSION EFFICIENCY OF X-RAYS TO LIGHT IN GD2O2S-TB3+ POWDER PHOSPHORS

Authors
MORLOTTI R NIKL M PIAZZA M BORAGNO C
Citation
R. Morlotti et al., INTRINSIC CONVERSION EFFICIENCY OF X-RAYS TO LIGHT IN GD2O2S-TB3+ POWDER PHOSPHORS, Journal of luminescence, 72-4, 1997, pp. 772-774
Citations number
6
Categorie Soggetti
Optics
Journal title
Journal of luminescence → ACNP
ISSN journal
00222313
Volume
72-4
Year of publication
1997
Pages
772 - 774
Database
ISI
SICI code
0022-2313(1997)72-4:<772:ICEOXT>2.0.ZU;2-9
Abstract
The intrinsic conversion efficiency (ICE) of X-rays to light of Gd2O2S :Tb3+ powder phosphor has been determined according to known methods. The values vary between 0.09 and 0.17 depending on the processing cond itions and Tb content. An inverse correlation between ICE values and t he decay times of the UV excited green luminescence has been observed. A model of the metastable and nonradiative centres competing with Tb3 + ions, decreasing the energy efficiency transfer and the luminescence yield, is provided.