摘要
本文报导了BaFBr:EU^(8+)晶体中的新型色心,即F_2,F_3和F_4心.F_3、F_3和F_4的吸收带分别位于670—715nm,810—900nm和970—995nm.它们是由F心的凝聚作用而形成的缔合中心.由于这些色心比F心稳定,且它们的吸收带偏离Eu^(3+)的发射波长(390nm)更远,故更适合于BaFBr:Eu^(2+)光激励发光的研究和开发。
New color centers,F2,F3 and F4 in BaFBr:Eu2+ crystal are reported in this paper. Their absorption bands are in 810-900nm 670-715nm, and 970-995nm respectively.They are F aggregates formed by the association of F centers. According to the present study,F2, F3 and F4 centers are more stable than F centers and the deviation of stimulation bands from the emission band of Eu2 + is farther than that of F bands from the emission band of Eu2 + . Therefore F2, F3 and F4 centers are more efficient for X-ray storage.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1993年第2期119-123,共5页
Chinese Journal of Luminescence
基金
国家自然科学基金
关键词
光激励发光
色心
溴氟化钡
发光
BaFBr:Eu2+
photostimulated luminescence
color centers
