PROPERTIES OF EXCITON STATES IN NAI .2. EXCITONIC ENERGY TRANSFER TO Q AND TL CENTERS

被引：24

作者：

BLUME, H

FONTANA, MP

VANSCIVE.WJ

机构：

[1] Department of Physics, Lehigh University, Bethlehem, Pennsylvania

[2] Cornell University, Ithaca, New York

来源：

PHYSICA STATUS SOLIDI | 1969年 / 31卷 / 01期

关键词：

D O I：

10.1002/pssb.19690310116

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

As reported in Part I, upon excitation in the region of the first excition absorption band the efficiency of the intrinsic luminescence of NaI decreases with decreasing temperature below 60 °K. This part of our article yields information about the fate of the excition generated at low temperatures: 1. Only a very small fraction of the excitons contribute to thermoluminescence. 2. The exciton state is not the excited state of an emission with a small Stokes shift ΔE ≧ 0.1 eV. 3. However, an excitonic energy transfer to Q and Tl centers takes place. The lifetime of the exciton state in a crystal doped with 1 ppm of each Q and Tl centers is τ < 5 ns at LHeT. Copyright © 1969 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：133 / &