Open AccessEXPERIMENTAL STUDIES OF F3+ COLOR CENTERS IN LiF CRYSTAL
Author(s) -
Zheng Li,
Ruan Yong-feng,
Guo Shaozhang,
Wan Liangfeng,
Hao Li
Publication year - 1986
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.35.1148
Subject(s) - spectral line , liquid nitrogen , irradiation , materials science , fluorescence , crystal (programming language) , center (category theory) , atomic physics , optics , chemistry , physics , nuclear physics , crystallography , computer science , programming language , organic chemistry , astronomy
In this paper, we describe systematically some experimental results of the optical characters of the creaion of F3+ centers in LiF crystal by electron bombardment under different conditions. The relative density between F3+ and F2 centers are analysed from fluorescence spectra. The experimental results show that irradiation temperature plays an important role in the creation of F3+ and F2 centers and affects the relative density of F3+ and F2 centers. The main results are as follows: (1) Irradiation at liquid nitrogen temperature and then warming up to room temperature in the dark can create F3+ canters with high density, which can be seen from the fluoreseence spectra, as fluorescence of F3+ centers centered at 530 nm is much stronger than that of F2 center (670 nm) and fewer N centers and R centers are presented in absortion spectra. (2) From dynamic fluorescence spectra, it can be shown that in the samples irradiated at liquid nitrogen temperature, the density of F3+ centers increase rapidly when F2+ centers decays. But in the samples irradiated at room temperature the growth of F3+ and F2 centers are approximatly with the came rate. (3) We observd the band width and double pike structure of the fluorescence excitation spectra of F3+ and F2 centers.