OPTICAL ABSORPTION AND LUMINESCENCE OF IRRADIATED MGF2

被引:56
作者
FACEY, OE
SIBLEY, WA
机构
[1] Solid State Division, Oak Ridge National Laboratory, Oak Ridge
来源
PHYSICAL REVIEW | 1969年 / 186卷 / 03期
关键词
D O I
10.1103/PhysRev.186.926
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A study of the temperature and polarization dependence of the absorption and luminescence from electron and neutron-irradiated MgF2 crystals has been made. The absorption band at 260 nm is accepted as due to an F center, and excitation, when other centers are absent, produces an emission at about 430 nm. Two other absorption bands at 370 and 400 nm arise from different types of M centers, and our data suggest that these centers give rise to emission bands at 420 and 600 nm, respectively. Several narrow absorption lines are observed in both electron-and neutron-irradiated samples. From polarization studies and optical bleaching treatment, the lines at 387.2, 385.7, 384.5, 382.3, and 380.8 nm are identified as zero-phonon and phonon-assisted transitions of the defect responsible for the 370-nm band. A comparison is made between the vibrational energies associated with the phonon-assisted lines and the dispersion relationships calculated for MgF2. © 1969 The American Physical Society.
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页码:926 / &
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