Luminescence of KCl single crystals doped with Ge atoms
Jun-Gill Kang; So-Kyung Ju; Seoung-Won Lee; Youn-Doo Kim; Jun-Gill Kang; Dept. of Chem., Chungnam Nat. Univ., Daejon, South Korea; So-Kyung Ju; Dept. of Chem., Chungnam Nat. Univ., Daejon, South Korea; Seoung-Won Lee; Dept. of Chem., Chungnam Nat. Univ., Daejon, South Korea; Youn-Doo Kim; Dept. of Chem., Chungnam Nat. Univ., Daejon, South Korea
Журнал:
Journal of Physics: Condensed Matter
Дата:
1995-09-11
Аннотация:
The emission from KCl:Ge<sup>0</sup> excited in the W range was measured as a function of the exciting photon energy and temperature. The polarized emission spectrum and the angular dependence of polarization ratio were also investigated. Like KCl:Bi<sup>3+</sup>, KCl:Ge<sup>0</sup> single crystals produce two emission bands peaking at 345 and 395 nm. The interstitial Cl<sup>-</sup> ion is assumed to be responsible for the colour centre of the 345 and 395 nm emissions. The definitive assignment of these bands is presented in terms of the adiabatic potential energy surface, in which the Jahn-Teller effect is taken into account.
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