Weak magnetic field enhancement of the luminescence from F centre pairs in alkali halides

F-CENTER ELECTRON QUANTIZATION IN ALKALI HALIDE CRYSTALS Background Alkali halides and alkaline earth halides are strongly ionic compounds

Alkali halides and alkaline earth halides are strongly ionic compounds that solidify as crystals. The name for the alkali elements (Li, Na, K, Rb and Cs) comes from the Arabic word alqili (ashes of the salt-wort plant that was once used as a source of sodium and potassium for making glass from sand). The name for the halogen elements (F, Cl, Br, I—and the rare radioactive element astatine) come...

the role of russia in transmission of energy from central asia and caucuses to european union

پس ازفروپاشی شوروی،رشد منابع نفت و گاز، آسیای میانه و قفقاز را در یک بازی ژئوپلتیکی انرژی قرار داده است. با در نظر گرفتن این منابع هیدروکربنی، این منطقه به یک میدانجنگ و رقابت تجاری برای بازی های ژئوپلتیکی قدرت های بزرگ جهانی تبدیل شده است. روسیه منطقه را به عنوان حیات خلوت خود تلقی نموده و علاقمند به حفظ حضورش می باشد تا همانند گذشته گاز طبیعی را به وسیله خط لوله مرکزی دریافت و به عنوان یک واس...

Frenkel Defects in Alkali Halides

Detailed Study of the Electron-phonon Interaction in Alkali Halides” Part Ii Transmission Secondary Emission from Alkali Halides

The phenomenon of secondary emission from alkali halides is studied in transmission. This allows the variation of one more parameter (thickness) than in conventional reflection studies. An empirical method based on published results of scattering by thin foils is used to determine the spatial dependence of the internal electron excitation function. The results of the Monte Carlo calculations pr...

Magneto-optical properties of the excited state of F centres in some alkali-halides

The orbital g-factor and the spin-orbit splittings of the first excited state of F-centres are measured in NaCl, NaBr, KBr and KF crystals by observing absorption and magnetic circular dichroism at various temperatures and using the moments method. Our experimental results and others are compared with Harker’s theoretical values. LE JOURNAL DE PHYSIQUE TOME 38, OCTOBRE 1977, Classification Phys...