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- W1997372271 abstract "The absorption and emission properties of F2+ centers in KCl (two adjacent anion vacancies which bind one electron) were investigated between 0.6 and 5 eV using an optically aligned center system. Energy positions, level degeneracies, polarization behavior and oscillator strengths of 8 absorption transitions were found in close agreement to the calculated states of the H2+ molecular ion corrected for a single dielectric constant and the proper separation between the two effective positive charges. Excitation of the lowest 2pδu state at 1.38 μm leads with temperature independent quantum efficiency to a Stokes shifted emission at 1.67 μm almost in mirror symmetry with the zero phonon line at 1.5260 μm. Excitation of all higher absorption transitions (2pπu, etc.) at liquid helium temperature (LHeT) produces a visible luminescence at 600 nm. At higher temperature a thermally activated process (activation energy ΔE = 0.063 eV) transfers the excitation energy to the lowest excited state 2pδu quenching the 600 nm luminescence and producing the IR emission." @default.
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- W1997372271 date "1970-01-01" @default.
- W1997372271 modified "2023-10-18" @default.
- W1997372271 title "Optical properties of an electron bound to a double well potential in a dielectric" @default.
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- W1997372271 doi "https://doi.org/10.1016/0022-2313(70)90075-x" @default.
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