Abstract
It is shown that, under certain conditions, measurements on the emission and absorption of luminescent centers allow the determination of the configurational coordinate curves for the ground and excited states of the centers. The method is used as a first approximation in obtaining configurational coordinate curves for divalent manganese in zinc silicate. These curves offer an explanation of the asymmetry of the manganese emission. Comparison of the energy levels for the manganese ion in the solid and gaseous state leads to an identification of the various levels and to the suggestion that emission in the solid state corresponds to a 4G→6S transition.
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