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High Resolution Powder Reflectance Spectroscopy
Volume 23, Number 3 (June 1969) Page 235-239
It is possible to obtain resolution of the order of 1-2 Å in the reflectance spectroscopy of powders by carefully controlling the experimental measuring techniques. One can then identify; optically, broad bands and narrow bands of the rare earths as being upper energy states and unperturbed 4f transitions. It is even possible to show various degrees of perturbation of 4f energy-states of a given rare-earth ion by observing Stark states which may vary from 5-90 Å in half-width. However lack of polarization data make positive identification of these Stark states impossible.