Optical Measurement of the Plasma Frequency andM2,3Band of Chromium

Abstract

The transmission of thin chromium films has been measured in the extreme vacuum ultraviolet. The onset of transmission at 500 angstroms or 24.8 electron volts agrees well with the theoretical prediction by Pines of 25 electron volts; it also agrees well with the experimental electron eigenlosses measured by Watanabe, and Marton and Leder, of 26 electron volts and 22 electron volts, respectively. The $M_{2,3}$ band was also measured.