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Variations énergétiques de l’absorption optique du lanthane et du praséodyme pris en couches minces

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Abstract

Under static ultrahigh vacuum (10−9 torr), we have studied the optical properties of lanthanum and praseodymium thin films. It is shown that these films behave similarly in the 2000–8000 Å spectral range. Results are identical for other light rare-earth thin films. We suggest that indirect transitions are responsible for the presence of a maximum in the optical absorption near 5,8 eV.

© 1974 Optical Society of America

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