Energy values are derived for several levels of the <sup>3</sup><i>H</i><sub>4</sub> and <sup>3</sup><i>H</i><sub>5</sub> Stark manifolds of the Pr<sup>3+</sup> ion in LaCl<sub>3</sub> and LaBr<sub>3</sub> not previously assigned.
© 1979 Optical Society of America
Jay S. Chivian, N. J. Krasutsky, and W. E. Case, "Infrared absorption of Pr3+ in LaCI3 and LaBr3 at 4–5µm," J. Opt. Soc. Am. 69, 1622-1623 (1979)