Abstract
The optical spectroscopy of the 248 Cm 3+ ion diluted in the host crystal CsCdBr 3 has been investigated by laser selective excitation, excited state absorption, and fluorescence spectroscopy. Three distinct Cm 3+ sites were observed. The principal site was assigned to the symmetric dimer center and its electronic structure was studied in detail. Analysis of its spectra resulted in the assignment of 58 energy levels up to 40 300 cm −1. These measured levels were fitted to the parameters of an empirical Hamiltonian with an rms deviation of 27.3 cm −1. The lifetimes of the six fluorescing levels have been measured at liquid-helium temperatures. Weak blue 6I 7/2→ 8S 7/2 upconversion fluorescence was observed when pumping the blue–green 8S 7/2→ 6P 5/2 absorption transitions of the principal site. It is explained by a phonon-assisted energy transfer mechanism.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
