Abstract
A study about the aggregation-precipitation processes of divalent europium ions in mixed potassium halides (Cl/Br) has been carried out. Quenched samples lead to a single emission band at 418 nm, which compared with the emission observed in the corresponding europium doped non-mixed alkali halide crystals, appears perturbed by the presence of Cl or Br ions. This band has been ascribed to free europium-vacancy complexes. The annealing at 353 K produces an emission band composed of several contributions: (1) free dipoles, (2) an emission that might be attributed to a Suzuki type mixed phase containing chloride as well as bromide ions and (3) a band due to a metastable mixed phase peaking at around 450 nm. On the other hand, the annealing at 473 K induces metastable phases of the dihalide type emitting at 430, 448 and 474 nm. The intensity of these bands changes as a function of the content of halogen ions.
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.
