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Optical Spectroscopy of Cerium doped Potassium Lead Chloride for Potential Use in Scintillators

Undergraduate #102
Discipline: Physics
Subcategory: Physics (not Nanoscience)

Amber C. Simmons - Hampton University
Co-Author(s): Ei Ei Brown and Uwe Hömmerich, Hampton University, Hampton, VA Sudhir B. Trivedi, Brimrose Corporation of America, Sparks Glencoe, MD



Scintillator research has attracted enormous interest over the last decade for a wide range of applications such as monitoring nuclear materials, X-ray imaging screens, high-energy particle physics experiments, industrial inspections, and gas exploration. A number of rare earth activated halide scintillators have been developed and exhibit the most promising scintillation materials. Potassium lead chloride (KPb2Cl5) materials have recently emerged as new non-hygroscopic laser hosts with low maximum phonon energies (~203 cm-1), which lead to small non-radiative decay rates for trivalent rare earth dopants. In this work, the material purification, crystal growth, and spectroscopic properties of Ce3+ doped KPb2Cl5 (KPC) were investigated for possible applications radiation detectors. Under Xenon flash lamp excitation, preliminary spectroscopic results showed allowed 5d-4f Ce3+ emission centered ~385 nm in Ce3+ doped KPC. Luminescence properties of different Ce3+ concentration in KPC will also be discussed. In addition, commercial Ce: YAG (yttrium aluminum garnet, Y3Al5O12) and Ce: YAP (yttrium aluminum perovskite, YAlO3) crystals are included in this study for comparison. Detailed spectroscopic results including time-resolved excitation and emission as well as radioluminescence measurements of the investigated crystals will be presented at the conference.

Funder Acknowledgement(s): This work was supported by the National Science Foundation through grants HRD-1401077 and HRD-1137747.

Faculty Advisor: Ei Ei Brown,

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This material is based upon work supported by the National Science Foundation (NSF) under Grant No. DUE-1930047. Any opinions, findings, interpretations, conclusions or recommendations expressed in this material are those of its authors and do not represent the views of the AAAS Board of Directors, the Council of AAAS, AAAS’ membership or the National Science Foundation.

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