title: Consequences of Ca Codoping in YAlO3:Ce Single Crystals.
abstract: The influence of Ca codoping on the optical absorption, photo-, radio-, and thermo-luminescence properties of YAlO3:Ce (YAP:Ce) crystals has been studied for four different calcium concentrations ranging from 0 to 500 ppm. Ca codoping results in a partial oxidation of Ce3+into Ce4+, The luminescence time response under pulsed X-ray excitation of the Ce3+/Ce4+admixure clearly demonstrates the role of hole migration on both the rise time and the generally observed slow components. From an application point of view, Ca codoping significantly improves the timing performances, but the induced presence of Ce4+ions is also the cause of a reduction in scintillation efficiency.
authors.affiliation: Institut Lumière Matière, UMR55306 Université Claude Bernard Lyon 1-CNRS, Bâtiment Kastler, 10 rue Ada Byron, 69622, Villeurbanne CEDEX, France.|Present address: Department of Materials Science, University of Milano-Bicocca, Italy.
authors.forename: Federico
authors.initials: F
authors.lastname: Moretti
authors.affiliation: Institute for Physical Research, National Academy of Sciences, 0203, Ashtarak, Armenia.
authors.forename: Karine
authors.initials: K
authors.lastname: Hovhannesyan
authors.affiliation: Institute for Physical Research, National Academy of Sciences, 0203, Ashtarak, Armenia.
authors.forename: Marina
authors.initials: M
authors.lastname: Derdzyan
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron road, Berkeley, CA, 94720, USA.
authors.forename: Gregory A
authors.initials: GA
authors.lastname: Bizarri
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron road, Berkeley, CA, 94720, USA.
authors.forename: Edith D
authors.initials: ED
authors.lastname: Bourret
authors.affiliation: Institute for Physical Research, National Academy of Sciences, 0203, Ashtarak, Armenia.
authors.forename: Ashot G
authors.initials: AG
authors.lastname: Petrosyan
authors.affiliation: Institut Lumière Matière, UMR55306 Université Claude Bernard Lyon 1-CNRS, Bâtiment Kastler, 10 rue Ada Byron, 69622, Villeurbanne CEDEX, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Dujardin
keywords: Ca codoping; cerium; energy transfer; scintillator; yttrium aluminium perovskite