Evidence of transient species occurring in the reduction process of trivalent lanthanides under 2.5 MeV electron irradiation by in situ cathodoluminescence and time-resolved photoluminescence
- Laboratoire des Solides Irradies Ecole Polytechnique, CEA/DSM CNRS, 91128 Palaiseau (France)
In situ cathodoluminescence and time-resolved photoluminescence measurements were carried out on Sm-doped glasses during a 2.5 MeV electron irradiation. These experiments allow characterizing more precisely the mechanisms operating under irradiation and more specifically the reduction processes of Sm{sup 3+} to Sm{sup 2+} ions. Sm{sup 2+} emission lines appear in the first steps of the irradiation, however, the {sup 5}D{sub 0}->{sup 7}F{sub 0-2} emission lines of Sm{sup 2+} were not observed on the cathodoluminescence spectrum. Moreover, two sites of Sm{sup 2+} have been evidenced in the glasses; the formation of each species is clearly different. Relaxation processes of Sm{sup 3+} and Sm{sup 2+} leads to consider the existence of different transient states of Sm{sup 3+} and Sm{sup 2+} species which are annealed after irradiation. We propose some synthetic schemes of the reduction mechanisms produced during the irradiation.
- OSTI ID:
- 21352224
- Journal Information:
- Journal of Applied Physics, Vol. 105, Issue 11; Other Information: DOI: 10.1063/1.3125513; (c) 2009 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANNEALING
BOROSILICATE GLASS
CATHODOLUMINESCENCE
DOPED MATERIALS
ELECTRON BEAMS
PHOTOLUMINESCENCE
RARE EARTHS
SAMARIUM COMPOUNDS
SAMARIUM IONS
TIME RESOLUTION
BEAMS
CHARGED PARTICLES
ELEMENTS
EMISSION
GLASS
HEAT TREATMENTS
IONS
LEPTON BEAMS
LUMINESCENCE
MATERIALS
METALS
PARTICLE BEAMS
PHOTON EMISSION
RARE EARTH COMPOUNDS
RESOLUTION
TIMING PROPERTIES