Energy Relaxation in LSO and LGSO Crystals Studied in the VUV Range

The role of energy transfer from Gd3 + to Ce 3+ activator in the formation of the luminescence yield and kinetics of Lu 2x Gd 2-2x SiO 5 :Ce (LGSO) mixed crystals has been studied by VUV spectroscopy including temperature dependent time-resolved measurements of luminescence excitation and emission s...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2014-02, Vol.61 (1), p.290-292
Main Authors: Kamenskikh, Irina A., Belsky, Andrei N., Gektin, Alexander V., Limonova, Marina V., Neicheva, Svetlana, Sidletskiy, Oleg C.
Format: Article
Language:English
Subjects:
Absorption
Afterglow suppression
Afterglows
Cerium
Channels
Chemical Sciences
Crystals
Energy (nuclear)
Energy exchange
energy transfer
Engineering Sciences
Excitation
Kinetic theory
LGSO
Luminescence
Mixed crystals
Physics
Stations
Temperature measurement
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Summary:The role of energy transfer from Gd3 + to Ce 3+ activator in the formation of the luminescence yield and kinetics of Lu 2x Gd 2-2x SiO 5 :Ce (LGSO) mixed crystals has been studied by VUV spectroscopy including temperature dependent time-resolved measurements of luminescence excitation and emission spectra and luminescence kinetics in the excitation energy range 4 to 25 eV at the SUPERLUMI station of HASYLAB, DESY. Improved scintillation yield as well as suppressed afterglow that can be achieved by appropriate choice of Lu/Gd ratio as well as of Ce-concentration were suggested to result from an additional channel of energy relaxation via Gd-states, which appears in LGSO. The role of Ca-codoping is discussed.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2013.2278341