Magnetic resonance investigations of LaCl 3 :Ce 3+ scintillators |
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| Authors: | U Rogulis S Schweizer J-M Spaeth E V D Van P Dorenbos C W E Van Eijk |
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| Institution: | 1. Department of Physics , University of Paderborn , Paderborn , D-33095 , Germany;2. Interfaculty Reactor Institute , Delft University of Technology , Delft , 2629 JB , The Netherlands |
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| Abstract: | In undoped and Ce 3+ -doped LaCl 3 EPR has been detected in the X-ray luminescence (XL-EPR) in K-band (25 v GHz) at 1.5 v K. Two excited triplet states with different EPR parameters and spectral shapes could be separated, both triplet states have been attributed to "out-of-plane" self-trapped excitons (STE) in LaCl 3 . No EPR signals of V K centres (self-trapped holes) could be detected in undoped or Ce 3+ -doped LaCl 3 after X-irradiation at low temperatures. X-irradiation of undoped LaCl 3 creates also an EPR spectrum which can be tentatively attributed to F-type defects. The scintillation mechanism is discussed. |
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| Keywords: | Magnetic Resonance Self-trapped Excitons Lacl3:Ce3+ Scintillator |
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