Structure and luminescence of CsI:Eu columnar films |
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| Authors: | A M Lebedynskiy N V Shiran A V Gektin A G Fedorov S A Vasyukov P V Mateychenko |
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| Institution: | 1.Institute of Scintillation Materials, National Academy of Sciences of Ukraine,Kharkov,Ukraine;2.Institute of Single Crystals, National Academy of Sciences of Ukraine,Kharkov,Ukraine |
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| Abstract: | Europium doped columnar films of CsI are produced by vacuum condensation. Eu2+ ions in the CsI:Eu films lead to the formation of a narrow (0.18 eV), intense luminescence band with a maximum at 456 nm, which is excited by x-rays, as well as by photons of various energies. The spectral and kinetic characteristics of the emission depend on the amount of activator and on the conditions under which the film is prepared and stored. The nature of the luminescence centers is determined by structural formations that contain divalent europium ions. |
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