The Luminescence of CdWO4:Tb,Li Crystals under Synchrotron Excitation at 10 K
S.S. Novosada, L.V. Kostyka, I.S. Novosada, A.P. Luchechkoa, and G.B. Stryganyukb
aIvan Franko National University of Lviv, Universytetska 1, 79000 Lviv, Ukraine
bInstitute for Scintillation Materials, National Academy of Sciences of Ukraine, Lenin Ave. 60, 61000 Kharkov, Ukraine
Received: February 17, 2012
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The luminescent properties of CdWO4:Tb,Li crystals have been investigated at 10 K in the region 4-25 eV using synchrotron excitation. It is shown that besides the intrinsic matrix luminescence the number emission lines due to electron f-f-transitions in Tb3+ ions are efficiently excited at near-edge region of the fundamental absorption (Eexc = 4.1 eV). The weak recombination luminescence of terbium impurity on the background of intensive matrix luminescence is observed under excitation in the region of fundamental absorption (Eexc = 5.4 and 13.8 eV). It is shown that the luminescence spectrum of the matrix is a superposition of three elementary bands 2.07, 2.47, and 2.73 eV. The nature of emission bands is discussed.
DOI: 10.12693/APhysPolA.122.717
PACS numbers: 78.55.-m