Potassium and ammonium dihydrogen phosphates activated with thallium: Growth and luminescence and scintillation properties
- National Academy of Sciences of Ukraine, Institute for Single Crystals (Ukraine)
The conditions for the growth of potassium dihydrogen phosphate (KDP) and ammonium dihydrogen phosphate (ADP) crystals with concentrations of the thallium activator in the initial solution of 0.01, 0.1, and 1.0 wt % are investigated. It is shown that the character of incorporation and distribution of thallium in the KDP and ADP lattices is limited, apparently, by the difference in the ionic radii of K{sup +}, NH{sub 4}{sup +}, and Tl{sup +} cations and the charge state of prismatic {l_brace}100{r_brace} and pyramidal {l_brace}101{r_brace} growth planes. Doping of KDP and ADP with thallium (to 0.1 and 1.0 wt %, respectively) does not deteriorate the structural quality of these crystals. The dependence of the lattice parameters a and c on the thallium impurity concentration is investigated. The absorption bands of thallium in the KDP:Tl{sup +} and ADP:Tl{sup +} crystals peak at 218 and 215 nm, respectively, while the photoluminescence band peaks at 280 nm for both types of crystals. The relative light yield upon excitation of scintillations by {alpha} particles (Pu{sup 239}) and {beta} particles (Bi{sup 207}) is measured.
- OSTI ID:
- 21091453
- Journal Information:
- Crystallography Reports, Vol. 51, Issue 4; Other Information: DOI: 10.1134/S1063774506040262; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
- Country of Publication:
- United States
- Language:
- English
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