Evaluation Of kinetic parameters Of Li(2)b(4)o(7):Mn single crystal
Makaleler > Tam Makale · 2014
Yazarlar: Elçin EKDAL KARALI, TURGAY KARALI, ANDRAS KELEMEN, V HOLOVEY, M IGNATOVYCH
JOURNAL OF ALLOYS AND COMPOUNDS, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2014, cilt 588, ss 413-417
DOI: 10.1016/j.jallcom.2013.11.086
Özet
The kinetic parameters of a newly developed Li2B4O7:Mn single crystal phosphor have been presented. Li2B4O7 single crystal doped with Mn were grown via the Czochralski method. Thermoluminescence (TL) glow curve of Li2B4O7:Mn single crystal exhibits two well separated TL peaks at about 363 and 478 K, later being more intense, with a heating rate of 1 K/s. The high-temperature glow curve at 478 K is important for dosimetric studies of Li2B4O7 (LBO) doped with Mn. The kinetic parameters (activation energy (E), frequency factor (s) and kinetic order (b)) of the main glow peak (478 K) have been calculated using initial rise (IR), isothermal decay (ID) and peak shape (PS) methods. Activation energies obtained by IR, ID and PS were found to be 1.24, 1.18 and 1.20 eV, respectively. Similarly, the frequency factors were determined using isothermal decay and peak shape methods and found as 7.85 x 10(11) and 3.27 x 10(11) s (1), respectively. All results obtained using these methods are compared and discussed. (C) 2013 Elsevier B. V. All rights reserved.