Low temperature thermoluminescence of Gd2O3 nanoparticles using various heating rate and T-max - T-exc. methods

Delice, Serdar
Hasanlı, Nızamı
Thermoluminescence (FL) measurements for Gd2O3 nanoparticles were carried out for various heating rates between 0.3 and 0.8 K/s at low temperatures (10-280 K). TL spectrum exhibited two observable and one faint peaks in the temperature region of 10-100 K, and four peaks in the temperature region of 160-280 K. Heating rate analysis was achieved to understand the behaviors of trap levels. It was seen that the peak maximum temperatures and TL intensities of all peaks increase with increasing heating rate. This behavior was ascribed to anomalous heating rate effect. T-max - T(exc )analysis was accomplished for TL, peaks at relatively higher temperature region to reveal the related traps depths. T-max - T-exc plot presented a staircase structure indicating that the TL glow curve is composed of well separated glow peaks. Mean activation energies of trapping centers corresponding to these separated peaks were found as 0.43, 0.50, 0.58 and 0.80 eV.


Trap distribution in TlInS2 layered crystals from thermally stimulated current measurements
IŞIK, MEHMET; Goksen, K.; Hasanlı, Nızamı; Ozkan, H. (Korean Physical Society, 2008-02-01)
We have carried out thermally stimulated current (TSC) measurements with the current flowing along the layer on as-grown TlInS2 layered single crystals in the low temperature range 10 - 110 K with different heating rates of 0.1 - 1.5 K/s. Experimental evidence was found for the presence of two shallow electron trapping centers with activation energies of 12 and 14 meV. Their capture cross sections have been determined as 2.2 x 10(-23) and 7.1 x 10(-25) cm(2), respectively. It was concluded that retrapping i...
Trapping center parameters and optical absorption in. quaternary TI4In3GaS8, Tl4InGa3Se8,and Tl2InGaS4 semiconductors
Hasanlı, Nızamı (Korean Physical Society, 2007-04-01)
We have carried out thermally stimulated current measurements on as-grown Tl(4)ln(3)GaS(8), Tl4InGa3Se8, and Tl2InGaS4 crystals in the low-temperature ranges of 10 - 90, 10 - 160, and 10 - 60 K, respectively. Using the different heating rates method, we revealed experimental evidence for trapping centers with activation energies of 12 meV (Tl4In3GaS8), 17 meV (Tl(4)lnGa(3)Se(8)), and 10 meV (Tl(2)lnGaS(4)). The capture cross sections of the traps were found to be 3.0 x 10(-25), 2.0 x 10(-26), and 1.3 x 10(-...
Trapping center parameters in TlInS2 layered crystals by thermally stimulated current measurements
Yuksek, NS; Hasanlı, Nızamı; Ozkan, H; Karci, O (Institute of Physics, Polish Academy of Sciences, 2004-07-01)
Thermally stimulated current measurements are carried out on TlInS2 layered single crystal with the current flowing perpendicular to the c-axis in the temperature range of 10 to 90 K. The results are analyzed according to various methods, such as curve fitting, heating rate, and initial rise methods, which seem to be in good agreement with each other. Experimental evidence is found for one trapping center in TlInS2 crystal in the low-temperature region.
Analysis of Thermoluminescence Glow Peaks in beta-Irradiated TlGaSeS Crystals
IŞIK, MEHMET; YILDIRIM, TACETTİN; Gasanly, N. M. (Institute of Physics, Polish Academy of Sciences, 2016-06-01)
Thermoluminescence properties of TlGaSeS layered single crystals were investigated in the temperature range of 280-720 K. Thermoluminescence glow curve exhibited three peaks with maximum temperatures of approximate to 370, 437, and 490 K. Curve fitting, initial rise and peak shape methods were used to determine the activation energies of the trapping centers. All applied methods resulted with energies around 0.82, 0.91, and 0.99 eV. Dose dependence of the thermoluminescence intensity was also examined for t...
Generation of 2-mu J 410-fs pulses from a single-mode chirped-pulse fiber laser operating at 1550 nm
Pavlova, Svitlana; Rezaei, Hossein; Pavlov, Ihor; Kalaycioglu, Hamit; Ilday, Fatih Omer (Springer Science and Business Media LLC, 2018-10-01)
We report on a simple, robust, femtosecond chirped-pulse-amplification system, based on Er-and Er-Yb-doped fibers, operating at a central wavelength of 1555 nm. The entire system is constructed from commercially available fiber components, except the grating compressor, for easy duplication by other researchers. The laser system produces chirped pulses with up to 4 mu J of pulse energy at 250 kHz. After dechirping, the pulse duration is 410 fs and the pulse energy is reduced to 2 mu J. The repetition rate o...
Citation Formats
S. Delice, M. IŞIK, and N. Hasanlı, “Low temperature thermoluminescence of Gd2O3 nanoparticles using various heating rate and T-max - T-exc. methods,” RESULTS IN PHYSICS, pp. 1809–1813, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44089.