OSL from BeO ceramics: New observations from an old material

Date

1998-01-01

Author

Bulur, Enver

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

182
views

0
downloads

In BeO ceramics, exposed to ionizing radiation, an intense OSL signal was observed. The properties of the signal and its behavior under various experimental conditions were investigated. It was found that the OSL signal is a composite signal and exhibits strong thermal quenching. The quenching energy was estimated as similar to 0.5 eV. The excitation spectrum of the OSL signal was obtained as a broad peak in the region 420-550 nm with maximum around 435 nm. The possible correlation between the OSL signal and the peaks in the TL glow curve was also examined. It was interesting to observe that the highly light sensitive TL peak near 220 degrees C does not contribute to the OSL signal. The OSL signal was found to originate from a trap near 340 degrees C. To check the possibility of using the material for radiation dosimetry the dose response and thermal stability of the OSL signal were also investigated. The dose response was found to be guile linear up to similar to 10 Gy. The thermal activation energy of the OSL trap was determined as similar to 1.7 eV using isothermal annealing and heating rate methods thus proving the suitability for dosimetry.

Subject Keywords

Optically stimulated luminescence, Temperature-dependence, Alpha-Al2o3-C, Dosimetry, Quartz, TL

URI

https://hdl.handle.net/11511/41937

Journal

Radiation Measurements

DOI

https://doi.org/10.1016/s1350-4487(98)00084-5

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Infrared (IR) stimulated luminescence from α - Al2O3:C Bulur, Enver; WAHL, W (1998-01-01) Infrared (IR) stimulated luminescence from αAl2O3:C single crystals was investigated. The data show that the IR-stimulated luminescence curve contains at least two overlapping signals. One of the components was found to be both thermally and optically unstable whereas the second component was thermally stable and slowly decaying under constant stimulation. The slow decaying component was found to be very sensitive to radiation dose. It was found that doses smaller than 1 mGy could be measured and the lumin...
Photo-transferred luminescence from BeO ceramics Bulur, Enver (2007-03-01) Temperature and radiation dose dependences of the thermoluminescence, photo-transferred luminescence signals from BeO ceramics were investigated using blue-green stimulation (420-550 nm). Several deep traps that act as sources for the photo-transferred luminescence signals, located in 400-625 degrees C region of the TL glow curve, were distinguished.
Infrared (IR) stimulated luminescence from feldspars with linearly increasing excitation light intensity Bulur, Enver (1999-01-01) IR stimulated luminescence signal from potassium and sodium feldspars were studied by linearly increasing the excitation power from zero to a maximum value during the readout. The peak shaped signals observed in both feldspars could be approximated using a linear combination of three first-order components as deduced by curve fitting. The thermal and radiation dose dependent behavior of the IR-stimulated OSL curves were also studied. (C) 1999 Elsevier Science Ltd. All rights reserved.
Non-contact atomic force microscope (ncafm) operation in uhv using radiation pressure excitation of cantilever Uysallı, Yiğit; Turan, Raşit; Yerci, Selçuk; Department of Physics (2016) In this work a new method for excitation of Non-Contact Atomic Force Microscope (NCAFM) cantilevers by means of radiation pressure was developed and applied for NCAFM imaging for the first time in the world. Piezo excitation is the most common method of cantilever excitation in AFM devices. However, it has few drawbacks, sometimes spurious resonance peaks and non-ideal Lorentzian curves can be observed. Radiation pressure has earlier been used for calibration of AFM cantilevers but has never been used for i...
Use of the LM-OSL technique for the detection of partial bleaching in quartz Agersnap Larsen, N.; Bulur, Enver; Bøtter-Jensen, L.; McKeever, S.W.S. (2000-12-15) We present a study of the sensitivity to light (ease-of-bleaching) of the trapped charge in sedimentary quartz grains using an optically stimulated luminescence (OSL) technique in which the intensity of the stimulation light is linearly increased during the measurement period. The technique is known as linear modulation OSL (LM-OSL). In controlled laboratory conditions, this technique has been employed to study the ease-of-bleaching of the trapped charge in quartz by comparing the OSL curves of quartz aliqu...

Citation Formats

E. Bulur, “OSL from BeO ceramics: New observations from an old material,” Radiation Measurements, pp. 639–650, 1998, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41937.