Investigation of OSL signals from very deep traps in unfired and fired quartz samples
Yükleniyor...
Dosyalar
Tarih
2010-03-15
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science BV
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This paper presents an attempt to isolate experimentally optically stimulated luminescence (OSL) signals which may originate from very deep traps (VDT) in quartz samples. As VDT we consider those traps which are responsible for TL glow peaks with a peak maximum temperature above a TL readout temperature of 500 C. The basic experimental procedure used to isolate OSL signals from VDT is heating the quartz samples to 500 C immediately before measuring the OSL signal. The study was carried out on eight quartz samples of very different origins; it is found that all eight samples exhibit OSL signals from VDT, and for a wide region of OSL stimulation temperatures. The OSL signal from VDT depends strongly on the type of quartz sample studied and on whether the sample was fired at high temperatures or not. The behavior of the OSL signal from VDT as a function of the stimulation temperature is found to be very different in fired and unfired samples. The thermal activation energy E for the OSL signals from VDT is obtained in both fired and unfired samples. The OSL signal from VDT in quartz samples fired at 800 C for 1 h is very high, and the OSL curves consist of three well-defined components and a fourth slow component which is rather poorly resolved. The dose response of these components is obtained using a computerized deconvolution procedure for the dose region 0.5-300 Gy. The results are of importance for dating of ancient fired ceramics, since OSL signals from VDT could potentially extend appreciably the equivalent dose region toward both lower and higher values.
Açıklama
Anahtar Kelimeler
Luminescence, Thermoluminescence (TL), Optically stimulated luminescence (OSL), Quartz, Dosimetry, Dating, Stimulated luminescence components, Synthetic quartz, Lm-osl, Temperature, Thermoluminescence, Dependence, Model, Superlinearity, Irradiation, Protocol, Activation energy, Dosimeters, Light emission, Oxide minerals, Deep traps, Different origins, Dose response, Equivalent dose, Experimental procedure, Glow peaks, High temperature, Optically stimulated luminescence, Peak maxima, Slow component, Thermal activation energies
Kaynak
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
268
Sayı
6
Künye
Kitis, G., Güneç Kıyak, N., Polymeris, G. S., & Pagonis, V. (2010). Investigation of OSL signals from very deep traps in unfired and fired quartz samples. Nuclear Inst.and Methods in Physics Research, B, 268(6), 592-598. doi:10.1016/j.nimb.2009.12.006
