Mechanism
of the experimentally observed anomalous shift of a thermoluminescence (TL)
glow peak that varied with irradiation dose is yet to be fully established. A
theory that the anomalous peak must have contained more than one first order
composite peak each with different TL dose characteristics has been one major
explanation proposed to explain this observation. This work was undertaken to
simulate the anomalous glow peak by using a modified version of a previously
proposed model and numerically solving sets of simultaneous differential
equations governing the stages of TL phenomena (excitation, relaxation and
heating). In the modified model, two additional electron trapping centers were
incorporated in order to simulate accurately this glow curve. Computerized curve deconvolution (CGCD) analyses was carried
out on the simulated glow peak in
attempt to retrieve back the electron trapping center energies and to identify
their respective peak positions. The outcome of this confirmed the peak to be
possibly composite in nature comprising three overlapping glow peaks at 288,
300 and 317oC with respective energy gaps of 1.70, 1.73 and 1.75eV. It
is therefore further substantiated that this kind of temperature shift of peak
with dose resulting from composite glow peaks is possible.
simulation anomalous glow peak quartz GCD analyses thermoluminesence
Birincil Dil | İngilizce |
---|---|
Konular | Radyobiyoloji |
Bölüm | Articles |
Yazarlar | |
Yayımlanma Tarihi | |
Gönderilme Tarihi | 29 Nisan 2018 |
Yayımlandığı Sayı | Yıl 2017Cilt: 4 Sayı: 2 |