High sensitivity thermoluminescence spectrometer

Luff, B.J.; Townsend, Peter

doi:10.1088/0957-0233/4/1/011

Cited by 132 publications

(60 citation statements)

References 14 publications

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“…XEOL measurements were carried out in ~1 mbar vacuum by heating to 400°C at 10 K minusing the system reported by Luff and Townsend (1993). Samples were irradiated using a Philips MCN-101 X-ray tube at a dose rate of 1.8 Gy min -1 .…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Thermoluminescence of SrAl2O4:Eu2+, Dy3+: Kinetic analysis of a composite-peak

Chithambo

Wako

Finch

2017

Radiation Measurements

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The kinetic analysis of thermoluminescence of beta-irradiated SrAl 2 O 4 :Eu 2+ ,Dy 3+ is reported.The glow-curve is dominated by an apparently-single peak. It has been demonstrated using a number of tests including partial dynamic-heating, isothermal heating, phosphorescence and, the effect of fading, that the peak and the glow-curve consists of a set of closely-spaced peaks. In view of the peak being complex, its first few components were abstracted and analysed and for comparison, the peak was also analysed assuming it is genuinely single. In the latter, the order of kinetics is calculated to be intermediate between first and second-order and not first-order as predicted by qualitative tests such as the − or − procedures. A model based on density of energy states has been used to account for and reconcile the qualitative and quantitative results. The activation energy is found as ~1 eV, consistent with the value expected of Dy 2+ , the presumed electron trapping state of the Dy 3+ electron trap. The thermoluminescence is subject to thermal quenching with an activation energy of 0.520 ± 0.002 eV. The luminescence is ascribed to 5d→4f 7 Eu 2+ transitions whereas the thermal quenching is presumed to occur from an alternative level of the degenerate 5d energy level of the Eu 2+ cation.

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Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Thermoluminescence of SrAl2O4:Eu2+, Dy3+: Kinetic analysis of a composite-peak

Chithambo

Wako

Finch

2017

Radiation Measurements

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“…2) se observa un rápido incremento de la señal para cortos espacios de tiempo transcurridos en el calentamiento (hasta 1-20h), con posterioridad se tiende a un crecimiento asintótico. Este hecho puede ser debido a la auto-difusión de los iones alcalinos (K, Li, Na o Rb) a través de las interfases de la red donde quedan atrapados en centros [AlO 4 o . En las figuras 1a y 1b se aprecian algunas diferencias en la forma de las curvas debido a la naturaleza de la radiación de estimulación, radioluminiscencia por rayos X y catodoluminiscencia por haz de electrones.…”

Section: Resultados Y Discusiónunclassified

“…Para realizar las medidas espectrales de catodoluminiscencia (CL), termoluminiscencia (TL) y radioluminiscencia (RL) se utilizó el espectrómetro de la Universidad de Sussex [4]. El instrumental empleado permite obtener espectros resueltos en longitud de onda en un rango que abarca 200-800nm y que consta de dos sistemas de rendijas que desdoblan el espectro de emisión en dos regiones que se solapan a 200-40nm y 400-800nm.…”

Section: Materiales Y Métodosunclassified

Cambios en las propiedades luminiscentes de un feldespato potásico inducidos por efecto térmico y exposición a infrarrojo

Correcher¹,

García-Guinea²

2004

Bol. Soc. Esp. Ceram. Vidr.

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“…The optics of this spectrometer had been reported previously, 16 but significant improvements in detector efficiency and time resolution are now available. The wavelength dispersed spectra are corrected for the response of the overall spectrometer system.…”

Section: Methodsmentioning

confidence: 99%

Substrate lattice relaxations, spectral distortions, and nanoparticle inclusions of ion implanted zinc oxide

Wang

Zhang

et al. 2015

Journal of Applied Physics

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Low temperature radioluminescence and thermoluminescence spectra of ZnO track numerous changes produced by copper ion implantation into the surface layer. A significant, but unexpected, feature is that the bulk crystal becomes modified by the stress generated in the surface layer. This is reflected by the energy of intrinsic band gap emission. There are also differences in the spectra and peak temperatures of the thermoluminescence components, consistent with such a structural relaxation. The copper implant layer is both absorbing and reflective, so this introduces major distortions on the radioluminescence component from the bulk region, since the bulk luminescence signals are transmitted through, or reflected from, the implant layer. The temperature dependence of the spectra includes anomalies that are typical of changes driven by phase transitions of nanoparticle inclusions. Overall, the features of bulk relaxation, spectral distortion, and detection of nanoparticle inclusions are rarely considered for ion implanted luminescence studies, but the data suggest they are almost inevitable in a wide range of implanted materials.

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High sensitivity thermoluminescence spectrometer

Cited by 132 publications

References 14 publications

Thermoluminescence of SrAl2O4:Eu2+, Dy3+: Kinetic analysis of a composite-peak

Thermoluminescence of SrAl2O4:Eu2+, Dy3+: Kinetic analysis of a composite-peak

Cambios en las propiedades luminiscentes de un feldespato potásico inducidos por efecto térmico y exposición a infrarrojo

Substrate lattice relaxations, spectral distortions, and nanoparticle inclusions of ion implanted zinc oxide

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