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Luminescence at 400 and 440nm in sanidine feldspar from original and X-ray-induced defects

AutorSánchez Muñoz, Luis; Correcher, Virgilio; García-Guinea, Javier ; Delgado Peris, Antonio
Palabras claveThermoluminescence
Radiation-induced defects
Fecha de publicación19-sep-2006
CitaciónNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 580(1): 679–682. Proceedings of the 10 th International Symposium on Radiation Physics — ISRP 10 Coimbra, Portugal, September 17–22, 2006
ResumenThe blue luminescence of feldspar crystals with molecular composition Ab38Or60An2 and high-sanidine X-ray diffraction pattern from Miocene rhyolite ash tuffs of the Twin Falls Volcanic Field (Idaho, USA) has been studied by high sensitivity thermoluminescence (TL) up to 400 1C at 2.5 1C/s and radioluminescence (RL) at room temperature. The natural thermally stimulated blue luminescence is composed by a single emission at 400nm at T4200 1C probably linked to defect centres at original chemical impurities. The 50 Gy X-ray-induced TL emission exhibits a very symmetric broad band centred at 440nm and 200 1C, attributed to unstable radiation-induced defects. The RL spectrum displays these two signals which can be explained since irradiation induces charge carriers, and subsequent electron-hole recombinations, in addition to optically active defect centres. The 400nm band seems to be useful for dose reconstruction purposes.
Descripción4 páginas y 3 figuras
Versión del editorhttp://dx.doi.org/10.1016/j.nima.2007.05.121
Identificadoresdoi: 10.1016/j.nima.2007.05.121
Aparece en las colecciones: (MNCN) Comunicaciones congresos
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