Aspects of Infrared Radioluminescence dosimetry in K-feldspar

• Autorzy: Varma V. , Biswas R. H. , Singhvi A. K.
• Języki publikacji: EN

Abstrakty

EN

Infrared radioluminescence (IRRL) of K-feldspar, detected at peak wavelength of 865 nm, is emerging as a potential geochronometric tool. The present study explores and attempts to optimize the IRRL dating protocols and proposes a revised protocol for estimation of palaeodose. UV light (395 nm; 700 mW/cm2) bleach of 800 s was optimum to remove the trapped charges responsible for IRRL and, reduced the interference of radio-phosphorescence due to prior irradiations. Validation of the proposed protocol was carried out by dose recovery tests on mineral and sediment K-feldspar samples of different provenances. An overestimation in dose recovery was observed and was attribut-ed to difference in sensitivity of natural IRRL and regenerated IRRL. The sensitivity changes were significant and systematic and were documented by repeating bleach–IRRL cycles. Corrections for sensitivity changes between natural and regenerated IRRL, gave reliable results and, have now been included in the proposed dating protocol.

Słowa kluczowe

EN

infrared radioluminescence; radio-phosphorescence; bleaching of IRRL; sensitivity correction; K-feldspar; geochronology

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2013
• Tom: Vol. 40, no. 4
• Strony: 266--273
• Opis fizyczny: Bibliogr. 10 poz., wykr.

Twórcy

autor

Varma V.

• Geosciences Division, Physical Research Laboratory, Ahmedabad, India – 380009

autor

Biswas R. H.

• Geosciences Division, Physical Research Laboratory, Ahmedabad, India – 380009

autor

Singhvi A. K.

• Geosciences Division, Physical Research Laboratory, Ahmedabad, India – 380009

Bibliografia

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