A 2D imaging system for mapping luminescence-depth profiles for rock surface dating

Spatially resolved optically stimulated luminescence (OSL) offers a means for rapid assessment of dose distributions in retrospective dosimetry and geochronology. Until recently, OSL imaging systems have largely been restricted to measurements millimetre scale samples; this approach is not well suited applications where the physical process interest operates on centimetre (e.g., depth dependent trap eviction exposed rocks, sediment mixing soils, attenuation gamma radiation, etc.). Here we describe demonstrate Risø Luminescence Imager - an electron multiplying charge-coupled device (EMCCD) based system measuring infrared photoluminescence (IRPL) (IRSL) from samples. While these signals specifically arise feldspar, stimulation detection configuration may be modified suit other target materials/dosimeters. We characterise stability reproducibility through IRPL IRSL large (∼4 × 5 cm) heterogeneous rock sample, slice K-feldspar mineral. Finally, present examples suitable applications, including reconstruction luminescence-depth profiles images, decay curves. Measurement with high resolution using 2D expected improve our understanding emptying mechanisms (kinetics) rocks. This also opens new avenues development field instrumentation provides opportunity study feldspar relation its geochemistry.