Spatially resolved infrared radiofluorescence: single-grain K-feldspar dating using CCD imaging

Abstract. The success of luminescence dating as a chronological tool in Quaternary science builds upon innovative methodological approaches, providing new insights into past landscapes. Infrared radiofluorescence (IR-RF) on K-feldspar is such an method that was already introduced two decades ago. IR-RF promises considerable extended temporal range and simple measurement protocol, with more applications being published recently. To date, all have used multi-grain measurements. Herein, we take the next step by enabling measurements single grain level. Our contribution introduces spatially resolved infrared (SR IR-RF) K-feldspars intends to make SR broadly accessible geochronological tool. In first part article, detail equipment, CCD camera settings software needed perform analyse We use newly developed ImageJ macro process image data, identify emitting grains obtain single-grain signal curves. For subsequent analysis, apply statistical programming environment R package Luminescence. second test samples. One sample irradiated artificially; other received natural dose. artificially renders results indistinguishable from conventional photomultiplier tube. seems overestimate expected dose ca. 50 % average. However, it also shows lower component, resulting ages consistent same sample's quartz fraction. experiments revealed unstable background due our cameras' degenerated cooling system. Besides this technical issue specific system used, ready for application. provides guidance tools applied (dating) studies feldspars using radiofluorescence.