Introduction of Marinelli effective solid angles for correcting the calibration of NaI(Tl) field gamma-ray spectrometry in TL/OSL dating

摘要

A study is made of the corrections that are needed in the evaluation of the annual radiation dose, for use in TL/OSL-dating, via NaI(Tl) field gamma-ray spectrometry (monitoring of K, Th and U), calibrated via voluminous blocks that are simulating the Auger hole measuring conditions. Two cases are considered: the "Heidelberg" granite calibration block, which was found to be "quasi-infinite", and the "Oxford" concrete calibration blocks, for which "effective" concentrations of elements are reported so as to account for their "non-infiniteness". The calculations, via the software package ANGLE, are based on the concept of effective solid angles for Marinelli geometries.