Effects of annealing on TL sensitivity of granitic quartz

摘要

A TL sensitivity change can usually be observed after the quartz sample is heated to a high temperature. The change of 110 degrees C TL peak or PTTL was reported to be an increase in many studies. The change of TL sensitivity of other TL peaks, mainly 150 and 375 degrees C, with annealing treatments was demonstrated in this study. Two types of TL sensitivities in granitic quartz were found. One type is the low temperature TL sensitivity (< 250 degrees C) which increases with annealing time and temperature. Another type is the high temperature TL sensitivity (> 250 degrees C) which usually decreases after annealing. If the TL sensitivity is a measure of the population of associated TL traps, the trap population is a potential geochronometer to date a cooling age of a granite host. (C) 2000 Elsevier Science Ltd. All rights reserved. [References: 14]