Equivalent dose estimation of polymineral fine grains using improved single-aliquot regenerative-dose protocol

A new single-aliquot regenerative-dose protocol is used to estimate the equivalent dose (De) in polymineral fine grains extracted from Holocene loess in Guanzhong, Shaanxi, in which three signals, blue-stimulated, post-IR blue stimulated and IR stimulated luminescence, are measured. In this approach, each natural or regenerated dose OSL is corrected for changes in sensitivity using the OSL response to a constant test dose (10%-20% of De). Among these three luminescence signals, post-IR blue stimulated luminescence provides reliable estimates of De. It is concluded that prior-IR exposure may dispel the trapped electrons with lower energy, and post-IR blue simulated luminescence is mainly generated by the trapped electrons with higher energy