As feldspar can be measured using the longer wavelengths of infrared IR stimulation, a broader range of emissions are available for measurement see Figure 4. The calculation of the dose rate introduces uncertainties due to substantial variability being observed in potassium, uranium and thorium which are the principal sources of environmental radiation. Recent research focusing on the recuperated signal of quartz Re-OSL however opens the way to overcome satisfactorily the problem of quartz saturation Wang et al. How do we measure the radiation dose rate? At this step, the SAR protocol can be summarised as follows tab. A record of deforestation and increased storminess. Quaternary Research 49,
Most of the research focused on the last interglacial-glacial cycle Antoine et al.
Supplement Band OSL works because all sediments have some natural radioactivity, caused by the presence of uranium, thorium and potassium isotopes in heavy minerals such as zircons. This partial bleaching can be homogeneous all the grains being incompletely bleached in the same proportion or heterogeneous differential bleaching. Nuclear Tracks and Radiation Measurements 17, The Holocene 12, A sample in which the mineral grains have all been exposed to sufficient daylight seconds for quartz; hundreds of seconds for potassium feldspar can be said to be of zero age; when excited it will not emit any such photons. Most of the research focused on the last interglacial-glacial cycle Antoine et al.