[en] The luminescence techniques have evolved over the last 40 years to a powerful dating instrument in archaeology and geoscience. Depending on how the luminescence is stimulated, one distinguishes the phenomena of thermoluminescence (TL), optically stimulated luminescence (OSL) and infrared stimulated luminescence (IRSL). Each of these phenomena has its specific potential for dating various archaeological materals in the time range from medieval back to palaeolithic periods, or, speaking in geological terms, for dating of Holocene and late Pleistocene objects. The OSL and IRSL techniques are sometimes treated together as 'optical dating'. The luminescence techniques differ from other major dating techniques, such as ¹⁴C, essentially by their applicability to inorganic materials, their wide age-range from about 100 years to more than 100,000 years and the kind of datable events which are the last exposure to heat or to light. (author). 10 refs., 3 figs

No abstract available

[en] The age equation sets luminescence dating as a method of absolute dating. However, it is also characterized by the introduction of a large number of uncertainties. To assess these uncertainties, we decided to proceed under a Bayesian approach. The Bayesian approach is characterized by the formalization of the initial assumptions (prior). Thus, this approach can test the relevance of the different (expressed or implied) assumptions used to assess the dose. In the present communication, we focus on the relationship between the accumulated dose and the luminescence measurements in two cases: single aliquot regeneration and multiple aliquots additive dose methods. The aim is to see how the Bayesian approach can reduce the use of arbitrary criteria. - Highlights: • Bayesian approach is used to assess uncertainties in luminescence dating. • We focus on the relationship between the dose and the luminescence measurements. • OSL-SAR and TL-MAAD methods were investigated. • A model is presented for TL-MAAD, focussing on the plateau and the robustness to outliers.

[en] The luminescence techniques have evolved over the last 40 years to a powerful dating instrument in archaeology and geoscience. Depending on how the luminescence is stimulated, one distinguishes the phenomena of thermoluminescence (TL), optically stimulated luminescence (OSL) and infrared stimulated luminescence (IRSL). Each of these phenomena has its specific potential for dating various archaeological materals in the time range from medieval back to palaeolithic periods, or, speaking in geological terms, for dating of Holocene and late Pleistocene objects. The OSL and IRSL techniques are sometimes treated together as 'optical dating'. The luminescence techniques differ from other major dating techniques, such as ¹⁴C, essentially by their applicability to inorganic materials, their wide age-range from about 100 years to more than 100,000 years and the kind of datable events which are the last exposure to heat or to light. (author). 10 refs., 3 figs

[en] The luminescence techniques have evolved over the last 40 years to a powerful dating instrument in archaeology and geoscience. Depending on how the luminescence is stimulated, one distinguishes the phenomena of thermoluminescence (TL), optically stimulated luminescence (OSL) and infrared stimulated luminescence (IRSL). Each of these phenomena has its specific potential for dating of Holocene and late Pleistocene objects. The OSL and IRSL techniques are sometimes treated together as 'optical dating'. The luminescence techniques differ from other major dating techniques, such as ¹⁴C, essentially by their applicability to inorganic materials, their wide age-range from about 100 years to more than 100,000 years and the kind of datable events which are the last exposure to heat or to light. (author). 10 refs., 3 figs

[en] This paper discussed how super-radiant states have properties that make them particularly suitable for experiments to test the effects of gravitational curvature on the quantized electromagnetic field

[en] This paper reviews the work performed under the direction of the author during the past 5-10 years and devoted to the spectral luminescence investigation of a new group of solvation (including relaxation) processes that are nonlinear in the field of the intermolecular forces. Physical models are proposed for the investigated solvation mechanisms, which are caused by the nonlinear interaction of constant and induced dipoles, and it is shown that the semiempirical theory based on them agrees quantitatively with experiment. Specific considerations are presented concerning the possibility of the practical utilization of these scientific results. 28 refs., 6 figs., 4 tabs

[en] Nano composites based on ultrahigh molecular weight polyethylene UHMWPE and Cd₀,5Zn₀,5S were obtained with a component of 60/40 vol.% and dispersion of sulfides 80-100 nm. A comparative analysis of the photo -and radio thermoluminescence spectra with UV and / or γ-rays at 77 K was carried out, the values of T were determined, and the structural transitions were compared. The temperature dependences of the dielectric constant ε_k and dielectric loss tgδ (T) are obtained.

[en] An air bubble trapped in water by an oscillating acoustic field undergoes either spherical or nonspherical pulsations depending on the strength of the forcing pressure. Two different instability mechanisms (the Rayleigh-Taylor instability and parametric instability) cause deviations from sphericity. Distinguishing these mechanisms allows an explanation of many features of recent experiments on single bubble sonoluminescence, and suggests methods for finding sonoluminescence in different parameter regimes

[en] Luminescence dating of sediments requires the determination of two quantities: the equivalent radiation dose to which the sample has been exposed since the event that is being dated; and the radiation dose to which it is exposed per year. Dividing one quantity by the other gives the age of the sample. Over the past four years a new group of methods has been developed for the determination of the equivalent dose of a sample. These are collectively known as ''single aliquot'' methods since, in contrast to standard luminescence methods, all the measurements are made on one aliquot of the sample. This has considerable practical advantages in terms of precision and the speed of analysis. In addition to being an alternative to standard methods of luminescence dating, the new methods are able to identify poorly bleached samples and to work on small samples which could not practically be analysed by conventional methods. The most exciting prospect is the ability to date individual sediment grains, between about 100 and 300 μm in diameter. The different single aliquot methods are described and examples given of their application to specific sites. (Author)