Low-energy collisions of atomic ions and cluster ions with rare gas covered metal substrates can lead to strong light emission which is element and size specific. Instead of a direct energy transfer into the electronic system of the cluster the observed emission originates from excitons trapped in the rare gas layer which carries the excitation energy. The nature of the processes involved in th...

Low-temperature thermoluminescence has been used in attempt to understand the particular structure of ultra high dilutions. Samples are activated by irradiation after freezing at the temperature of liquid nitrogen (77 degrees K). Experimental results show that, in the course of rewarming, the thermoluminescent glow is susbtantially different between dilutions of different substances. It is sugg...

Photostimulated luminescence (PSL) and thermoluminescence (TL) from five L~2(1-~)Ce2~(Si04)0 &SO) crystals with different light outputs is reported. Optical irradiation into the Ce3+ absorption bands causes the appearance of a broad absorption band near 280 nm which is ascribed to Ce4+. In addition, a tail is observed extending beyond 700 nm. Optical irradiation into this tail (PSL) or heating ...

H. M. Gleiter10, N. Ohadb, J. Hirschbergb, R. Frommea, G. Rengera, H. Koikec, and Y. Inouec a M ax-V olm er-Institut für Physikalische und Biophysikalische Chemie, Technische U niversität Berlin, B undesrepublik D eutschland b D epartm ent o f Genetics, The H ebrew U niversity o f Jerusalem , Jerusalem 91904, Israel c The Institute o f Physical and Chem ical R esearch (RIK.EN), W ako, Saitam a ...