Special Features of Impulse Electronophotoluminescence

We consider special features of luminescence and its excitation on exposure of condensed substances to nanosecond beams of electrons with an energy of 100–300 keV at a peak power density exceeding 3·10⁶ W/cm². This kind of luminescence (iephluminescence) is excited in the absence of dynamic equilibrium between the electrons injected into the substance and leaving it. The depth of a brightly luminescing layer is an order of magnitude larger than the depth of penetration of electrons into the substance. The basic mechanism underlying the excitation of the impurity centers of luminescence in this layer of the substance is the radiative recombination of electron–hole pairs on impurity ions without a change of the ion charge. We show that the iefluminescence encompasses the positive qualities of electro, xray, photo, and cathodoluminescence. The high brightness and informativeness of the spectrum of iephluminescence allows the use of the latter for a fast nondestructive analysis of a substance.     

The Special Features of Superluminal Evanescent Mode Propagation

The formal analogy between classical evanescentmodes and particle tunneling in wave mechanics hasrecently initiated microwave experiments. Studies withmicrowaves and later with single photons have revealed superluminal group and energy velocities ofevanescent modes (the classical analogy to tunnelingsolutions). Microwave experiments have even demonstratedsuperluminal propagation of frequency bandwidth limited signals. This result does allow achange of chronological order of events in an inertialsystem or between different inertial systems. Evanescentmodes do exist in a space free of time. The measured and the calculated dwell time of evanescentmodes are zero inside a barrier.     

Special Features of Nuclear Reactions Involving Loosely Bound Cluster Nuclei

Physics of Atomic Nuclei - Reactions involving loosely bound nuclei have many special features. An enhancement of interaction cross sections in the subbarrier energy region is one of them. This...     

Scaling Features of Two Special Markov Chains Involving Total Disasters

Journal of Statistical Physics - Catastrophe Markov chain population models have received a lot of attention in the recent past. We herewith consider two special cases of such models involving...     

Special Features of Photo- and Electroluminescence of Zinc and Magnesium Complexes

Russian Physics Journal - The results of spectral and luminescent study of zinc and magnesium metal complexes are presented. It is shown that radiation in mixed ligand complexes has the charge...