Rydberg Atoms: High-Resolution Spectroscopy and Radiation Interaction—Rydberg Molecules

Microwave Emissions and the Problem of Modern Viral Diseases

The results of a study on the mechanisms of the influence of an increased level of microwave radiation on the growth of infectious, primarily viral, diseases in the environment are presented. This is the radiation of the earth's ionosphere, which reached its maximum in the late 1980s-early 2000s, following an increase in the level of solar activity since the 17th century. Over the past 30 years, the anthropogenic electromagnetic background has increased 100 times due to the development of cellular mobile communications and computerization. The predicted interaction of natural and anthropogenic sources of microwaves sharply increases their negative impact on the ecological situation. Of particular concern is the active spread in recent years of the new 5G communication standard; in the future, it is the development of the most dangerous millimeter range in our country. Energy from the environment in the microwave range can cause "unexpected behavior" in the DNA of viruses. Clarifications to the recommendations of experts on the protection of the population with the help of electromagnetic shielding, obtained in the framework of supramolecular physics of the environment, are proposed.

Laser-Spectroscopic Investigation of Higher Excited Electronic States of the KAr Molecule

Higher excited electronic states of the van der Waals molecule 39KAr have been investigated using a supersonic beam and a two-step excitation. Four hundred seventy Doppler-free lines have been observed in the second step leading to the electronic states 5d2Sigma, 5d2Pi, 5d2Delta, and 7s2Sigma. The spectroscopic parameters of rotation, of spin-orbit splitting, of spin-rotation coupling, and of lambda-type doubling have been determined for altogether 19 vibrational levels of these electronic states. The molecular spin-orbit splitting turns out to be -0.42 cm-1 for 5d2Delta and -0.15 cm-1 for 5d2Pi, which is in fair agreement with the theoretical prediction for a Hund's coupling case a. The vibrational numbering was deduced from theoretical calculations of the interatomic potential. Six vibrational levels have been assigned to the 5d2Delta and the 5d2Sigma state, respectively, allowing a determination of the Dunham coefficients in these two states. For the equilibrium parameters of the 5d2Delta state, we obtain Re = 3.22(15) Å, De = 900(80) cm-1. Copyright 1999 Academic Press.