Collisional and thermal ionization of sodium Rydberg atoms I. Experiment for nS and nD atoms with n=8-20

Collisional and thermal ionization of sodium nS and nD Rydberg atoms with n=8-20 has been studied. The experiments were performed using a two-step pulsed laser excitation in an effusive atomic beam at atom density of about 2 10^{10} cm^{-3}. Molecular and atomic ions from associative, Penning, and thermal ionization processes were detected. It has been found that the atomic ions were created mainly due to photoionization of Rydberg atoms by photons of blackbody radiation at the ambient temperature of 300K. Blackbody ionization rates and effective lifetimes of Rydberg states of interest were determined. The molecular ions were found to be from associative ionization in Na(nL)+Na(3S) collisions. Rate constants of associative ionization have been measured using an original method based on relative measurements of Na_{2}^{+} and Na^{+} ion signals.Comment: 23 pages, 10 figure

REFERENCE STANDARDS OF ACTIVE INGREDIENTS OF POTENT ANALGESIC DRUGS

The article describes acute problem - absence of reference standards (Federal Reference Standards) of controlled ingredients of some potent pharmaceuticals (especially narcotic and psychotropic substances) in Russia. Authors present an algorithm for solving this task. According to regulatory documents providing traceability and technical regulation in Russian Federation requires use of the Federal Reference Standards for any official quantitative studies of narcotic and psychotropic substances. Lack of the reference standards does not allow provide: legally meaningful assessment of quality of medical products; to ensure industrial safety of work with substances belonging to list of dangerous goods; to conduct quantitative forensic analysis using instrumental methods, etc. Development of the Federal Reference Standards should be organized in the framework of technological cooperation of organizations (laboratories) which has necessary licenses. Production of the highest quality standards should be organized on a specialized facility where Federal S&T Center "Inversiya" has already made Federal Reference Standards of toxic chemicals. Creation and introduction in practices Federal Reference Standards of the controlled substances will provide scientific, technical and methodological foundations in development and implementation technologies for production of potent pharmaceutical ingredients in Russian Federation and solutions in the field of criminology and chemical safety and security