The total cross sections for Inelastic collisions between excited sodium and noble gas atoms in their ground states, leading to 2 2 3 P^y2 — — 3 ^3/2 excitation transfer in sodium, have been determined in a series of sensitized fluorescence experiments with pure sodium vapour and its mixtures with noble gases. In the experiments with pure sodium, the sodium vapour pressure was varied over the r...

Dynamics of Strong-Field Laser-Induced Micro-Plasma Formation in Noble Gases D. A. Romanov, R. Compton, A. Filin, R. J. Levis 1. Center for Advanced Photonics Research, College of Science and Technology Temple University, Philadelphia, PA 19122 2. Department of Physics, Temple University, Philadelphia, PA 19122 3. Department of Chemistry, Temple University, Philadelphia, PA 19122 (Physical Revi...

The utility of noble gases for phase determination has been limited by the lack of naturally occurring binding sites in proteins. Wild-type T4 lysozyme contains one such binding site. By mutating large hydrophobic residues to alanine, additional noble-gas binding sites have been successfully introduced into this protein. Using data from xenon derivatives of the wild type, two single mutants and...

We discuss the present status and reliability of theoretical predictions of noble-gas hydride molecules. It is shown that the single-reference MP2 calculations can produce a rather inaccurate energy diagram for the formation of noble-gas hydrides, and this may mislead the theoretical predictions. We suggest that the computational dissociation energy of the HY precursors should always be compare...

The Fermi-contact interaction that characterizes collisional spin exchange of a noble gas with an alkali-metal vapor also gives rise to NMR and EPR frequency shifts of the noble-gas nucleus and the alkali-metal atom, respectively. We have measured the enhancement factor κ0 that characterizes these shifts for Rb-129Xe to be 493±31, making use of the previously measured value of κ0 for Rb-3He. Th...

We present calculations at the relativistic coupled cluster theory that predict the (1)Sigma(0) (+) ground state of CUO to lie 58.2 kJ/mol below the first excited state, (3)Phi(2). This can be contrasted with the outcome of earlier density functional theory and complete active space second order perturbation theory (CASPT2) calculations that both predicted a (3)Phi(2) ground state upon inclusio...

Introduction: On line etching is very useful to analyse noble gas components such as “Q” or the solar wind [1, 2]. A bulk meteorite sample, however, has never been analysed by on line etching in order to characterise its complete noble gas inventory. Experiment: The aim of this ongoing study is to analyse noble gases in a bulk sample of the EH5 chondrite St. Mark’s by on line etching (conc. HF)...

Analysis of IR and Raman spectra of Ar@C(60) and Kr@C(60) shows that the incorporation of noble gas atoms causes a blue shift of low energy vibrations, which have radial character, and a red shift of higher energy ones which have a tangential character movement. The mechanism of these phenomena is explained on the basis of ab initio numerical experiments with DFT and MP2 procedures. Methodologi...

We study the performance of the tr iple-GEM (Gas Electron Multiplier) detector in pure noble gases Ne, Ar and Xe, at different pressures varying from 1 to 10 atm. In Ar and Xe, the maximum attainable gain of the detector abruptly drops down for pressures exceeding 3 atm. In contrast , the maximum gain in Ne was found to increase with pressure, reaching a value of 10 a t 7 atm. The results obtai...