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A number of aspects of the breakdown of the rotating wave approximation (RWA) in laser modified reactive collision processes are examined. An analysis is presented into the factors which are responsible for the breakdown and our conclusions are similar to those in a recent article by Last, save...
Sub‐Doppler resolution infrared spectra have been obtained and assigned for four vibrational bands of the hydrogen cyanide dimer, namely the ν 1 and ν 2 C–H stretching fundamentals and two hot bands. Accurate molecular constants are reported for all of these. In the case of the free C–H...
This paper examines the sensitivity of rotationally inelastic integral state‐to‐state cross sections to variations in the masses of the collision partners. We investigate the helium‐hydrogenic scattering system with its many physical isotopes and excellent a b i n i t i o potential. The...
The Tang–Toennies model J. Chem. Phys. 8 0 , 3725 (1984) has been modified to predict the potentials for ion–atom systems. First order SCF energies are used to describe the repulsive potential. The long range second order induction and dispersion potential terms up to R − 1 0 are either...
Sample‐spinning NMR techniques for measuring the heteronuclear dipolar/chemical shift two‐dimensional (2D) powder patterns are described. For compounds with more than one chemically distinct nucleus, the individual 2D powder patterns can be separately obtained by 3D switching‐angle...
The addition of solvent molecules, primarily water and some alcohols, to isolated tryptophan derivative molecules has been carried out using supersonic free jet techniques. The derivatives studied include 3‐indole acetic acid, 3‐indole propionic acid, N ‐acetyltryptophan ethyl ester,...
The nature of the inhomogeneous broadening of optical and ODMR spectral lines of aromatic molecules hosted in low temperature glasses is experimentally and theoretically investigated. Particular attention is paid to the relationships which exist between the various classes of inhomogeneously...
The molecules YC 2 , YC 3 , YC 4 , YC 5 , YC 6 , YC 7 , and YC 8 have been observed in a Knudsen effusion mass spectrometric investigation of the gas phase above the Y–Ir–Au–graphite system. The enthalpies Δ H ○ 0 of the reactions Y( g )+ n C(graph)=YC n ( g )( n =2–8) were evaluated...
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