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Photodestruction cross sections have been measured for CO 3 − , CO 3 − ⋅H 2 O, CO 4 − , CO 4 − ⋅H 2 O, HCO 3 − , and HCO 3 − ⋅H 2 O at various ion laser and dye laser wavelengths between 5300 and 3500 Å using a drift tube mass spectrometer as the source of the ions. CO 3 −...
An analysis, in terms of Newman’s superposition model, of the cubic spin–Hamiltonian parameters for divalent manganese and trivalent iron in fluoroperovskite and II–VI compounds is presented. Values for the intrinsic parameter ? 4 and for the power‐law exponent t 4 of Mn 2+ with F − , S...
The low frequency (10 2 –10 5 Hz) dielectric relaxation behavior of small dipolar molecules dispersed in supercooled o ‐terphenyl has been studied below the glass transition temperature. Broad asymmetric loss curves are obtained for both rigid and nonrigid solute molecules. The relaxation...
Inelastic collisions between N + 2 ions and alkali atoms Li, K) have been investigated in the kinetic energy range 50–1000 eV (lab) using a crossed beam apparatus and spectroscopic analysis of collision‐produced radiation (180–850 nm). Collision‐induced excitation to the lowest alkali...
The CFCl radical has been produced in the gas phase by both IR multiphoton photolysis of C 2 F 3 Cl and He metastable reaction with C 2 F 3 Cl. Single vibronic level fluorescence and excitation spectra taken of this species have yielded sufficient information to determine certain vibronic...
We report here an analysis of extensive configuration interaction (CI) wave functions for the 1 s 2 ground state of the helium atom using piecewise polynomial basis functions. Large numbers of natural radial orbitals (NROs) with l ranging from 0 to 11 have been treated accurately and analyzed...
Pressure dependence of the Raman OH−streching frequency of ice VI is reported over a pressure range of 9−21 kbar. The ice samples were examined in a diamond anvil cell and pressures were measured by the ruby fluoresence method. (AIP)
The fluorescence excitation spectrum of XeF cooled in a supersonic expansion with helium has been observed for the wavelength region 2860 to 3205 Å. The cold spectrum displays well‐resolved rotational structure for seven of the XeF isotopic species. Analysis of this rotational structure is...
The rotational diffusion coefficient of tRNA is measured using two different techniques. Fabry‐Perot interferometry and photoelectron pulse time of arrival technique are ccompared on fast decay rates in the nanoseconds range. (AIP)
We develop a simple method that yields analytic results for the mean first passage time and mean extreme value of Fokker–Planck processes in the asymptotic regime. The results are very sensitive to the detailed structure of the drift and diffusion terms in the Fokker–Planck equation. We apply...
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