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In a crossed molecular beam experiment, time‐of‐flight distributions of NH 3 molecules scattered from He have been measured as a function of the deflection angle at E =97.7 meV. The spectra, which cover a center‐of‐mass angular range from 97° to 168° show appreciable rotational energy...
A quantum mechanical theory is presented for the low temperature diffusion of atomic hydrogen on metal surfaces, based on a band model for the hydrogen motion. The theory is applicable to the diffusion of many interacting particles obeying quantum statistics. At low coverage the hydrogen band...
Experimental and a b i n i t i o dissociation energies of the (H 2 O) n (CH 3 CN) m H + ions are reported. The experimental energies range from 10–35 kcal/mol. The proton is best stabilized by placing the maximum number of acetonitrile molecules close to the protonated center in such a way that...
An anomalously large D parameter determined previously for the Ni 2 + EPR spectrum in FeSiF 6 ⋅ 6H 2 O perpendicular to the crystal c axis at 4.2 K is reinterpreted as a reduction of the effective value of g ⊥ through Ni 2 + –Fe 2 + exchange. Assuming a superexchange interaction of the form...
Ar n clusters generated in a supersonic nozzle beam are investigated by exploiting their different kinematical behavior in a scattering experiment. In a crossed molecular beam experiment the Ar n clusters are scattered from He atoms at E =69.7 meV. By measuring the angular and velocity...
Germanium L 2,3 M 2,3 M 4,5 and L 2,3 M 4,5 M 4,5 Auger spectra excited by Al K α1,2 radiation were measured for GeH 4 , GeF 4 , GeCl 4 , Ge(CH 3 ) 4 , and Ge(C 2 H 5 ) 4 . Energies and intensities were calculated by theoretical models based on a mixed coupling scheme using j j coupling for the...
The integrated infrared intensity of the symmetric O–H stretching vibration of the water molecule increases by a factor of 220 when the vapor is condensed to ice I. The increase occurs for three reasons, the first of which is that the dipole moment of an isolated water molecule in its...
The standardization idea previously applied for an orthorhombic Hamiltonian is now extended to the monoclinic crystal‐field Hamiltonian ( H CF ). Relations are given which allow for transformations of the three admissible forms of monoclinic H CF between themselves to achieve the ratio of B 2 2...
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