Now showing items 81-90 of 132
Centrifugal distortions in molecules: An ab initio approach with application to phosphine
(Elsevier, 1988-12)
Our procedure for employing analytic gradients of ab initio potential energy hypersurfaces in the description of centrifugally distorted molecules is applied to a symmetric top, namely phosphine. Quartic centrifugal ...
Vector coherent state theory for the Sp(6)[superset or implies]U(3) branch of the S, D, fermion pair algebra
(Elsevier, 1988-07-11)
Vector coherent state theory is used to give very explicit matrix representations for the Sp(6) [superset or implies] U(3) branch of the Ginocchio S, D-pair algebra for all states of generalized S,D-pair seniority, u = 0, ...
Periodic solutions for three sedimenting spheres
(The American Institute of Physics, 1988-11)
Exact periodic solutions are found for the relative motion of three spheres sedimenting in a Stokes fluid. Nearby solutions are found to be nearly periodic for a long time. Existence of the exact periodic solutions is ...
Role of strain and growth conditions on the growth front profile of InxGa1−xAs on GaAs during the pseudomorphic growth regime
(The American Institute of Physics, 1988-08-22)
Theoretical and experimental studies are presented to understand the initial stages of growth of InGaAs on GaAs. Thermodynamic considerations show that, as strain increases, the free‐energy minimum surface of the epilayer ...
Crystal/chemical structures and magnetic properties of naturally occurring Mn1.7Fe1.3O4
(The American Institute of Physics, 1988-04-15)
An unusually pure Mnx Fe3−x O4 sample (x≂1.3) from a regionally metamorphosed ore body is expected to exhibit an approach to thermodynamic equilibrium unattainable in synthetic materials. This expectation is confirmed by ...
Structural fluctuations and randomness in GaAs---AlxGa1-xAs superlattices
(Elsevier, 1988)
We discuss the use of X-ray and Raman scattering to probe structural disorder in aperiodic GaAs---AlxGa1-xAs superlattices, including random and quasiperiodic examples. Evidence is found for the presence of monolayer-thick ...
A new look at exotic decays:
(Elsevier, 1988-11-24)
We study the decays of the exotic meson . We assume hybrid quark-glue structure and exhibit a large contribution to this decay in the QCD sum rules approach, and suggest that [eta]'[pi] rather than [varrho][pi] might be ...
Demonstration of all‐optical modulation in a vertical guided‐wave nonlinear coupler
(The American Institute of Physics, 1988-04-04)
The performance characteristics of an AlGaAs dual waveguide vertical coupler with a nonlinear GaAs/AlGaAs multiquantum well coupling medium are demonstrated. The structure was grown by molecular beam epitaxy and fabricated ...
Optical properties and Stokes shifts in lamp‐annealed InGaAs/GaAs strained layer superlattice
(The American Institute of Physics, 1988-04-15)
The effect of incoherent lamp annealing on the photoluminescence and optical absorption characteristics in InxGa1−xAs/GaAs(x=0.2 and 0.24) strained layer superlattices grown by molecular‐beam epitaxy has been investigated. ...
The statistics of the organized vortical structure in turbulent mixing layers
(The American Institute of Physics, 1988-09)
The statistics of the large scale vortex structure in turbulent mixing layers have been investigated theoretically. It is shown that similarity in the fully developed flow results in a common description of the Eulerian ...