Now showing items 261-270 of 322
Time‐Dependent One‐Speed Albedo Problem for a Semi‐Infinite Medium
(The American Institute of Physics, 1965-07)
A Laplace transformation technique is used to determine the neutron distribution in a semi‐infinite medium which has been irradiated by a neutron pulse. The result is given in terms of known solutions of Milne's problem ...
Sphere Drag in Flows of Almost‐Free Molecules
(The American Institute of Physics, 1965-05)
A kinetic theory of sphere drag in the transition flows, based on the Boltzmann equation for the Maxwellian molecules, is presented. The exact binary collision integral, in the first order Knudsen iteration, is expanded ...
Analytic Expressions Relating Surface Charge and Potential Profiles in the Space‐Charge Region in Semiconductors
(The American Institute of Physics, 1963-09)
The potential on the surface of a semiconductor is formulated analytically as a function of surface charge concentration by a double integration of Poisson's equation in one‐dimensional form. All combinations of the types ...
Matrix Elements for Configuration d4 in a Weak Octahedral Field Using Racah Methods
(The American Institute of Physics, 1967-11-15)
Employing Racah algebra, the general formula for calculating the matrix elements of a weak crystalline field for configuration dn has been derived. Applying this formula the matrix elements for d4 (including spin—orbit ...
Magnetic Interactions for the Electronic Configuration d5
(The American Institute of Physics, 1967-04-15)
Applying Horie's method, the matrix elements of spin—other‐orbit interaction for configuration d5 have been calculated. The magnetic interaction energy has also been calculated for Mn++ by means of perturbation theory. It ...
Dual Role of Viscosity in the Instability of Revolving Fluids of Variable Density
(The American Institute of Physics, 1961-07)
The stability of a viscous fluid between rotating cylinders and with a radial temperature gradient against the formation of axisymmetric disturbances (Taylor vortices) is considered, and it has been found that viscosity ...
TIME AVERAGE HOLOGRAPHY EXTENDED
(The American Institute of Physics, 1969-01-01)
It is demonstrated that the usefulness of time‐average holography in analyzing vibration can be extended by modulating the reference beam.
Inversion-vibration and inversion-rotation interactions in the ammonia molecule
(Elsevier, 1962)
An attempt has been made to extend the theory of ammonia inversion in order to account for the dependence of the inversion splitting on the full set of vibrational and rotational quantum numbers. The potential energy of ...
Construction of Invariant Scalar Amplitudes without Kinematical Singularities for Arbitrary-Spin Nonzero-Mass Two-Body Scattering Processes
(1967-09-09)
The relativistic transition amplitude for any two-body reaction involving only particles of nonzero mass but arbitrary spin is decomposed in terms of scalar amplitudes that are regular functions in the space of scalar ...
Single Mode Output with the Spectra‐Physics Model 125 He☒Ne Laser
(The American Institute of Physics, 1969-10)