Now showing items 21-30 of 45
Crystal Vibrations of Polyethylene
(The American Institute of Physics, 1967-01-15)
Several problems involving the internal and external vibrations of the polyethylene crystal have been studied. The splittings of some of the internal vibration bands arising from transition dipole coupling have been evaluated ...
Five-dimensional quasi-spin the n, T dependence of shell-model matrix elements in the seniority scheme
(Elsevier, 1967-09-29)
The five-dimensional quasi-spin formalism is used to factor out the n, T dependent parts of shell-model matrix elements in the seniority scheme and derive reduction formulae which make it possible to express matrix elements ...
Weber's Mixed Boundary‐Value Problem in Electrodynamics
(The American Institute of Physics, 1967-03)
Electrodynamics problems with mixed boundary values promise to assume increasing practical importance in fields such as plasma physics. A new method of attacking such problems in three dimensions is presented and discussed.
Lowering and Raising Operators for the Orthogonal Group in the Chain O(n) ⊃ O(n − 1) ⊃ … , and their Graphs
(The American Institute of Physics, 1967-06)
Normalized lowering and raising operators are constructed for the orthogonal group in the canonical group chain O(n) ⊃ O(n − 1) ⊃ … ⊃ O(2) with the aid of graphs which simplify their construction. By successive application ...
Instability of a Liquid Film Flowing down an Inclined Plane
(The American Institute of Physics, 1967-02)
The mechanism of the instability of a layer of liquid flowing down an inclined plane is studied. First, the instability of the flow with respect to Tollimen‐Schlichting wave is investigated. The results obtained are then ...
Expansion Theorem for the Linearized Fokker‐Planck Equation
(The American Institute of Physics, 1967-04)
The linearized Fokker‐Planck kinetic equation for each component of a homogeneous, nondegenerate, fully ionized plasma is separated by means of a spherical harmonic expansion into an infinite set of singular intergo‐differential ...
Results on the Analyticity of Many‐Body Scattering Amplitudes in Perturbation Theory
(The American Institute of Physics, 1967-12)
The problem of analytic continuation of the many‐body scattering amplitude associated with a perturbation‐theory diagram under the rotation of the final momenta from real to complex momenta, k → (1 + iθ)k, is studied. It ...
Neutron—Diffraction Study of Cr and Cr Alloys
(The American Institute of Physics, 1967-03-01)
The principle quantities which parameterize the antiferromagnetism of Cr are studied by neutron diffraction as a function of temperature, pressure, magnetic field, and concentration of solute atoms. In order to account for ...