Now showing items 41-50 of 733
Renormalization of some one-space dimensional quantum field theories by unitary transformation
(Elsevier, 1971-11)
The one-space dimensional interaction is renormalized by unitary transformation. A uniformly convergent sequence of unitary operators is defined which transforms the sequence of cut-off Hamiltonians, arranged in order of ...
Electrostatic screening
(The American Institute of Physics, 1975-02)
Using the methods of partial differential equations and functional analysis, we investigate the electric field in the presence of a screen composed of wires of radius r spaced at distance R spread over a surface S. In the ...
Absorption of CO2 laser radiation in an exploded lithium wire plasma
(The American Institute of Physics, 1975-06)
An absorption experiment was performed with a pulsed TEA CO2 laser incident upon a partially ionized plasma created by exploding a 0.0025‐cm‐diam lithium wire in vacuum. Stark broadening of the Li I 6104‐Å line and line ...
Splitting of the phonon spectrum in 3 He- 4 He solutions
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1973-07)
The dynamic structure function for 4 He- 4 He density correlations S 44 ( k , ω) is calculated as a function of the wave vector k and frequency ω for a simple model of a 3 He- 4 He solution at various temperatures and small ...
Thermal conductivity of neon, argon, and xenon at high temperatures
(The American Institute of Physics, 1973-09-01)
Thermal conductivities λ of neon, argon, and xenon were measured at 760 mm Hg in the ranges 1000–1500 °K (neon, xenon) and 1000–2500 °K (argon). The data were correlated by expressions of the form λ = a Tb, where a and b ...
Free convective heat transfer from slender cylinders subject to uniform wall heat flux
(Elsevier, 1974)
For laminar flows over slender cylinders, the boundary-layer equations do not admit similarity solutions as do the laminar layers over cylinders with large radius. Consequently, the prediction of heat transfer from such ...
Molecular Exciton Cluster States and Spectra with Application to Benzene
(WILEY-VCH Verlag, 1977-06-01)
A cluster expansion is introduced for the determination of the optical absorption properties of cluster states in substitutionally disordered molecular crystals. This method is based on the Green's function expansion in ...
Singular f-sum rule for superfluid 4He
(Elsevier, 1979-10-15)
The validity and applicability to inelastic neutron scattering of a singular f-sum rule for superfluid helium, proposed by Griffin to explain the [varrho]s dependence in S(k, [omega]) as observed by Woods and Svensson, are ...
On the decay of 148 Pm
(Springer-Verlag, 1970-10)
The Β-γ directional correlation between the 1,930 keV Β -group and the 511 keV cascade γ -ray in the 5.4 d 148 Pm decay has been measured at 14 different γ -energy points. The anisotropy is found to be positive and is ...