Results 221 to 230 of about 52,262 (263)

ELECTRONIC POLARIZABILITIES AND STERNHEIMER SHIELDING FACTORS

Physical Review, 1963
A new method is developed for determining the distortions (polarizabilities) induced in electronic distributions by valence electrons and/or crystalline fields and their effect (expressed as Sternheimer shielding factors) on magnetic and electric hyperfine interactions.
A. J. Freeman, R. E. Watson
openaire   +2 more sources

On the reciprocity factor for shielded microstrip

Microwave and Optical Technology Letters, 1995
AbstractNumerical results relating off‐diagonal elements of the impedance matrix [Z] for a two‐port waveguide junction are derived based on a general waveguide circuit theory [1] and a rigorous space‐domain approach. The junction between a coaxial line and a lossy shielded microstrip line is considered.
openaire   +1 more source

Shielding Factors and External Dose Evaluation

Radiation Protection Dosimetry, 1987
The kerma in typical European houses in urban and suburban environments due to the gamma radiation from the contamination of different deposition areas such as lawns, trees, windows, walls, roofs, paved areas, light-shafts and internal surfaces has been calculated by extensive Monte Carlo simulations.
P. Jacob, R. Meckbach (INVITED)
openaire   +1 more source

Atomic polarizabilities and shielding factors

Advances in Physics, 1962
Abstract A detailed discussion is given of the methods of calculating atomic polarizabilities and shielding factors and the relationships between them are demonstrated. The formulation of the uncoupled Hartree-Fock approximation is presented and it is shown that the methods are all approximate versions of it.
openaire   +1 more source

Moment Method Analysis of the Electric Shielding Factor of a Conducting TM Shield at ELF.

IEEE Transactions on Electromagnetic Compatibility, 1995
This paper presents an integral equation and method of moments (MM) solution to the problem of TM transmission by a metallic conducting shield at extremely low frequencies (ELF). To obtain an accurate and efficient solution, the equivalent volume polarization currents representing the shield are expanded in terms of physical basis functions ...
M. Kragalott, E. H. Newman
openaire   +2 more sources

Charts for estimating the axial shielding factors of open-ended cylindrical shields

IEEE Transactions on Magnetics, 1999
Axial shielding factors of single and double-shell open-ended cylindrical magnetic shields are calculated numerically and represented by charts. It is assumed that the thickness of the shells is small (1%) compared to the largest diameter and the permeability is independent of magnetic induction.
openaire   +1 more source

The polarizabilities and shielding factors of the beryllium sequence

Proceedings of the Physical Society, 1965
The fully coupled Hartree-Fock approximation is used to calculate the dipole and quadrupole polarizabilities and shielding factors of Be, B+ and C2+.
A Dalgarno, H A J McIntyre
openaire   +1 more source

Frequency-dependent dipole shielding factors

Journal of Physics B: Atomic and Molecular Physics, 1969
A frequency-dependent dipole shielding factor βinfinity(ω) is defined as the coefficient of proportionality between the electric-dipole induced field and a uniform external electric field, at the nucleus, when the external field varies sinusoidally with time and with circular frequency ω. From oscillator sum rules it is shown that βinfinity(ω) = N/Z0 +
V G Kaveeshwar, A Dalgarno, R P Hurst
openaire   +1 more source

Stress intensity factors for crack tip shielding or anti-shielding by impurity atoms

International Journal of Fracture, 1986
The average value of the crack tip stress intensity factor produced by a row of impurity atoms is calculated in this paper. The row of impurity atoms lies parallel to the crack front and is situated at an arbitrary position about a crack. The impurity atom produced mode I shielding/antishielding stress intensity factor LiI for a row of impurity atoms ...
J. Weertman, J. E. Hack
openaire   +1 more source

The Filling Factor of Shielded Dielectric Resonators

IEEE Transactions on Microwave Theory and Techniques, 1969
The use of dielectric resonators at microwave frequencies usually requires a shield to prevent loss of energy by radiation, and a coupling network. The efficiency of a given circuit depends on the filling factor, which expresses the circuit ability to store most of the input energy in the resonator, and little in the coupling network and surrounding ...
openaire   +1 more source