Results 271 to 280 of about 11,049,624 (308)

Far-field potential production by quadrupole generators in cylindrical volume conductors

Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section, 1993
Far-field potentials have been observed clinically and recognized as such for approximately 30 years. Unfortunately a complete understanding of far-field potential generation is not yet at hand. An attractive model is the representation of an action potential by a quadrupole consisting of a leading and trailing dipole with respect to the direction of ...
D, Dumitru, J C, King
openaire   +2 more sources

Nuclear quadrupole moment and effects of nucleus–nucleus scattering potential

Modern Physics Letters A, 2019
This paper presents the results of the nuclear electrical quadrupole moment of the 17O and 2H before and after their scattering interaction near the Coulomb barrier. The distribution of nuclei’s charge (the quadrupole moment of nuclei) was examined for 2H and 17O when interacting together.
Laleh Nickhah, Ali Akbar Rajabi, Majid Hamzavi   +2 more
openaire   +1 more source

Gauge potential for neutral atoms in a magnetic quadrupole field

Journal of the Korean Physical Society, 2013
We consider a spinor Bose-Einstein condensate of neutral atoms in a magnetic quadrupole field and investigate the gauge potential derived from the spatially-varying magnetic field. We discuss the critical condition for a singular, quantized vortex state being energetically favored in the spinor condensate and find that it is necessary under ...
Yong-il Shin, Jae-yoon Choi
openaire   +1 more source

Quadrupole Correction: From Molecular Electrostatic Potential to Free Energies of Halogen Bonding

Journal of Chemical Theory and Computation, 2018
Recently several molecular mechanics models of halogen bonding have been published. They describe the electrostatic potential anisotropy near the heavy halogen atom (known as a σ-hole) in different ways, ranging from an all-atom multipole expansion to a single positive extra-point charge.
Oleg I. Titov, Dmitry A. Shulga, Vladimir A. Palyulin   +2 more
openaire   +2 more sources

Navigation and collision avoidance for nonholonomic robots using quadrupole potential function

2017 2nd International Conference on Advanced Robotics and Mechatronics (ICARM), 2017
In this paper, for path planning in indoor cluttered environments, a non-holonomic motion planner based on a novel artificial potential field is presented. Combined with a low-level controller, it not only guarantees obstacle avoidance but also can stabilize the noholonomic mobile robot to a goal configuration including orientation.
Wang Yuan, Zhijun Li
openaire   +1 more source

POTENTIAL-ENERGY SURFACES OF SODIUM CLUSTERS WITH QUADRUPOLE, HEXADECAPOLE, AND TRIAXIAL DEFORMATIONS

Surface Review and Letters, 1996
Combining a modified Nilsson-Clemenger model with the shell-correction method, the potential-energy surfaces of sodium clusters with sizes of up to N = 200 atoms are calculated, including nonaxial deformations. For spherical clusters, the model potential is fitted to the single-particle spectra obtained from microscopically self-consistent Kohn-Sham ...
Reimann, S. M., Frauendorf, S.
openaire   +2 more sources

The quadrupole moment of the deuteron and local potential models

Physica Scripta, 1989
It was believed that the value of the quadrupole moment of the deuteron Q is too large to be fitted by realistic local potential models. Two simple local potential models for the deuteron with large Q are considered.
openaire   +1 more source

RADIAL MATRIX ELEMENT FOR THE QUADRUPOLE TRANSITION WITH THE MORSE POTENTIAL

Canadian Journal of Physics, 1952
A general formula for the radial part of the matrix element for the quadrupole transition with the Morse potential is derived using standard methods of analysis. The same methods can also be used to derive an expression for the radial part of the dipole transition matrix element.
openaire   +2 more sources

Pion-nucleus potential parameters and quadrupole effect in deeply bound pionic atom

Nuclear Physics A, 1999
Abstract We have examined a possibility of determining the pion-nucleus potential parameters from the quadrupole hyperfine structure of the deeply bound pionic atoms in deformed nuclei. It is shown that the potential parameter sets, which lead to the similar level shifts and widths for spherical nuclei, predict fairly different hyperfine structure in
N. Nose-Togawa, S. Hirenzaki, K. Kume
openaire   +1 more source

Study of a quadrupole ion trap supplied with a periodic impulsional potential

International Journal of Mass Spectrometry and Ion Processes, 1991
This paper shows the possibility of confining ions inside a quadrupole ion trap supplied with a periodic impulsional potential of the form V0 cosΩt/(1 − k cos2Ωt) with 0 ⩽ k < 1. This potential is very interesting because it presents large zero potential temporal zones during which it is possible to inject ions or electrons inside the trap without ...
S.M. Sadat Kiai, J. Andre, Y. Zerega, G. Brincourt, R. Catella   +4 more
openaire   +1 more source