Results 221 to 230 of about 97,163 (263)

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.
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Nonadiabatic transport of cold atoms in a magnetic quadrupole potential

Applied Physics Letters, 2010
We experimentally demonstrated the transport of cold atoms in a magnetic quadrupole trap in the nonadiabatic regime on the order of the trap period. The trap potential velocity was controlled by varying the currents of the two pairs of anti-Helmholtz coils. We efficiently transported cold atoms with two velocity regimes.
Dongyuan Chen, Haichao Zhang, Xinping Xu, Tang Li, Yuzhu Wang   +4 more
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Quadrupoles in potential flow: two model problems

Journal of Fluid Mechanics, 1982
The Ffowcs Williams-Hawkings formulation of the sources of the acoustic analogy is examined by reference to two compressible inviscid flows whose density and velocity fields are known exactly. The purpose of this exercise is to generate some feel for the importance of the various source terms in determining the sound of moving surfaces with shocks, and
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Quadrupole Oscillator Strengths of Helium Interacting with Debye Potentials

Few-Body Systems, 2012
The influence of Debye potentials on the quadrupole oscillator strengths of helium atom is investigated using highly correlated wave functions within a framework of a variational method. The quadrupole oscillator strengths for the 1,3S–1,3D, 1,3P–1,3P and 1,3D–1,3D transitions of He for various screening parameters are reported for the first time in ...
Pinghui Jiang, Sabyasachi Kar
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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
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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
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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.
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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
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Electrostatic quadrupole lens simulation in potential array relaxation programs

Rapid Communications in Mass Spectrometry, 1989
Abstract Lens and ion trajectory simulation programs, such as the popular program SIMION, which employ potential array relaxation methods, are very useful in designing and modifying ion lens systems. Unfortunately, these programs cannot simulate lenses of certain geometries such as quadrupoles. Several approaches for portraying static
Palitha Jayaweera, Louis Ramaley, A. J. H. Boerboom   +2 more
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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.
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