Results 251 to 260 of about 11,049,624 (308)

Phonon-induced quadrupole potential in diamond-type semiconductors

Journal of Physics C: Solid State Physics, 1972
Two models of covalent crystals, the shell model and the bond charge model, are used to calculate the quadrupole component of the valence charge distortion brought about by displacement of an atom from its equilibrium position. On the basis of the shell model it appears that the sources of the quadrupole extend over a considerable region around the ...
A. Pindor
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Potential of Nuclear Quadrupole Resonance in Pharmaceutical Analysis

Analytical Chemistry, 2005
Nuclear quadrupole resonance is a radio frequency (rf) spectroscopic technique, closely related to NMR, which can be used to detect signals from solids containing nuclei with spin quantum number >1/2. It is nondestructive, highly specific and noninvasive, requires no static magnetic field, and as such is currently used in the detection of explosives ...
Balchin, E, Malcolme-Lawes, D L, Poplett, L J F, Rowe, M D, Smith, J A S, Pearce, G E S, Wren, S A C   +6 more
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Tightly trapped highly excited Rydberg atom in dipole–quadrupole potential landscape

Journal of Modern Optics, 2019
In this paper, coherent Rydberg excitation of a single four-level atom in tightly confining trap so-called ‘far-off-resonance optical dipole-quadrupole trap’ (FORDQT) by considering Laguerre Gaussi...
L. Mashhadi
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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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Employing a spheroidal global potential to estimate the quadrupole deformation of nuclei

Physics of Atomic Nuclei, 2005
A spheroidal global shell potential is constructed on the basis of the optical model whose global parameters are extracted from experimental data on nucleon-nucleus scattering. This potential is used to estimate the quadrupole deformation of a large number of light, intermediate, and heavy nuclei in the mass-number range 10 ≲ A ≲ 240.
B. S. Ishkhanov, V. N. Orlin
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Brain Teleoperation Control of a Nonholonomic Mobile Robot Using Quadrupole Potential Function

IEEE Transactions on Cognitive and Developmental Systems, 2019
This paper presents the development of a brain–machine interfacing teleoperation control framework of a mobile robot using quadrupole potential function (QPF). The online brain–computer interface is based on steady-state visually evoked potentials, which
Wang Yuan, Zhijun Li
semanticscholar   +1 more source

The Importance of the Water Molecular Quadrupole for Estimating Interfacial Potential Shifts Acting on Ions Near the Liquid-Vapor Interface.

Journal of Physical Chemistry B, 2019
Interfacial electrostatic potential gradients arise from nonuniform charge distributions encountered crossing the interface. The charges involved can include the molecular charges predominantly bound to each neutral solvent molecule and distributions of ...
C. C. Doyle, Yu Shi, T. Beck
semanticscholar   +1 more source

Paints: A Source of Volatile PFAS in Air─Potential Implications for Inhalation Exposure.

Environmental Science and Technology, 2022
Paints are widely used in indoor settings yet there are no data for volatile per- and polyfluoroalkyl substances (PFAS) for paints or knowledge if paints are potentially important sources of human exposure to PFAS.
Liliana Cahuas, Derek J Muensterman, Mitchell L. Kim-Fu, P. Reardon, Ivan A. Titaley, J. Field   +5 more
semanticscholar   +1 more source

Dipole-Quadrupole Interaction in Spherical Nuclei and Berry Potentials

Physical Review Letters, 1988
We show that SO(3) gauge potentials arise in the Born-Oppenheimer description of the interaction between the dipole and quadrupole vibrations in even-even spherical nuclei and derive the effective Hamiltonian for the quadrupole motion.
, LeTourneux, , Vinet
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Collective potentials and dipole and quadrupole giant resonances

Nuclear Physics A, 1978
Abstract The dynamic collective model is extended into the energy region immediately above the giant dipole resonances, i.e. into an energy region between 20 and 28 MeV. The total Hamiltonian is constructed and the dynamical problem is solved by diagonalizing the Hamiltonian in the basis of a five-dimensional harmonic oscillator.
Rolf Sedlmayr, Monika Sedlmayr, Horst Stock   +2 more
openaire   +1 more source