Results 31 to 40 of about 120,508 (261)
Enhanced quadrupole effects for atoms in surface spiral beams with a thin dielectric waveguide
Alexandria Engineering Journal, 2022 Recently, some physical research has recognized the coupling of optical phase singularity light with quadrupole-active atomic transitions. We show that a Laguerre-Gaussian beam, when completely internally reflected at the dielectric/vacuum interface, can
S. Al-Awfi
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Discussion of Quadrupole Precession [PDF]
American Journal of Physics, 1963 In this paper the motion of a nucleus with an intrinsic quadrupole moment in an external electrostatic field gradient is discussed from a classical point of view. It is shown that in the classical approximation the angular momentum may precess about the direction of strongest field gradient or about the direction of intermediate field gradient, but not
Raich, J. C., Good, R. H. jun.
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Multipole expansion of gravitational waves: memory effects and Bondi aspects
Journal of High Energy Physics, 2023 In our previous work, we proposed an algorithm to transform the metric of an isolated matter source in the multipolar post-Minkowskian approximation in harmonic (de Donder) gauge to the Newman-Unti gauge.
Luc Blanchet +4 more
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Supersymmetry and gravitational quadrupoles [PDF]
Physics Letters B, 1999 We derive model independent, non-perturbative supersymmetric sum rules for the gravitational quadrupole moments of arbitrary-spin particles in any N=1 supersymmetric theory. These sum rules select a ``preferred'' value of h=1 where the ``h-factor'' is the gravitational quadrupole analog of the gyromagnetic ratio or g-factor.
Giannakis, Ioannis +2 more
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Measurement and Simulation of Demagnetization in a Prototype Halbach Array Quadrupole
MetrologyWe present the design, construction, measurement, and troubleshooting of a prototype hybrid Halbach quadrupole magnet. This magnet was significantly under-strength due to local demagnetization in the permanent magnet material.
Alexander Bainbridge +5 more
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Evidence of quadrupole-quadrupole interactions in ultracold gases
, 2022 Van der Waals interactions are interactions between dipoles. Similarly, quadrupole-quadrupole interactions are interactions between quadrupoles. In this article, we focus on the interactions between two dipoles or two quadrupoles. Classically, we treat one Rydberg atom as a dipole; an outer excited electron and an ion core are the two poles of a dipole.
Han, Jianing +2 more
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Tau acetylation at K331 has limited impact on tau pathology in vivo
FEBS Letters, EarlyView.We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto +3 more
wiley +1 more source
Design and verification of a novel high gradient quadrupole magnet
He jishu, 2022 BackgroundHigh gradient quadrupole magnet has become a key element with the development of diffraction-limited storage ring for the fourth generation light source.
ZHU Ya, ZHANG Qinglei, ZHOU Qiaogen
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Quadrupole moment of 37K [PDF]
Physics Letters B, 2008 The electric quadrupole coupling constant of the ground state of 37K(3/2+, 1.22 s) in a tetragonal KH2PO4 single crystal was measured to be |eqQ/h| = 2.99 +- 0.07 MHz using the beta-ray detecting nuclear quadrupole resonance technique. The electric quadrupole moment of 37K was determined to be |Q(37K)| = 10.6 +- 0.4 efm2, where the known electric ...
K. Minamisono +6 more
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The distributional stress–energy quadrupole [PDF]
Classical and Quantum Gravity, 2020 Abstract We investigate stress–energy tensors constructed from the delta function on a worldline. We concentrate on quadrupoles as they make an excellent model for the dominant source of gravitational waves and have significant novel features.
Jonathan Gratus +2 more
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