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Inverse Compton scattering of an ultra-relativistic electron in the field of a high-intensity laser produces photon beams with angular and spectral distributions that are strongly dependent on the laser intensity. Here, we show that the…

等离子体物理 · 物理学 2024-07-17 K. Fleck , T. Blackburn , E. Gerstmayr , M. Bruschi , P. Grutta , M. Morandin , G. Sarri

We consider the elastic scattering of electrons by hydrogen atoms in the presence of a two-color circularly polarized laser field in the domain of moderate intensities below $10^{13}$ W/cm$^2$ and high projectile energies. A hybrid approach…

原子物理 · 物理学 2023-06-16 Gabriela Buica

Different computational methods are employed to evaluate elastic (rotationally summed) integral and differential cross sections for low energy (below about 10 eV) positron scattering off gas-phase C$_2$H$_2$ molecules. The computations are…

The elastic Rayleigh scattering of twisted light and, in particular, the polarization (transfer) of the scattered photons have been analyzed within the framework of second-order perturbation theory and Dirac's relativistic equation. Special…

原子物理 · 物理学 2018-05-23 A. A. Peshkov , A. V. Volotka , A. Surzhykov , S. Fritzsche

Using scanning gate microscopy (SGM), we probe the scattering between a beam of electrons and a two-dimensional electron gas (2DEG) as a function of the beam's injection energy, and distance from the injection point. At low injection…

介观与纳米尺度物理 · 物理学 2010-11-02 M. P. Jura , M. Grobis , M. A. Topinka , L. N. Pfeiffer , K. W. West , D. Goldhaber-Gordon

The angular and frequency correlation functions of the transmission coefficient for light propagation through a strongly scattering amplifying medium are considered. It is found that just as in the case of an elastic scattering medium the…

介观与纳米尺度物理 · 物理学 2009-10-31 A. A. Burkov , A. Yu. Zyuzin

We demonstrate a new near-analytical path to the threshold-size of random-lasing for the case of a uniform and isotropic-scattering sphere. We assess a geometric-distribution-probability (GDP) weighted integration of the diffusion-equation…

综合物理 · 物理学 2022-09-14 Daqing Piao

Electron-beam propagation experiments have been used to determine the energy and angle dependence of electron-electron (ee) scattering a two-dimensional electron gas (2DEG) in a very direct manner by a new spectroscopy method. The…

介观与纳米尺度物理 · 物理学 2009-10-31 A. V. Yanovsky , H. Predel , H. Buhmann , R. N. Gurzhi , A. N. Kalinenko , A. I. Kopeliovich , L. W. Molenkamp

We report on depolarized and non-depolarized dynamic light scattering, static light scattering, and static viscosity measurements on interacting charged gibbsite platelets suspended in dimethyl sulfoxide (DMSO). The average collective and…

软凝聚态物质 · 物理学 2012-02-03 Dzina Kleshchanok , Marco Heinen , Gerhard Nägele , Peter Holmqvist

Thomson scattering spectra measure the response of plasma particles to incident radiation. In warm dense matter, which is opaque to visible light, x-ray Thomson scattering (XRTS) enables a detailed probe of the electron distribution and has…

等离子体物理 · 物理学 2024-08-29 Thomas W. Hentschel , Alina Kononov , Andrew D. Baczewski , Stephanie B. Hansen

Manufacturing of particulate products across many industries relies on accurate measurements of particle size distributions in dispersions or powders. Laser diffraction (or small angle light scattering) is commonly used, usually off-line,…

软凝聚态物质 · 物理学 2016-10-18 Okpeafoh S. Agimelen , Anthony J. Mulholland , Jan Sefcik

The inelastic scattering of fast electrons by metastable hydrogen atoms in the presence of a linearly polarized laser field is theoretically studied in the domain of moderate field intensities. The interaction of the hydrogen atom with the…

原子物理 · 物理学 2023-06-19 Gabriela Buica

We investigate the scattering and absorption of light by random ballistic aggregates of spherical monomers. We present a general measure for the porosity of an irregular particle. Three different classes of ballistic aggregates are…

天体物理学 · 物理学 2009-11-13 Yue Shen , B. T. Draine , Eric T. Johnson

The scattering of light impacts sensing and communication technologies throughout the electromagnetic spectrum. Overcoming the effects of time-varying scattering media is particularly challenging. In this article we introduce a new way to…

Polydimethylsiloxane (PDMS) films possess different chemical and physical properties based on surface modification. The bond structure of pristine PDMS films and plasma treated PDMS films differ in a particular region of silicate bonds. We…

应用物理 · 物理学 2017-07-10 Amit R. Morarka , Aditee C. Joshi

Particle acceleration in relativistic shocks is studied analytically in the test-particle, small-angle scattering limit, for an arbitrary velocity-angle diffusion function D. Accurate analytic expressions for the spectral index s are…

天体物理学 · 物理学 2008-11-26 Uri Keshet

The accurate determination of the position-dependent energy fluence rate of scattered light (which is proportional to the energy density) is crucial to the understanding of transport in anisotropically scattering and absorbing samples, such…

光学 · 物理学 2024-09-23 Ozan Akdemir , Minh Duy Truong , Alfredo Rates , Ad Lagendijk , Willem L. Vos

In absence of a lens to form an image, incoherent or partially coherent light scattering off an obstructive or reflective object forms a broad intensity distribution in the far field with only feeble spatial features. We show here that…

Efficient processing of particulate products across various manufacturing steps requires that particles possess desired attributes such as size and shape. Controlling the particle production process to obtain required attributes will be…

Small-Angle Scattering (SAS) investigates structures in samples that generally range from approximately 0.5 nm to a few 100 nm. This can both be done for isotropic samples such as blends and liquids, as well as anisotropic samples such as…

仪器与探测器 · 物理学 2023-09-22 Sebastian Jaksch