AI Article Synopsis
- The total scattering can be divided into two approximately equal contributions: one from the forward scattering lobe caused by 2D diffraction of a projected sphere and the other from 2D to 3D diffraction crossover.
- The forward scattering occurs at angles where the scattering angle (θ) is less than or equal to λ divided by the diameter (D) of the particle, which can be quite small for larger particles.
- The second contribution occurs in a new area called the "hump" in q-space, which represents the remaining half of the scattered light, but this hump diminishes when the imaginary part of the refractive index becomes significant.
Article Abstract
We define the partial scattering cross section and partial efficiencies to demonstrate that the total scattering is the sum of two roughly equal parts: approximately half from the forward scattering lobe due to 2D diffraction by the projected sphere and half from the 2D to 3D diffraction crossover. The first part is at angles such that θ≲λ/D, a result previously known, which can be quite small for large particles. The second part is in a new regime we call the "hump," visible in q-space, which to a good approximation contains the other half of the scattered light. The hump disappears when the imaginary part of the refractive index is significant.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/JOSAA.34.000681 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
H*10 neutron dosimetry (unlike gamma dosimetry), requires consideration of neutron energy spectra due to the 20× variation of the weight factor over the thermal-to-fast energy range, as well as the neutron radiation field dose rates ranging from cosmic, ~.01 μSv h-1 levels to commonly encountered ~10-200 μSv h-1 in nuclear laboratories/processing plants, and upwards of 104 Sv h-1 in nuclear reactor environments. This paper discusses the outcome of the comparison of spectrum-weighted neutron dosimetry covering thermal-to-fast energy using the novel H*-TMFD spectroscopy-enabled sensor system in comparison with measurements using state-of-the-art neutron dosimetry systems at SRNS-Rotating Spectrometer (ROSPEC), and non-spectroscopic Eberline ASP2E ("Eberline") and Ludlum 42-49B ("Ludlum") survey instrumentation.
View Article and Find Full Text PDFSmall-Angle and Quasi-Elastic Neutron Scattering from Polydisperse Oligolamellar Vesicles Containing Glycolipids.
J Phys Chem Lett
January 2025
Soft Matter Biophysics, Institute for Condensed Matter Physics, TU Darmstadt, Hochschulstraße 8, 64289 Darmstadt, Germany.
Glycolipids are known to stabilize biomembrane multilayers through preferential sugar-sugar interactions that act as weak transient membrane cross-links. Here, we use small-angle and quasi-elastic neutron scattering on oligolamellar phospholipid vesicles containing defined glycolipid fractions in order to elucidate the influence of glycolipids on membrane mechanics and dynamics. Small-angle neutron scattering (SANS) reveals that the oligolamellar vesicles (OLVs) obtained by extrusion are polydisperse with regard to the number of lamellae, , which renders the interpretation of the quasi-elastic neutron spin echo (NSE) data nontrivial.
View Article and Find Full Text PDFResonances in Low-Energy Electron Collisions with Salicylic Acid.
J Phys Chem A
January 2025
Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, 81531-980 Curitiba, Paraná, Brazil.
In this work, we report elastic integral, differential, and momentum-transfer cross sections for the scattering of low-energy electrons by salicylic acid. The cross sections were calculated with the Schwinger multichannel method implemented with norm-conserving pseudopotential within the static-exchange and static-exchange plus polarization (SEP) approximations for energies up to 15 eV. In the SEP approximation, four π* resonances were found at around 0.
View Article and Find Full Text PDFPolarization optical coherence tomography optoretinography: verifying light-induced photoreceptor outer segment shrinkage and subretinal space expansion.
Neurophotonics
January 2025
University of Illinois Chicago, Department of Biomedical Engineering, Chicago, Illinois, United States.
Significance: Stimulus-evoked intrinsic optical signal (IOS) changes in retinal photoreceptors are critical for functional optoretinography (ORG). Optical coherence tomography (OCT), with its depth-resolved imaging capability, has been actively explored for IOS imaging of retinal photoreceptors. However, recent OCT studies have reported conflicting results regarding light-induced changes in the photoreceptor outer segments (OSs), with both elongation and shrinkage being observed.
View Article and Find Full Text PDFUnderstanding the Topology Freezing Temperature of Vitrimer-Like Materials through Complementary Structural and Rheological Analyses for Phase-Separated Network.
ACS Macro Lett
January 2025
Department of Life Science and Applied Chemistry, Graduated School of Engineering, Nagoya Institute of Technology, Gokiso-cho Showa-ku, Nagoya-city, Aichi 466-8555, Japan.
Vitrimers are sustainable cross-linked polymers characterized by an associative bond exchange mechanism within their network. A well-known feature of vitrimers is the Arrhenius dependence of the viscosity or relaxation time. Another important aspect is the existence of a topology-freezing temperature (), which represents a transition between the viscoelastic solid state and the malleable viscoelastic liquid state.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!