Results 41 to 50 of about 542 (120)

Low-energy molecular collisions in a permanent magnetic trap [PDF]

, 2008
Cold, neutral hydroxyl radicals are Stark decelerated and confined within a magnetic trap consisting of two permanent ring magnets. The OH molecules are trapped in the ro-vibrational ground state at a density of $\sim10^{6}$ cm$^{-3}$ and temperature of ...
Benjamin K. Stuhl, Brian C. Sawyer, Dajun Wang, J. Guibert, J. Weinstein, Jun Ye, Mark Yeo   +6 more
core   +1 more source

A Case Study in China to Determine Whether GPS Data and Derivative Indicator Can Be Used to Identify Risky Drivers

Journal of Advanced Transportation, Volume 2019, Issue 1, 2019., 2019
This paper presents an investigation of the relationship between driver risk and factors indicating vehicle’s speed and driver’s acceleration behavior. The main objective is to examine whether GPS data and derivative indicator can be used to identify risky drivers by means of factor analysis.
Rui Fu, Tong Liu, Yuxi Guo, Shiwei Zhang, Wendong Cheng, Filomena Mauriello   +5 more
wiley   +1 more source

Slow and velocity-tunable beams of metastable He$_2$ by multistage Zeeman deceleration

, 2014
Metastable helium molecules (He$_2^*$) have been generated by striking a discharge in a supersonic expansion of helium gas from a pulsed valve. When operating the pulsed valve at room temperature, 77K, and 10K, the mean velocity of the supersonic beam ...
Agner, Josef A., Jansen, Paul, Merkt, Frédéric, Motsch, Michael, Schmutz, Hansjürg   +4 more
core   +1 more source

Zeeman-Sisyphus deceleration for heavy molecules with perturbed excited-state structure

Physical Review A, 2023
We demonstrate and characterize Zeeman-Sisyphus (ZS) deceleration of a beam of ytterbium monohydroxide (YbOH). Our method uses a combination of large magnetic fields ($\sim$ 2.5 T) and optical spin-flip transitions to decelerate molecules while scattering only $\sim$ 10 photons per molecule.
Hiromitsu Sawaoka, Alexander Frenett, Abdullah Nasir, Tasuku Ono, Benjamin L. Augenbraun, Timothy C. Steimle, John M. Doyle   +6 more
openaire   +2 more sources

Advanced switching schemes in a Stark decelerator [PDF]

, 2015
We revisit the operation of the Stark decelerator and present a new, optimized operation scheme, which substantially improves the efficiency of the decelerator at both low and high final velocities, relevant for trapping experiments and collision ...
Meijer, Gerard, Vanhecke, Nicolas, Zhang, Dongdong   +2 more
core   +2 more sources

Prospects for Studies of the Free Fall and Gravitational Quantum States of Antimatter

Advances in High Energy Physics, Volume 2015, Issue 1, 2015., 2015
Different experiments are ongoing to measure the effect of gravity on cold neutral antimatter atoms such as positronium, muonium, and antihydrogen. Among those, the project GBAR at CERN aims to measure precisely the gravitational fall of ultracold antihydrogen atoms.
G. Dufour, D. B. Cassidy, P. Crivelli, P. Debu, A. Lambrecht, V. V. Nesvizhevsky, S. Reynaud, A. Yu. Voronin, T. E. Wall, Ignatios Antoniadis   +9 more
wiley   +1 more source

Towards magnetic slowing of atoms and molecules [PDF]

, 2007
We outline a method to slow paramagnetic atoms or molecules using pulsed magnetic fields. We also discuss the possibility of producing trapped particles by adiabatic deceleration of a magnetic trap. We present numerical simulation results for the slowing
A Libson, Berman P, C G Parthey, Campargue R, E Narevicius, Early R A, Gupta M, Landau L D, Libson A, M F Riedel, M G Raizen, U Even, Vanhaecke N   +12 more
core   +2 more sources

Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

International Journal of Inorganic Chemistry, Volume 2012, Issue 1, 2012., 2012
Structure and magnetic properties of aerosol nanoparticles of Fe and its alloys (FeMn, FeNi, FeNiMn, FePt, FeCr, FeCo, and FeCu) have been reviewed. It has been shown that, compared to a bulk material, the particles have a number of specific features being of much fundamental and applied interest.
Yu. I. Petrov, E. A. Shafranovsky, Zbigniew Tomkowicz   +2 more
wiley   +1 more source

High-resolution spectroscopy of He$_2^+$ using Rydberg-series extrapolation and Zeeman-decelerated supersonic beams of metastable He$_2$

, 2016
Recently, high-resolution spectroscopy of slow beams of metastable helium molecules (He$_2^*$) generated by multistage Zeeman deceleration was used in combination with Rydberg-series extrapolation techniques to obtain the lowest rotational interval in ...
Jansen, Paul, Merkt, Frédéric, Semeria, Luca   +2 more
core   +1 more source

Spin Engineering of Dual‐Atom Site Catalysts for Efficient Electrochemical Energy Conversion

Advanced Materials, Volume 37, Issue 35, September 4, 2025.
This review highlights recent progress in spin engineering of dual‐atom site catalysts (DASCs), emphasizing how spin‐related properties enhance electrocatalytic activity, selectivity, and stability. It summarizes cutting‐edge developments in dual‐atom catalysis, discusses the underlying spin‐catalysis mechanisms and structure–performance relationships,
Dongping Xue, Yu Zhao, Jianliang Cao, Yan Wang, Xiaoning Li, Tianyi Ma   +5 more
wiley   +1 more source