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The motion of atoms and nanoparticles in a trap formed by sequences of counter-propagating light pulses has been analyzed. The atomic state is described by a wave function constructed with the use of the Monte Carlo method, whereas the…

原子物理 · 物理学 2013-05-23 V. I. Romanenko , A. V. Romanenko , Ye. G. Udovitskaya , L. P. Yatsenko

The molecular dynamics (MD) simulation study of solvation structure and free energetics in 1-ethyl-3-methylimidazolium chloride and 1-ethyl-3-methylimidazolium hexafluorophosphate using a probe solute in the preceding article [Y. Shim, M.…

软凝聚态物质 · 物理学 2009-11-11 Y. Shim , M. Y. Choi , H. J. Kim

The dynamics following the photoexcitation of Na and Li atoms located on the surface of helium nanodroplets has been investigated in a joint experimental and theoretical study. Photoelectron spectroscopy has revealed that excitation of the…

原子与分子团簇 · 物理学 2017-08-23 Alberto Hernando , Manuel Barranco , Martí Pi , Evgeniy Loginov , Marina Langlet , Marcel Drabbels

We have studied photoassociation of metastable \tripS helium atoms near the \tripS-\tripP asymptote by both ion detection in a magneto-optical trap and trap-loss measurements in a magnetic trap. A detailed comparison between the results of…

其他凝聚态物理 · 物理学 2015-06-25 J. Léonard , A. P. Mosk , M. Walhout , M. Leduc , M. van Rijnbach , D. Nehari , P. van der Straten

Atoms and molecules attached to rare gas clusters are ionized by an interatomic autoionization process traditionally termed 'Penning ionization' when the host cluster is resonantly excited. Here we analyze this process in the light of the…

The motion of metastable helium atoms travelling through a standing light wave is investigated with a semi-classical numerical model. The results of a calculation including the velocity dependence of the dipole force are compared with those…

原子物理 · 物理学 2007-05-23 S. J. H. Petra , K. A. H. van Leeuwen , L. Feenstra , W. Hogervorst , W. Vassen

$^4$He nanodroplets doped with an alkali ion feature a snowball of crystallized layers surrounded by superfluid helium. For large droplets, we predict that a transitional supersolid layer can form, bridging between the solid core and the…

量子气体 · 物理学 2025-03-12 Juan Carlos Acosta Matos , Panos Giannakeas , Matteo Ciardi , Thomas Pohl , Jan M. Rost

A recent expansion of cold and ultracold molecule applications has led to renewed focus on molecular species preparation under ultrahigh vacuum conditions. Meanwhile, molecular beams have been used to study gas phase chemical reactions for…

原子物理 · 物理学 2016-02-23 M. G. Kokish , V. Rajagopal , J. P. Marler , B. C. Odom

Kinetics of dislocations is studied by means of computer simulation during intensive plastic deformation. The dynamical effect in the form of soliton-like wave of sharply disrupted interparticle bonds is observed. Along with it, micropores…

材料科学 · 物理学 2007-05-23 L. S. Metlov

We demonstrate that atoms in magnetically insensitive hyperfine states (m=0) can be trapped efficiently by a Bose-Einstein Condensate of the same atomic species occupying a different hyperfine state. The latter is trapped magnetically.…

其他凝聚态物理 · 物理学 2008-11-17 Stephan Middelkamp , Igor Lesanovsky , Peter Schmelcher

This work describes the behaviour of water molecules in 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid under nanoconfinement between graphene sheets. By means of molecular dynamics simulations, an adsorption of water molecules…

Experiments on the formation of magnesium complexes in $^4$He nanodroplets were interpreted as the observation of the formation of weakly bound magnesium complexes. We present results for single Mg and Mg dimer solvation using the…

化学物理 · 物理学 2017-09-13 Eckhard Krotscheck , Robert E. Zillich

Plasmon-mediated superradiance for molecules around metallic nanospheres was proposed ten years ago. However, its demonstration has not been achieved yet due to the experimental difficulty of positioning molecules, and the theoretical…

While largely studied on the macroscopic scale, the dynamics leading to nucleation and fission processes in atmospheric aerosols are still poorly understood at the molecular level. Here, we present a joint experimental-theoretical study of…

We report on a kinematically complete experiment on strong field double ionization of helium using laser pulses with a wavelength of 394\,nm and intensities of $3.5-5.7\times10^{14}\,W/cm^2$. Our experiment reaches the most complete level…

We present a combined ion imaging and density functional theory study of the dynamics of the desorption process of rubidium and cesium atoms off the surface of helium nanodroplets upon excitation of the perturbed $6s$ and $7s$ states,…

原子与分子团簇 · 物理学 2015-03-03 J. von Vangerow , A. Sieg , F. Stienkemeier , M. Mudrich , A. Leal , D. Mateo , A. Hernando , M. Barranco , M. Pi

The selective optical detection of individual metallic nanoparticles (NPs) with high spatial and temporal resolution is a challenging endeavour, yet is key to the understanding of their optical response and their exploitation in…

介观与纳米尺度物理 · 物理学 2012-06-05 Francesco Masia , Wolfgang Langbein , Paola Borri

Janus particles are special types of nano or micro particles possessing at least two surfaces with distinct physical or chemical properties. The most studied Janus particles are the metal-dielectric particles, in which half surface of…

软凝聚态物质 · 物理学 2020-09-09 Dinesh Kumar Sahu , Surajit Dhara

While nanoalloys are of paramount scientific and practical interests, the main processes leading to their formation are still poorly understood. Key structural features in the alloy systems, including crystal phase, chemical ordering, and…

A detailed simple model is applied to study a high temperature hydrogen plasma ball. It is assumed that the ions and delocalized electrons are distributed randomly throughout the charged plasma ball (extra/missing charge is assumed to be…

等离子体物理 · 物理学 2011-11-10 Yuri Kornyushin