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Single atoms can be considered as basic objects for electron microscopy to test the microscope performance and basic concepts for modeling of image contrast. In this work high-resolution transmission electron microscopy was applied to image…

材料科学 · 物理学 2011-09-21 B. Gamm , R. Popescu , H. Blank , R. Schneider , A. Beyer , A. Gölzhäuser , D. Gerthsen

Aims: To investigate the physical processing of PAHs in high-mass star-forming environments. This study aims to characterize how the PAH ionization fraction varies across different H II regions and to search for spectroscopic evidence of…

星系天体物理 · 物理学 2025-08-18 Atul Kumar Singh , Rahul Kumar Anand , Shantanu Rastogi

There are multiple techniques to determine the chemical composition of the ultra-high-energy cosmic rays. While most of the methods are primarily sensitive to the average atomic mass, it is challenging to discriminate between the two…

高能天体物理现象 · 物理学 2018-11-14 Ivan S. Karpikov , Grigory I. Rubtsov , Yana V. Zhezher

Proton Computed Tomography (pCT) provides a promising solution to enhance the accuracy of Relative Stopping Power (RSP) required for proton therapy planning. This research introduces a novel high-granularity pCT architecture that…

Nanoparticle surface structural dynamics is believed to play a significant role in regulating functionalities such as diffusion, reactivity, and catalysis but the atomic-level processes are not well understood. Atomic resolution…

The ionization of atoms with sequences of attosecond pulses gives rise to excited ionic states that are entangled with the emitted photoelectron. Still, the ionic ensemble preserves some coherence that can be controlled through the laser…

原子物理 · 物理学 2023-03-15 Saad Mehmood , Eva Lindroth , Luca Argenti

Phase-contrast transmission electron microscopy (TEM) of hexagonal ice (Ih) along [0001] sometimes shows a honeycomb-like pattern, often interpreted as individual oxygen columns in single crystals. Here, we show that this pattern commonly…

Using the new version of the photoionization code Titan designed for plane-parallel photoionized thick hot media, which is unprecedented from the point of view of line transfer, we have undertaken a study of the influence of different…

天体物理学 · 物理学 2009-11-10 Séverine Coupé , Olivier Godet , A. -M. Dumont , Suzy Collin

Soon after the LHC is commissioned with proton beams the ATLAS experiment will begin studies of Pb-Pb collisions with a center of mass energy of ?sNN = 5.5 TeV. The ATLAS program is a natural extension of measurements at RHIC in a direction…

核实验 · 物理学 2014-11-18 Sebastian N. White

The matter created in Ag+Ag collisions at $\sqrt{s_{NN}}$ = 2.55 GeV, as measured with the HADES experiment, can be characterized by similar thermodynamic quantities as Neutron Star Mergers, thus becoming an essential reference for the…

核实验 · 物理学 2024-01-24 Maria Stefaniak

One of the key signatures of the Quark-Gluon Plasma (QGP) is the modification of hadron transverse momentum differential cross-sections in heavy-ion collisions (HIC) as compared to proton-proton (pp) collisions. Suppression of hadron…

高能物理 - 实验 · 物理学 2017-03-08 Astrid Morreale

We have studied the reconstruction of Pt(111) theoretically using a two-dimensional Frenkel-Kontorova model for which all parameters have been obtained from ab initio calculations. We find that the unreconstructed surface lies right at the…

材料科学 · 物理学 2007-05-23 Shobhana Narasimhan , Raghani Pushpa

Ion specific outcomes at aqueous interfaces remain among the most enigmatic phenomena in interfacial chemistry. Here, charged fused silica/water interfaces have been probed by homodyne- and heterodyne-detected (HD) second harmonic…

Ion-irradiation-induced modifications of a periodic Pt/C multilayer system containing Fe impurity have been analyzed by transmission electron microscopy (TEM). The multilayer stack with 16 Pt/C layer pairs (period 4.23 nm) was fabricated on…

材料科学 · 物理学 2007-05-23 S. Bera , B. Satpati , K. Bhattacharjee , P. V. Satyam , B. N. Dev

Azimuthal angle two particle correlations have been shown to be a powerful probe for extracting novel features of the interaction between hard scattered partons and the medium produced in Au+Au collisions at RHIC. At intermediate $p_T$,…

核实验 · 物理学 2019-08-14 Anne Sickles

We study single-photon ionization of aligned H$_2^+$ in low-intensity near-circular laser fields with lower photon energy numerically and analytically. The photoelectron momentum distribution (PMD) within the laser polarization plane,…

原子物理 · 物理学 2025-05-13 Z. Y. Chen , S. Q. Shen , M. Q. Liu , J. Y. Che , Y. J. Chen

ALICE is the dedicated heavy-ion experiment at the LHC. Its main physics goal is to study the properties of the strongly-interacting matter in the conditions of high energy density (>10 GeV/fm3) and high temperature (> 0.3 GeV) expected to…

核实验 · 物理学 2011-02-02 Renu Bala

The absolute photodetachment cross-section characterizes the photostability of atomic and molecular anions against photodestruction by neutralization. The measurement of this quantity has been reported only for atomic and simple molecular…

原子与分子团簇 · 物理学 2025-09-23 Salvi Mohandas , Uma Namangalam , Abheek Roy , Hemanth Dinesan , S. Sunil Kumar

Zinc-ion batteries are promising alternatives to lithium-ion batteries, offering advantages in safety, cost, and environmental impact. However, their performance is often limited by the functioning of the zinc anode. This study employs…

材料科学 · 物理学 2025-03-31 Xinxin Hu , Shivam Dangwal , Xucheng Wang , Fan Zhang , Haijuan Kong , Jun Li , Kaveh Edalati

The adsorption of iron phthalocyanine (FePc) on the passivated H/Si(111) surface is explored from first principles. We find that the organic molecule is predominantly physisorbed with a distance to the surface of $2.6 \pm 0.1$ Angstrom, but…

材料科学 · 物理学 2019-05-06 Benjamin Geisler , Peter Kratzer
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