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The ionization by photon or electron impact of the inner (2a1) and outer (1t2) valence orbitals of the CH4 molecule is investigated theoretically. In spite of a number of approximations, including a monocentric approach and a rather simple…

Chemical Physics · Physics 2024-05-15 Abdallah Ammar , Arnaud Leclerc , Lorenzo Ugo Ancarani

We investigate the resonance-enhanced few-photon ionization of atomic lithium by linearly polarized light whose frequency is tuned near the 2s-2p transition. Considering the direction of light polarization orthogonal to the quantization…

We observed elastic collisions between laser-cooled fermionic lithium atoms and calcium ions at the energy range from 100 mK to 3 K. Lithium atoms in an optical-dipole trap were transported to the center of the ion trap using an optical…

Atomic Physics · Physics 2015-06-15 Shinsuke Haze , Sousuke Hata , Munekazu Fujinaga , Takashi Mukaiyama

In this paper we present Classical Trajectory Monte Carlo (CTMC) calculations for single and multiple electron ionization of Argon atoms and ions in the threshold region. We are able to recover the Wannier exponents a for the power-law…

Atomic Physics · Physics 2014-11-18 F. Sattin , K. Katsonis

The spin polarization of heavy quarks in heavy-ion collisions at the LHC is estimated from effective field theories (EFTs). One EFT is similar to the HQET used at zero temperature. This gives a coupling of the heavy quark spin to colour and…

High Energy Physics - Phenomenology · Physics 2023-07-25 Sourendu Gupta

Because micro-ions accumulate around highly charged colloidal particles in electrolyte solutions, the relevant parameter to compute their interactions is not the bare charge, but an effective (or renormalized) quantity, whose value is…

Soft Condensed Matter · Physics 2009-11-07 Lyderic Bocquet , Emmanuel Trizac , Miguel Aubouy

In the present work, initially a mixed-three-spin (1/2,1,1/2) cell of a mixed-N-spin chain with Ising-XY model is introduced, for which pair spins (1,1/2) have Ising-type interaction and pair spins (1/2,1/2) have both XY-type and…

Statistical Mechanics · Physics 2018-03-15 Hamid Arian Zad , Hossein Movahhedian

The exchange and correlation $E_{xc}$ of strongly correlated electrons in 2D layers of finite width are studied as a function of the density parameter $r_s$, spin-polarization $\zeta$ and the temperature $T$. We explicitly treat…

Strongly Correlated Electrons · Physics 2009-11-11 M. W. C. Dharma-wardana

We report theoretical and experimental studies of the longitudinal electron spin and orbital relaxation time of interstitial Li donors in $^{28}$Si. We predict that despite the near-degeneracy of the ground-state manifold the spin…

Other Condensed Matter · Physics 2008-07-25 V. N. Smelyanskiy , A. G. Petukhov , A. M. Tyryshkin , S. A. Lyon , T. Schenkel , J. W. Ager , E. E. Haller

As a fundamental property of the electron, the spin plays a decisive role in the electronic structure of matter from solids to molecules and atoms, e.g. causing magnetism. Yet, despite its importance, the spin dynamics of electrons released…

Lambda polarization can be measured through its self-analyzing weak decay, making it an ideal candidate for studying spin effects in high energy scatterings. In lepton-nucleon deeply inelastic scatterings (DIS), Lambda polarization…

Nuclear Experiment · Physics 2023-08-31 Zhaohuizi Ji , Xiaoyan Zhao , Aiqiang Guo , Qinghua Xu , Jinlong Zhang

Spin-dependent transport through an interacting single-level quantum dot coupled to ferromagnetic leads with non-collinear magnetizations is analyzed theoretically. The transport properties and average spin of the dot are investigated…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 W. Rudzinski , J. Barnas , R. Swirkowicz , M. Wilczynski

Electronic correlations in the ground state of an idealized infinite-layer high-Tc compound are computed using the ab-initio method of local ansatz. Comparisons are made with the local-density approximation (LDA) results, and the…

Superconductivity · Physics 2009-10-31 Gernot Stollhoff

In recent years, there has been increasing interest in the specific heat $C$ of insulators and semiconductors because of the availability of samples with different isotopic masses and the possibility of performing \textit{ab initio}…

Materials Science · Physics 2007-05-23 Diaz-Luis , A. H. Romero , M. Cardona , R. K. Kremer , X. Gonze

If signals of new physics are discovered at the LHC it will be crucial to determine the spin structure of the new model. We discuss a method that can help to address this question with a low integrated luminosity, L=1 fb^-1, at sqrt{s}=14…

High Energy Physics - Phenomenology · Physics 2015-03-18 Gudrid Moortgat-Pick , Krzysztof Rolbiecki , Jamie Tattersall

We present calculations of spin-relaxation rates of alkali-metal atoms due to the spin-axis interaction acting in binary collisions between the atoms. We show that for the high-temperature conditions of interest here, the spin relaxation…

Atomic Physics · Physics 2009-11-06 S. Kadlecek , T. Walker , D. K. Walter , C. Erickson , W. Happer

The control of the ultracold collisions between neutral atoms is an extensive and successful field of study. The tools developed allow for ultracold chemical reactions to be managed using magnetic fields, light fields and spin-state…

Atomic Physics · Physics 2017-09-05 Tomas Sikorsky , Ziv Meir , Ruti Ben-shlomi , Nitzan Akerman , Roee Ozeri

The absolute L subshell specific electron impact ionization cross sections near the ionization threshold (16 < E < 45 keV) of Lead and Thorium are obtained from the measured L X-ray production cross sections. Monte Carlo simulation is done…

Atomic Physics · Physics 2015-08-26 H. V. Rahangdale , P. K. Das , S. De , J. P. Santos , D. Mitra , M. Guerra , S. Saha

In this study, we investigate the influence of deconfined QCD matter on quarkonium spin alignment in ultra-relativistic heavy-ion collisions. We estimate the spin alignment of charmonium ($J/\psi$, and $\psi$(2S)) and bottomonium…

High Energy Physics - Phenomenology · Physics 2025-06-12 Bhagyarathi Sahoo , Captain R. Singh , Raghunath Sahoo

We examine the effective counterion-mediated electrostatic interaction between two like-charged dielectric cylinders immersed in a continuous dielectric medium containing neutralizing mobile counterions. We focus on the effects of image…

Soft Condensed Matter · Physics 2015-05-18 Matej Kanduc , Ali Naji , Rudolf Podgornik