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The S-matrix element and the cross section of the laser-assisted nuclear photoeffect are recalculated in a gauge invariant manner taking into account the effect of the Coulomb field of the remainder nucleus. The \gamma-photon energy…

Nuclear Theory · Physics 2013-03-07 Péter Kálmán , Dániel P. Kis , Tamás Keszthelyi

A comprehensive theoretical approach to describe the electron-ion radiative recombination in the presence of intense, short laser pulses, which accounts for nondipole corrections is presented. It is based on the relativistic Coulomb-Volkov…

Quantum Physics · Physics 2024-05-13 Deeksha Kanti , M. M. Majczak , J. Z. Kamiński , Liang-You Peng , K. Krajewska

We survey the results of a long-term study of the process of radiative recombination. A rigorous theory of nonrelativistic electron radiative recombination with a hydrogen-like ion is used to calculate the total cross section of the…

Atomic Physics · Physics 2019-03-27 Igor A. Kotelnikov , Alexander I. Milstein

We study the laser-assisted twisted electron beam impact ionization of the hydrogen atom in coplanar asymmetric geometry. We develope the theoretical model in the first Born approximation. In the presence of the laser field, we treat the…

Atomic Physics · Physics 2023-08-29 Neha , Nikita Dhankhar , Raul Sheldon Pinto , Rakesh Choubisa

In this paper, the ionization and recombination coefficients of dense semiclassical hydrogen plasma on the basis of the effective interaction potential have been investigated. For this goal the Bohr$-$Lindhard method and method phase…

We present a theoretical study on the recombination of a free electron into the ground state of a hydrogen-like ion in the presence of an external laser field. Emphasis is placed on the effects caused by the laser dressing of the residual…

Atomic Physics · Physics 2016-03-10 Robert Alexander Müller , Daniel Seipt , Stephan Fritzsche , Andrey Surzhykov

Motivated by recent experiments on radiative recombination of two-dimensional electrons in acceptor doped GaAs-AlGaAs heterojunctions as well as the success of a harmonic solid model in describing tunneling between two-dimensional electron…

Strongly Correlated Electrons · Physics 2016-08-31 S. Kodiyalam , H. A. Fertig , S. Das Sarma

We consider the ionisation of atomic hydrogen by a strong infrared field. We extend and study in more depth an existing semi-analytical model. Starting from the time-dependent Schroedinger equation in momentum space and in the velocity…

We extend the semiclassical two-step model for strong-field ionization that describes quantum interference and accounts for the Coulomb potential beyond the semiclassical perturbation theory to the hydrogen molecule. In the simplest case of…

Atomic Physics · Physics 2019-03-27 N. I. Shvetsov-Shilovski , M. Lein , K. Tőkési

We perform a comprehensive analysis of complete fusion cross section data with the aim to derive, in a completely data-driven way, a model suitable to predict the integrated cross section of the fusion between light to medium mass nuclei at…

Nuclear Experiment · Physics 2022-12-07 Daniele Dell'Aquila , Brunilde Gnoffo , Ivano Lombardo , Francesco Porto , Marco Russo

Energy-changing electron-hydrogen atom collisions are crucial to regulating the energy balance in astrophysical and laboratory plasmas and relevant to the formation of stellar atmospheres, recombination in H-II clouds, primordial…

Instrumentation and Methods for Astrophysics · Physics 2015-06-17 Daniel Vrinceanu , Roberto Onofrio , Hossein R. Sadeghpour

The advent of powerful laser sources has made it possible to observe a relatively large cross section of the excited state of Hydrogen atom. This is due to the effect of joint collisions of a linearly polarized $N$-photon and high-energy…

Atomic Physics · Physics 2023-04-25 Behnam Nikoobakht

The first complete set of unified cross sections and rate coefficients are calculated for photoionization and recombination of He- and Li-like ions using the relativistic Breit-Pauli R-matrix method. We present total, unified (e + ion)…

Astrophysics · Physics 2016-08-30 Sultana N. Nahar , Anil K. Pradhan , Hong Lin Zhang

New X-ray observatories (Chandra and XMM-Newton) are providing a wealth of high-resolution X-ray spectra in which hydrogen- and helium-like ions are usually strong features. We present results from a new collisional-radiative plasma code,…

Astrophysics · Physics 2009-11-06 Randall K. Smith , Nancy S. Brickhouse , Duane A. Liedahl , John C. Raymond

Cosmological hydrogen recombination has recently been the subject of renewed attention because of its importance for predicting the power spectrum of cosmic microwave background anisotropies. It has become clear that it is necessary to…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-21 Yacine Ali-Haïmoud , Christopher M. Hirata

We have presented the experimental observation of the spatial structure of Molecular Assisted Recombination (MAR) including both dissociative recombination and mutual neutralization channels in the detached hydrogen plasma in the linear…

Plasma Physics · Physics 2007-05-23 Akira Tonegawa , Hiroyuki Yazawa , Kentarou Kumita , Masataka Ono , Kazutaka Kawamura

Accurate calculation of the ion-ion recombination rate coefficient has been of long-standing interest, as it controls the ion concentration in gas phase systems and in aerosols. We describe the development of a hybrid continuum-molecular…

Chemical Physics · Physics 2020-03-18 Tomoya Tamadate , Hidenori Higashi , Takafumi Seto , Christopher Hogan

Low-energy fusion of heavy ions is a fascinating coupling-assisted quantum tunnelling problem, whose understanding is crucial for advancing the synthesis of new elements and isotopes. Quantum dynamical coupled-channels calculations of…

Nuclear Theory · Physics 2025-07-02 Nicholas Thomson , Laura Moschini , Alexis Diaz-Torres

We present analytical expressions for direct evaluation of $\ell$-mixing rate coefficients in proton-excited hydrogen atom collisions and describe a software package for efficient numerical evaluation of the collisional rate coefficients.…

Instrumentation and Methods for Astrophysics · Physics 2019-07-17 D. Vrinceanu , R. Onofrio , J. B. R. Oonk , P. Salas , H. R. Sadeghpour

Laser- assisted antihydrogen formation cross sections (differential and total) via the three - body recombination (TBR) process in a plasma of antiprotons and positrons are studied for the ground and excited states . Significantly large…

Atomic Physics · Physics 2010-08-27 S. Ghosh Deb , C. Sinha
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