Atoms  

Nikolay M. Kabachnik and Irina P. Sazhina

The spin polarization of photoelectrons in two-color XUV + optical multiphoton ionization is theoretically considered using strong field approximation. We assume that both the XUV and the optical radiation are circularly polarized. It is shown that the sp... see more

Luc Kazandjian, François Soubiran and Jean-Christophe Pain

The Wigner-Kirkwood expansion of the quantum correction to the classical free energy is generally said to be in powers of ℏ2" role="presentation">?2?2 ? 2 and only its first few terms are presented. In this work, we use the Bloch differential ... see more

Abdelaali Boudjemaa, Karima Abbas and Nadia Guebli

We investigate the effects of higher-order quantum fluctuations on the bulk properties of self-bound droplets in three-, two- and one-dimensional binary Bose mixtures using the Hartree–Fock–Bogoliubov theory. We calculate higher-order corrections to the e... see more

Dhanoj Gupta, Heechol Choi, Deuk-Chul Kwon, He Su, Mi-Young Song, Jung-Sik Yoon and Jonathan Tennyson

Electron collision cross-sections of c-C4F8 were investigated at low energies by using the R-matrix method. The static exchange (SE), static exchange with polarization (SEP), and close-coupling (CC) models of the R-matrix method were used for the calculat... see more

Laurence Campbell, Dale L. Muccignat and Michael J. Brunger

The concept of treating subranges of the electron energy spectrum as species in chemical models is investigated. This is intended to facilitate simple modification of chemical models by incorporating the electron interactions as additional rate equations.... see more

Mustapha Laatiaoui and Sebastian Raeder

This article briefly reviews topics related to actinide research discussed at the virtual workshop Atomic Structure of Actinides & Related Topics organized by the University of Mainz, the Helmholtz Institute Mainz, and the GSI Helmholtz Centre for Hea... see more

Pankaj Garkoti, Meetu Luthra, Kanupriya Goswami, Anand Bharadvaja and Kasturi Lal Baluja

In the present work, we assess the effectiveness of singly differential cross sections (SDCS) due to electron-impact ionization by invoking the binary-encounter-Bethe (BEB) model on various atomic and molecular targets. The computed results were compared ... see more

Julia Even, Xiangcheng Chen, Arif Soylu, Paul Fischer, Alexander Karpov, Vyacheslav Saiko, Jan Saren, Moritz Schlaich, Thomas Schlathölter, Lutz Schweikhard, Juha Uusitalo and Frank Wienholtz

The heaviest actinide elements are only accessible in accelerator-based experiments on a one-atom-at-a-time level. Usually, fusion–evaporation reactions are applied to reach these elements. However, access to the neutron-rich isotopes is limited. An alter... see more

Naomy Duarte Gomes, Bárbara da Fonseca Magnani, Jorge Douglas Massayuki Kondo and Luis Gustavo Marcassa

In this work, we have applied polarization spectroscopy to study electromagnetically induced transparency involving hot Rb85 Rb 85 Rydberg state in a vapor cell using a Laguerre–Gaussian mode beam. Such spectroscopy technique generates a dispersive signa... see more

Danny Münzberg, Michael Block, Arno Claessens, Rafael Ferrer, Mustapha Laatiaoui, Jeremy Lantis, Steven Nothhelfer, Sebastian Raeder and Piet Van Duppen

Laser spectroscopic studies of elements in the heavy actinide and transactinide region help understand the nuclear ground state properties of these heavy systems. Pioneering experiments at GSI, Darmstadt identified the first atomic transitions in the elem... see more

Felix Duensing and Paul Scheier

A new database and viewer for mass spectra resulting from collision processes is presented that follows the standards of the Virtual Atomic and Molecular Data Centre (VAMDC). A focus was placed on machine read and write access, as well as ease of use. In ... see more

Francesco Scazza, Matteo Zaccanti, Pietro Massignan, Meera M. Parish and Jesper Levinsen

Polaron quasiparticles are formed when a mobile impurity is coupled to the elementary excitations of a many-particle background. In the field of ultracold atoms, the study of the associated impurity problem has attracted a growing interest over the last f... see more

Grzegorz P. Karwasz

Stylianos Petrakis, Makis Bakarezos, Michael Tatarakis, Emmanouil P. Benis and Nektarios A. Papadogiannis

The generation of high-order harmonics in a semi-infinite cell by femtosecond laser pulses is a common practice for reliable coherent and low divergence XUV source beams for applications. Despite the relative simplicity of the experimental method, several... see more

Larissa V. Chernysheva and Vadim K. Ivanov

The article is devoted to a brief description of the ATOM computer program system, designed to study the structure, transition probabilities and cross sections of various processes in multielectron atoms. The theoretical study was based on the concept of ... see more

Felix Weber, Christoph Emanuel Düllmann, Vadim Gadelshin, Nina Kneip, Stephan Oberstedt, Sebastian Raeder, Jörg Runke, Christoph Mokry, Petra Thörle-Pospiech, Dominik Studer, Norbert Trautmann and Klaus Wendt

The atomic structure of californium is probed by two-step resonance ionization spectroscopy. Using samples with a total amount of about 2×1010" role="presentation">2×10102×1010 2 × 10 10 Cf atoms (ca. 8.3 pg), ground-state transitions as well as... see more

Alpana Pandey and Ghanshyam Purohit

Triple differential cross section (TDCS) results are reported for the electron impact ionization of nitrogen molecules. The TDCSs have been calculated in distorted wave Born formalism using orientation averaged molecular orbital (OAMO) approximation. The ... see more

Richard Friedberg and Jamal T. Manassah

We review the definition of cooperative Lamb shift originally introduced by ourselves and S. R. Hartmann in 1973. We point out that the definition specified the preparation of a sample of identical two-level atoms prepared with partial excitation by a sho... see more

Harry Ramanantoanina, Anastasia Borschevsky, Michael Block and Mustapha Laatiaoui

The four-component relativistic Dirac–Coulomb Hamiltonian and the multireference configuration interaction (MRCI) model were used to provide the reliable energy levels and spectroscopic properties of the Lr+ + ion and the Lu+ + homolog. The energy spect... see more

Anand K. Bhatia

There have been many observations of the solar and astrophysical spectra of various ions. The diagnostics of these observations require atomic data that include energy levels, oscillator strengths, transition rates, and collision strengths. These have bee... see more

Elmar Träbert

Atomic-level lifetimes span a wide range, from attoseconds to years, relating to transition energy, multipole order, atomic core charge, relativistic effects, perturbation of atomic symmetries by external fields, and so on. Some parameters permit the appl... see more

João D. Rodrigues, Ruggero Giampaoli, José A. Rodrigues, António V. Ferreira, Hugo Terças and José T. Mendonça

Turbulent radiation flow is ubiquitous in many physical systems where light–matter interaction becomes relevant. Photon bubble instabilities, in particular, have been identified as a possible source of turbulent radiation transport in astrophysical object... see more

Subhasish Saha, Sourav Banerjee and Jobin Jose

The present study is devoted to isolate and study the effect of charge migration on the photoionization from the X@C60. The noble gas atoms, Ar, Kr, and Xe, are confined in the C60 to investigate the impact of charge migration from the entrapped atom to t... see more

Himani Tomer, Biplab Goswami and Bobby Antony

This article reports a comprehensive theoretical study of electron scattering from vinyl ether and its isomers. The electron–molecule quantum collision problem is solved through a complex optical potential approach. From the solution of the Schrödinger eq... see more

Alexander Kramida

The present article describes a complete reanalysis of all published data on observed spectral lines and energy levels of the first three spectra of actinium (Ac I–III). In Ac I, three previously determined energy levels have been rejected, 12 new energy ... see more

Jessica Warbinek, Brankica Andelic, Michael Block, Premaditya Chhetri, Arno Claessens, Rafael Ferrer, Francesca Giacoppo, Oliver Kaleja, Tom Kieck, EunKang Kim, Mustapha Laatiaoui, Jeremy Lantis, Andrew Mistry, Danny Münzberg, Steven Nothhelfer, Sebastian Raeder, Emmanuel Rey-Herme, Elisabeth Rickert, Jekabs Romans, Elisa Romero-Romero, Marine Vandebrouck, Piet Van Duppen and Thomas WaltheraddShow full author listremoveHide full author list

RAdiation-Detected Resonance Ionization Spectroscopy (RADRIS) is a versatile method for highly sensitive laser spectroscopy studies of the heaviest actinides. Most of these nuclides need to be produced at accelerator facilities in fusion-evaporation react... see more

Andrea Raggio, Ilkka Pohjalainen and Iain D. Moore

A program of research towards the high-resolution optical spectroscopy of actinide elements for the study of fundamental nuclear structure is currently ongoing at the IGISOL facility of the University of Jyväskylä. One aspect of this work is the developme... see more

Muhammad Aslam Baig

A review of experimental studies of the measurement of the photoionization cross-section for the excited states of the alkali atoms, alkaline earth atoms, and rare-gas atoms is presented, with emphasis on using multi-step laser excitation, ionization, and... see more

Nicola Piovella

A ring of radius ℏk0" role="presentation">???0?k0 ? k 0 in the momentum distribution of a Bose–Einstein condensate is visible when the atoms scatter a single photon. Here, we describe an approximated theory of this effect, leading to an analyt... see more

Stephan Fritzsche

Ions with multiple inner-shell vacancies frequently arise due to their interaction with different targets, such as (intense) light pulses, atoms, clusters or bulk material. They are formed, in addition, if highly charged ions approach surfaces and capture... see more

Gillian Peach, Anthony Eugene Lynas-Gray, Claudio Mendoza, Kenneth T. Taylor and Jonathan Tennyson

Anand K. Bhatia and Joseph Sucher

The amplitude T for ‘free-free’ processes such as bremsstrahlung or photoabsorption by an electron in the continuum in the presence of an external field, is usually written as the matrix element of the radiation operator taken between two continuum states... see more