bluuebunny/crossref_metadata_2025_split huggingface dataset:
Energy deposition of highly charged ions transmitted through single layer MoS2
Authors: Creutzburg S , Schwestka J , Inani H , Tripathi M K , Grande P L , Heller R , Klingner N , Niggas A , Kozubek R , Madauß L , Facsko S , Kotakoski J , Schleberger M , Aumayr F , Wilhelm R A 
Published: June 2020

Synopsis
Highly charged ions (HCIs) are an efficient tool for the perforation of suspended 2D materials. Only a fraction of their potential energy is transferred to the atomically thin target during the very short interaction time and is available for pore formation. Charge exchange spectra were measured for highly charged xenon ions transmitted through suspended, single layer MoS2 in order to determine the deposited potential energy available for pore formation. Additionally, charge exchange dependent ion stopping responsible for kinetic sputtering was measured simultaneously.
Electronic reactive collisions in cold ionised media: from mechanisms to new state-to-state cross sections and rate coefficients
Authors: Mezei J Zs , Orbán A , Chakrabarti K , Moulane Y , Epée Epée M D , Motapon O , Talbi D , Schneider I F 
Published: June 2020

Synopsis
The major mechanisms governing the dynamics of electron-driven reactions of molecular cations will be illustrated.
Low energy elastic electron scattering from benzonitrile (C6H5CN)
Authors: Tatreau G , Diaz B , Alharthi F , Zawadzki M , Khakoo M A 
Published: June 2020

Synopsis
We present experimental differential elastic scattering cross sections (DCSs) for low energy electron scattering from benzonitrile along with integral and momentum-transfer cross sections that are determined from these DCSs. The measurements of DCSs are obtained using the relative flow method with helium as the standard gas, in a crossed electron-molecular gas beam arrangement. Our measurements are made at incident electron energies in the range of 1 – 30 eV and scattering angles in the range of (10°-130°).
Negative ion formation in fullerene molecules C44, C74, C100, C124 and C136: determination of their electron affinities
Authors: Msezane A Z , Felfli  
Published: June 2020

Synopsis
Here we investigate through the electron elastic total cross sections (TCSs) calculations the variation of the electron affinity (EA) with the fullerene size from C44 to C136 and contrast their EAs with that of C60. The TCSs are found to be characterized generally by ground, metastable and excited anionic formation during the collisions. The extracted ground state anionic binding energies for C44, C74, C100, C124 and C136 are 3.25eV, 4.03eV, 3.67eV, 3.06 eV and 3.75eV, respectively. These corresponding to the fullerenes EAs demonstrate their wide variation.
Low energy differential elastic electron scattering from trichloromethane
Authors: Diaz B , Tatreau G , Hlousek B , Zawadzki M , Khakoo M A 
Published: June 2020

Synopsis
Experimental differential cross sections for low energy electron scattering from trichloromethane is measured utilizing a crossed electron-molecular beam experiment via the relative flow method, for the incident electron energies in the range of E
0 = 0.5eV-30eV and the scattering angles in the range of θ = 10° – 130°.
Total cross section measurements for electron scattering from tin(IV) chloride (SnCl4)
Authors: Możejko P , Stafanowska-Tur S , Ptasrńska-Denga E , Szmytkowski Cz 
Published: June 2020

Synopsis
Total cross section for electron scattering from SnCl4 molecules has been measured for energies from 0.6 to 300 eV. Obtained results have been compared with total cross sections for electron scattering from other tetrachoride molecules: XCl4 where X=C, Si, Ge.
Electron impact cross sections for H
2, HD and D
2
Authors: Prajapati D , Yadav H , Vinodkumar M , Vinodkumar P C 
Published: June 2020

Synopsis
The demand for electron-impact cross sections has increased tremendously in recent years. There is, however, a special interest in such cross sections for hydrogen molecules and its isotopomers, HD and D
2. We have computed target properties & electron scattering cross sections for H
2, HD and D
2 and discuss different phenomena and their importance.
60 years of attosecond physics at ICPEAC: from collisions to ultrashort pulses
Authors: Burgdörfer Joachim , Lemell Christoph , Tong Xiao-Min 
Published: June 2020

Abstract
The field of attosecond physics has seen an almost explosive growth since the early 2000’s and represents by now an increasing fraction of contributions to the bi-annual series of International Conferences of Photonic, Electronic, and Atomic Collisions (ICPEAC). The latter is anything but a coincidence as many of the underlying concepts of electronic and photonic dynamics are closely intertwined with atomic-scale collision processes. We illustrate this fruitful connection and its implications with the help of a few prototypical examples of current topical interest.
Particle emission from two-dimensional MoS2 induced by highly charged ion impact
Authors: Skopinski L , Ernst P , Herder M , Schleberger M 
Published: June 2020

Synopsis
For many attractive applications of single layer MoS2 such as in optoelectronics e.g., the sample is supported by a substrate. Its importance for the modification through ion irradiation is here experimentally investigated by the analysis of sputtered particle of MoS2 on SiO2 and Au substrates under highly charged ion irradiation. The velocity distribution of the sputtered atoms is less affected by the substrate using highly charged projectiles than using slightly charged ones. Furthermore, we can show that potential sputtering causes additional emission of particles with lower kinetic energy.
Surface chemistry of colloidal surfactant-free gold nanoparticles generated by laser ablation
Authors: Lévy A , De Anda Villa M , Gaudin J , Amans D , Blanchet V , Boudjada F , Bozek J D , Grisenti R E , Lamour E , Laurens G , Macé S , Milosavljević A R , Nicolas C , Papagiannouli I , Patanen M , Prigent C , Robert E , Steydli S , Trassinelli M , Vernhet D 
Published: June 2020

Synopsis
Surface chemistry of gold nanoparticles produced by laser ablation in liquids has been investigated using synchrotron radiation and the X-ray Photoelectron Spectroscopy technique. Thanks to the recorded core-level and valence spectra, combined with a detailed analysis based on Bayesian statistical methods, the oxide presence and its proportion on the nanoparticle surface have been determined.
Photoionization and photofragmentation of singly charged positive and negative Sc3N@C80 endohedral fullerene ions
Authors: Müller A , Martins M , Kilcoyne A L D , Phaneuf R A , Hellhund J , Borovik A , Holste K , Bari S , Buhr T , Klumpp S , Perry-Sassmannshausen A , Reinwardt S , Ricz S , Schubert K , Schippers S 
Published: June 2020

Synopsis
Photoprocesses of the endohedral fullerene ions

Sc

3

N
@

C

80

+

and

Sc

3

N
@

C

80

−

in the gas phase have been experimentally investigated with emphasis on the specific effects of the encapsulated trimetallic nitride cluster Sc3N on the observed reaction yields. Clear evidence of photoexcitation near the Sc L edge is obtained with the dominating contributions visible in the one- and two-electron-removal channels. The experiments are accompanied by model calculations employing density functional theory (DFT).
Characterizing crystalline defects in single Xe nanoparticles from angular correlations of single-shot diffracted X-rays
Authors: Niozu A , Kumagai Y , Nishiyama T , Fukuzawa H , Motomura K , Bucher M , Ito Y , Takanashi T , Asa K , Sato Y , You D , Li Y , Ono T , Kukk E , Miron C , Neagu L , Callegari C , Fraia M Di , Rossi G , Galli D E , Pincelli T , Colombo A , Kameshima T , Joti Y , Hatsui T , Owada S , Katayama T , Togashi T , Tono K , Yabashi M , Matsuda K , Bostedt C , Nagaya K , Ueda K 
Published: June 2020

Synopsis
We performed a wide-angle X-ray scattering experiment of single Xe nanoparticles using an X-ray free electron laser. We developed a novel analysis method that focuses on the angular correlation between plural Bragg spots in single-shot diffraction patterns. The angular correlations of the Bragg spots encode rich structural information and offer an evidence of twinning and stacking faults in Xe nanoparticles.
Plasmons in graphene traversed by relativistic electronic beam with arbitrary trajectories
Authors: Segui S , Gervasoni J L , Akbari K , Mišković Z , Arista N 
Published: June 2020

Synopsis
In this work we study the energy loss of a beam of relativistic electrons impinging on a graphene sheet under oblique incidence. Using several models for the electric conductivity of graphene, we cover a wide range of frequencies of the energy loss spectrum, from the terahertz to the ultraviolet. To describe this spectrum, we consider the contribution of electronic excitations as well as that of transition radiation.
Ionization of pyrimidine molecule induced by proton
Authors: Quinto M A , Monti J M , Rivarola R D 
Published: June 2020

Synopsis
In the present study will be investigated the ionization of isolated pyrimidine molecules induced by ions. The total and differential cross section have been computed with a quantum mechanical method within the continuum distorted wave-eikonal initial state (CDW-EIS) approximation. A comparison with the available data is presented.
Unexpected role of water on the fragmentation of hydrated biomolecule clusters
Authors: Wang E , Ren X , Dorn A 
Published: June 2020

Synopsis
We study the ionization and fragmentation of tetrahydrofuran (THF) and hydrated THF clusters induced by low-energy (65 eV) electron-collision using an (e, 2e + ion) triple coincidence method. The momentum vectors and the kinetic energies for all three final-state charged particles are determined. The ionic fragments are identified from the measured ion time-of-flight spectra. The influence of the water environment on the biomolecule is investigated with the ion fragment correlated binding energy spectra and triple-differential cross sections as well as ab-initio dynamical calculations.
Charge exchange three- and four-body reactions in the presence of a laser field
Authors: Lévêque-Simon K , Hervieux P-A 
Published: June 2020

Synopsis
Cross-sections computation of the formation of antihydrogen’ atoms or ions resulting from two consecutive collisions between positronium atoms and antiprotons is a central issue of GBAR’s experiment. In [2] cross-section calculations using a perturbative approach, have been undertaken, for the charge exchange three- and four-body reactions (1) and (2). In the present study, we investigate the influence of a laser field on these two reactions. We show that under special irradiation conditions, antihydrogen’ atom or ion formation cross-sections may be increased by the presence of the laser field.
Positronium formation in collisions between positrons and Rb, Cs atoms with screened Coulomb interaction
Authors: Ma J , Wang Y C , Li B , Wang Y B 
Published: June 2020

Synopsis
Positronium formation processes in collisions between positrons and Rb, Cs atoms with Debye potentials are studied using the screening approximation model for screening parameters μ=0.00-0.25 at incident energy range 2-60 eV.
Dielectronic recombination rate coefficients for F-like nickel
Authors: Wang S X , Huang Z K , Wen W Q , Wang H B , Xu X , Schippers S , Khan N , Dou L J , Mahmood S , Mao L J , Ma X M , Li J , Tang M T , Yin D Y , Yuan Y J , Yang J C , Chen C Y , Shi Y L , Dong C Z , Ma X , Zhu L F 
Published: June 2020

Synopsis
At the main cooler storage ring (CSRm) of IMP, Lanzhou, we have measured merged-beams rate coefficients for dielectronic recombination (DR) of F-like Ni in the energy range 0-160 eV which comprises all DR resonances associated with ΔN = 0 core excitations. We compare our results with calculations by the flexible atomic code (FAC). Good agreement is found between calculated and measured resonance parameters except for the low-energy 2s 2p6 (2S1/2)61 resonances. In addition, we have also derived plasma rate-coefficients from our data for applications in astrophysics.
Coincident mapping of e+ and e− from free-free pair production in a magnetic toroidal lepton spectrometer
Authors: Hagmann S , Hillenbrand P M , Litvinov Yu A , Spillmann U , Stöhlker Th 
Published: June 2020

Synopsis
We discuss the electron-optical properties of a toroidal magnetic sector spectrometer and its suitablilty for electron-positron pair spectroscopy in relativistic ion-atom collisions in the future HESR storage ring at FAIR. With the simultaneous mapping of electrons and positrons and geometric invariants in the lepton trajectorties this instrument offers a very high efficiency for studies of vector momentum correlation in free-free pair production.
Status of CRYRING@ESR and preparations for first experiments
Authors: Lestinsky M , Andelkovic Z , Bai M , Bräuning-Demian A , Chetvertkova V , Fedotova S , Geithner O , Geithner W , Gorda O , Herfurth F , Kalinin A , Källberg A , Litvinov S , Menz E B , Mohr K , Sanchez R , Stöhlker T , Vorobjev G , Weinrich U 
Published: June 2020

Synopsis
CRYRING was moved from Stockholm to Darmstadt, modernized and integrated into the GSI/FAIR beamline topology behind ESR. As CRYRING@ESR, it will receive and store heavy, highly charged ions from all species the present accelerator chain is capable of producing. An extensive research program on low-energy atomic collisions, spectroscopy and nuclear reactions was proposed. The facility is gradually completing commissioning, ion beams from the local injector branch have already been stored and prototype experiments performed. We present the machine status and highlight some planned experiments.
Towards background-free studies of capture reactions in a heavy-ion storage ring
Authors: Varga L , Blaum K , Davinson T , Glorius J , Jurado B , Langer C , Lederer-Woods C , Litvinov Yu A , Reifarth R , Slavkovská Z , Stöhlker T , Woods P J , Xing Y M 
Published: June 2020

Synopsis
Stored and cooled highly-charged ions offer unprecedented capabilities for precision studies in realm of atomic-, nuclear-structure and astrophysics. In context of the latter, after the successful investigation of the cross section of 96Ru(p,γ) in 2009, in 2016 the first measurement of the 124Xe(p,γ)125Cs reaction was performed at the Experimental Storage Ring (ESR) at GSI.
Characterisation of ion bunches by a single-pass non-destructive charge counter
Authors: Kiffer M , Ringleb S , Stallkamp N , Kumar S , Arndt B , Vogel M , Quint W , Stöhlker Th 
Published: June 2020

Synopsis
We present non-destructive single-pass ion bunch detection and characterisation by measuring the induced image charge in a detection electrode. The presented technique allows direct determination of ion kinetic energy, absolute ion number and spatial ion bunch length. We will show the results of corresponding measurements with bunches of low-energy highly charged ions and discuss the minimum detectable number of charges.
Bright single-cycle terahertz source based on gas cells irradiated by two-color laser pulses
Authors: Liseykina T.V. , Popruzhenko S.V. 
Published: June 2020

Abstract
We study the excitation of electron currents in a transparent cell of sub-millimeter size filled by an atomic gas and illuminated by an intense two-color femtosecond laser pulse. The pulse consists of a strong fundamental component and its second harmonic of low intensity, both circularly polarized. We show that for a sufficiently small 20μm-size interaction volume the plasma oscillation excited by asymmetric ionization is almost spatially homogeneous. This coherent dipole plasma oscillation results in a remarkably efficient conversion of the electron energy into that of radiation emitted in the terahertz frequency domain. Simultaneously, strong quasi-static electric fields of maximal strength Em
≃ 10MV/cm are shown to exist inside the plasma during several hundred femtoseconds after the ionizing two-color laser pulse has gone.
Dissociative electron attachment to SO2 near 7.5 eV resonance and axial-recoil approximation
Authors: Jana Irina , Naskar Sumit , Nandi Dhananjay 
Published: June 2020

Abstract
We present experimental results for dissociative electron attachment to sulfur dioxide near the 7.5 eV resonance. The dissociation channels leading to O−, S− and SO− ions formation have been investigated with a velocity map imaging technique. While the O− and SO− ions formed by dissociative electron attachment show angular distributions characteristic to a combination of A1+B2 symmetry, the S− ions show angular distributions resulting from changes in the orientation of the dissociating bond due to bending mode vibrations implying the failure of axial-recoil approximation.
Many-body-theory calculation of positronium scattering by atomic hydrogen
Authors: Swann A R 
Published: June 2020

Abstract
The recently developed many-body-theory approach for studying low-energy positronium-atom interactions is applied to calculate positronium scattering by atomic hydrogen. Calculations are carried out for the case where the two electrons are in a spin-triplet state. The elastic scattering phase shifts and cross sections are compared with existing coupled-channel, stochastic-variational, and Kohn-variational results, and excellent agreement is obtained.
Dissociative electron attachment to polyatomic molecules
Authors: Wang Xu-Dong , Gao Xiao-Fei , Li Hao , Wu Bin , Tian Shan X 
Published: June 2020

Abstract
Dissociative electron attachment (DEA) to molecule plays a key role in atmosphere, interstellar space and ionization damages of biological tissue. Experimental DEA studies of polyatomic molecules in gas phase provide the dynamics details that are the fundamentals to establish the physicochemical models of the electron-induced reactions in complicated environments. Since 2012, we successively set up two ion-velocity-map-imaging apparatuses, and accomplished a series of experimental studies of the DEA dynamics. Here is a brief review about our progresses on polyatomic molecules.
Negative ion relaxation and reactions in a cryogenic storage ring
Authors: Schmidt H T , Rosén S , Thomas R D , Stockett M H , Geppert W D , Larson Å , Löfgren P , Simonsson A , Källberg A , Reinhed P , Björkhage M , Blom M , Alexander J D , Najeeb P K , Ji M , Kono N , Anderson E K , Eklund G , Kristiansson M K , Hole O M , Hanstorp D , Hartman H , Barklem P S , Grumer J , Hansen K , Gatchell M , Cederquist H , Zettergren H 
Published: June 2020

Abstract
An overview of recent experimental results of studies of negative atomic and molecular ions in the Double ElectroStatic Ion-Ring ExpEriment, DESIREE is given. Metastable level lifetimes in atomic negative ions have been measured by time-dependent laser photodetachment. Rotational relaxation of diatomic anions is studied by near-threshold photodetachment. Spontaneous decays of small metal cluster anions by electron emission and fragmentation is studied with decay-channel specificity. Finally, mutual neutralisation of pairs of negative and positive ions has been investigated with initial and final state selectivity.
Broadband supercontinuum harmonics and isolated utrashort attosecond pulse generation by optimizing three-color laser fields
Authors: Yu H-Y , Jiao Z-H , Zhou X-X , Li P-C 
Published: June 2020

Synopsis
We present an efficient scheme for the generation of broadband supercontinuum harmonics and isolated utrashort attosecond pulse by the optimized three-color laser fileds. The optimized laser pulse is synthesized by three one-color laser pulses with proper relative phases. The broadband supercontinuum harmonics are obtained by solving accurately the time-dependent Schrödinger equation using the time-dependent generalized pseudospectral method. Our scheme proposed produces a broadband supercontinuum spectrum with the photon energies near 0.3 keV. As a result, an isolated 17 as pulse can be obtained directly by superposing the supercontinuum harmonics.
Spin-orbit dynamics in atomic krypton observed through decay of autoionising states
Authors: Wragg J , Armstrong G , Clarke D , Ballance C , Brown A , van der Hart H 
Published: June 2020

Synopsis
We study the spin-orbit interaction within excited states of krypton by extending R-Matrix with time-dependence theory to include spin-orbit effects. We study an attosecond pump-probe scheme where we produce an autoionising state with the probe pulse. We observe dynamics through the subsequent decay of the autoionising state, from which we find a time-dependent signal when spin-orbit interactions are included. We examine the effect of the relative polarisation of the pulses, enabling an interpretation of the dynamics in terms of the quantum number mℓ
of the core of the excited krypton atom.
Many-body calculations of two-photon, two color matrix elements for attosecond delays
Authors: Dahlström M , Ljungdahl A , Sörngård J , Vinbladh J , Lindroth E 
Published: June 2020

Synopsis
Interferometric measurements based on the combination of extreme ultraviolet (XUV) attosecond pulse trains with weak infrared laser fields, have been successfully used to study time-resolved and recently angle-resolved photoemission in various atomic systems. These measurements rely on quantum interference between electron wavepackets created by absorption of XUV radiation, with further absorption or emission of laser photons. Here we present many-body calculations of the full two-photon process.
Signatures of Coriolis effects in molecular bichromatic circularly polarized high-order harmonic generation
Authors: Yuan K J , Bandrauk A D 
Published: June 2020

Synopsis
Circularly polarized high-order harmonic generation in molecules by bicircular pulses has been studied. We describe the laser induced electron dynamics in a rotating frame. The Coriolis effects give rise to orthogonal polarization harmonics. It is found that harmonic property depends on pulse frequencies and helicities, molecular orbital symmetries, and electron localizations, illustrating the importance of the field-molecule symmetry. The feature is described by dynamical symmetry theory and time profile analysis of harmonics.
UV-pump/UV-probe spectroscopy of N2
Authors: Borràs V J , González-Vázquez J , Klinker M , Martín F 
Published: June 2020

Synopsis
UV-pump / UV-probe photoelectron spectra of N2 are theoretically evaluated by solving the time-dependent Schrödinger equation in a basis of all-electron bound and continuum eigenstates provided by the XChem code.
Imaging an isolated water molecule with an attosecond electron wave packet
Authors: Liu X , Amini K , Steinle T , Sanchez A , Shaikh M , Belsa B , Steinmetzer J , Le A T , Moshammer R , Pfeifer T , Ullrich J , Lin C D , Gräfe S , Biegert J 
Published: June 2020

Synopsis
We use laser-induced electron diffraction (LIED) to self-image the molecular structure of an isolated water molecular ion using its own retuning attosecond electron wave packet (EWP). Using LIED’s sub-femtosecond and picometre spatio-temporal resolution imaging capabilities, we observe the symmetric stretching of the O-H and H-H internuclear distances with increasing laser field strength.
Spatial distribution on high-order-harmonic generation of an H2
+ molecule in intense laser fields
Authors: Zhang J , Guo J , Liu X S 
Published: June 2020

Synopsis
High-order-harmonic generation (HHG) for the H2
+ molecule in a 3-fs, 800-nm few-cycle Gaussian laser pulse is investigated by solving the time-dependent Schrödinger equation. The spatial distribution on HHG is demonstrated and the results present the recombination process of the electron with the two nuclei. And there is little possibility of the recombination of the electron with the nuclei around the origin z = 0 a.u. and equilibrium internuclear positions z = ±1.3 a.u.. The electron-nuclear wave packet and ionization probability are investigated to explain the physical mechanism.