27 th International Symposium on Ion‑Atom Collisions
14-16 July 2021 | Organized On-line

The International Symposium on Ion-Atom Collisions (ISIAC) is a biennial satellite of the International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC). As usual, the symposium will cover all ion-atom collision phenomena including excitation, ionisation and charge transfer, from low to relativistic velocities as well as interactions of ions with surfaces, molecules and clusters.

### Local organizer

Faculty of Physics, Babeș-Bolyai University

### Local Organizing Committee

Prof. Ladislau Nagy | Dr. Sándor Borbély | Dr. Ferenc Járai-Szabó | Dr. Katalin Nagy-Póra | Dr. István Tóth

## Presentation submission

Uploaded presentations will be available at a private section of the conference webpage. Your presentation can be uploaded bellow.

### Terms and Conditions

By uploading your contribution you give us your consent to include the uploaded content to a private section of the conference webpage that can be accessed by registered participants only.

Please fill in the presentation submission form with accurate data. When submitting the form you will be warned if mandatory fields are not filled in.

## Announcement

Dear colleague,

You are cordially invited to the 27th International Symposium on Ion-Atom Collisions (ISIAC) organized on-line by the Faculty of Physics of the Babeș-Bolyai University, Cluj, Romania on 14-16 July, 2021 (https://atom.ubbcluj.ro/isiac). ISIAC is a biennial satellite of the International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC). As usual, the symposium will cover all ion-atom collision phenomena including excitation, ionisation and charge transfer, from low to relativistic velocities as well as interactions of ions with surfaces, molecules and clusters.

Unfortunately, this year is not possible to meet in person because of the COVID-19 pandemics. In this situation the International Advisory Committee of ISIAC has decided to organize a virtual meeting.

The program each day will consist of two sessions, shorter than usual, in order to facilitate the participation from all time zones. Beside the invited talks (already listed here) there will be selected a number of contributed talks from the submitted abstracts. There will be contributed talks of 10 minutes (short talks) and of 5 minutes (flash presentations). Poster session (not very effective in the virtual mode) will be organized only, if an important number of high-quality abstracts do not fit into the program.

In order to cover the cost for the technical organization of the meeting, there will be a registration fee, payable on-line by credit card (40 EUR for regular participants, 20 EUR for students). Only registered participants will have the opportunity to present their contribution, and will have their abstracts included into the Abstract book (to be published on the web page of the meeting).

The registration page will open on April 15. Participants with accepted abstracts will be requested to register till June 21, in order to be included into the program.

If you have any questions, please, do not hesitate to contact me.

See you virtually at the meeting,

local chair

Toshiyuki Azuma (RIKEN, Japan)

Manolis Benis (University of Ioannina, Greece)

Amine Cassimi (Centre de Recherche sur les Ions, les Matériaux et la Photonique, France)

Alain Dubois (Sorbonne University, France)

Daniel Fischer (Missouri University of Science and Technology, USA)

Pedro Luis Grande (Universidade Federal do Rio Grande do Sul, Brazil)

Maria Silva Gravielle (Instituto de Astronomia y Fisica del Espacio, Buenos Aires, Argentina)

Xinwen Ma (Chinese Academy of Sciences, China)

Rita Prosmiti (Instituto de Fisica Fundamental, Spain)

Markus Schoeffler (Johann Wolfgang Goethe-Universität, Germany)

Michael Schulz (Missouri University of Science and Technology, USA)

Béla Sulik (Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary)

Lokesh Tribedi (Tata Institute of Fundamental Research, India)

Alexander Voitkiv (Heinrich-Heine-University of Düsseldorf, Germany)

Wania Wolff (Universidade Federal do Rio de Janeiro, Brazil)

Yong Wu (Institute of Applied Physics and Computational Mathematics, China)

## Invited speakers (confirmed)

Gisela A. Bocan (Instituto de Nanociencia y Nanotecnología, Centro Atómico Bariloche, Argentina) Anomalous KCl(001) surface corrugation from fast He diffraction at very grazing incidence

Madhav Dhital (Missouri S&T, Rolla, USA) Study of higher-order contributions to the few-body dynamics of simple atomic systems at a fully differential level

Alain Dubois (Sorbonne University, France) Multi-electron effects in collisions of swift ions and atoms

Junwen Gao (Sichuan University, Chengdu, China) Sinlge and double electron capture in intermediate-energy $\rm{N}^{5+} + \rm{H}_{2}$ collisions

Andreas Jacob (Institute for Theoretical Physics I, Heinrich-Heine-University of Duesseldorf, Germany) Formation of $\bar{\rm{H}}^+$ via radiative and nonradiative attachment of $\rm{e}^+$ to $\bar{\rm{H}}$

Alisher Kadyrov (Curtin University, Australia) Convergent close-coupling approach to ion-atom collisions: recent progress

Max Kircher (Frankfurt University, Germany) A kinematically complete experiment on Compton scattering - Collision physics with photons

Tom Kirchner (York University, Toronto, Canada) Interatomic Coulomb decay in low-energy ion-dimer collisions: a theoretical analysis based on independent-atom-model coupled-channel calculations

Svenja Lohmann (Uppsala University, Sweden and Helmholtz-Zentrum Dresden-Rossendorf, Germany) Ion-electron dynamics studied in a 3D-transmission approach

Alejandra Mendez (Instituto de Astronomía y Física del Espacio, Buenos Aires, Argentina) Underlying scaling rules for the ionization of molecules

Jimmy Rangama (CIMAP-GANIL, Caen, France) Coulomb explosion imaging of carbon monoxide dimers

Nicolas Sisourat (Sorbonne University, France) Ion-atom collisions within helium clusters

Lokesh Tribedi (Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai, India) Electron emission from large biomolecules and radio-sensitizing effect

Pablo de Vera (European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*), Trento, Italy) Electronic interactions of swift ions and their secondary electrons in biologically relevant materials

Wania Wolff (Instituto de Física, Universidade Federal do Rio do Janeiro, Brasil) Complete break-up of methane and ammonia from satellite states

Xiaolong Zhu (Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China) Heavy N+ ion transfer in doubly charged N2Ar van der Waals cluster

## Important dates

Registration opens: April 15, 2021

Abstract submission deadline: May 14, 2021

Abstract acceptance and preliminary program: June 4, 2021

Early registration deadline: June 21, 2021

speakers are requested to register by that date

Final program: July 2, 2021

Late registration deadline: July 9, 2021

## Program

### Wednesday,July 14

1520–1530 ISIAC Opening

Chair: Alain Dubois

1430–1500 INVITEDConvergent close-coupling approach to ion-atom collisions: recent progress

1500–1530 INVITEDSinlge and double electron capture in intermediate-energy $\rm{N}^{5+} + \rm{H}_{2}$ collisions

1530–1600 INVITEDElectronic interactions of swift ions and their secondary electrons in biologically relevant materials

1600–1605 FLASHModelling electron capture in Be ion collisions with hydrogen for charge-exchange spectroscopy

1605–1610 FLASHThe role of charge transfer and complex formation in cation-induced fragmentation of pyridine

1610–1615 FLASHInfluence of surface defects in grazing-incidence fast atom diffraction

1615–1645 Break

Chair: Clara Illescas

1645–1715 INVITEDIon-atom collisions within helium clusters

1715–1745 INVITEDInteratomic Coulomb decay in low-energy ion-dimer collisions: a theoretical analysis based on independent-atom-model coupled-channel calculations

1745–1815 INVITEDStudy of higher-order contributions to the few-body dynamics of simple atomic systems at a fully differential level

1815–1845 Poster session 1 Radiolysis of Valine by keV electrons Energy loss of relativistic charged particles in 2D materials, using the oscillator model Electronic sputtering from $\rm{SiO}_2$ targets Stopping power in heavy atoms, the role of 4f electrons Nonradiative annihilation of a positron on bound electrons Planned laboratory studies of $\rm{N}_2$ reacting with $\rm{H}^{3+}$ isotopologues MDM-Ion Monte Carlo code: swift ion tracks in water to study physical parameters of interest in hadrontherapy

### Thursday,July 15

1400–1430 Poster session 2 Interaction of $\rm{C}^{5+}$ ions with hydrogen atoms Double-to-single ionization ratio for a PAH molecule coronene ($\rm{C}_{24}\rm{H}_{12}$) in fast ion impact Two electron processes in relaxation of Rydberg hollow atoms Atomic physics at HIAF and APEX collaboration Calculation of differential cross sections in proton-hydrogen collisions Absolute total single- and double-electron capture in $\rm{O}^{6+}+(\rm{CO}_2, \rm{CH}_4, \rm{H}_2$ and $\rm{N}_2)$ collisions Interactions and quantum effects on molecular ions' microsolvation process

Chair: Béla Sulik

1430–1500 INVITEDHeavy N+ ion transfer in doubly charged N2Ar van der Waals cluster

1500–1530 INVITEDA kinematically complete experiment on Compton scattering - Collision physics with photons

1530–1600 INVITEDIon-electron dynamics studied in a 3D-transmission approach

1600–1605 FLASHIonization of water under the impact of 250 keV protons and C, O ions with energy of a few MeV/u

1605–1610 FLASHAn experimental apparatus for systematic studies of molecular processes induced by ion and electron irradiation in astrophysical ice analogues

1610–1615 FLASHSecondary ion emission from condensed $\rm{N}_2\rm{O}$ irradiated by MeV heavy ions

1615–1645 Break

Chair: Maria Silva Gravielle

1645–1715 INVITEDComplete break-up of methane and ammonia from satellite states

1715–1745 INVITEDAnomalous KCl(001) surface corrugation from fast He diffraction at very grazing incidence

1745–1800 SHORTSingly differential direct scattering and electron capture cross sections of intermediate energy proton-helium collisions

1800–1815 SHORTOn the quest for projectile coherence

1815–1830 SHORTBinary ridges in the $\rm{O}^+ + \rm{H}_2 \rightarrow \rm{O} + \rm{H}^+ + \rm{H}$ process as a signature of molecular rotation

### Friday,July 16

1400–1430 Poster session 3 Effective single-electron treatment of ion collisions with multielectron atomic targets Interaction of electrons and positrons with protons aligned in one-dimension line Differential cross section of emitted electrons from acenapthene under fast H-like Si ion impact Adsorption energy of Hydrogen and Nitrogen in Tungsten Photon polarizations in two-photon $2s \rightarrow 1s$ transitions in one-electron ions Unusual overproduction of excited hydrogen atoms identified in the $\rm{H}^{3+}$ collisions with tetrahydrofuran State selective charge exchange cross sections in $\rm{Be}^{4+}+\rm{H}(1s)$ collisions

Chair: Xinwen Ma

1430–1500 INVITEDElectron emission from large biomolecules and radio-sensitizing effect

1500–1530 INVITEDCoulomb explosion imaging of carbon monoxide dimers

1530–1600 INVITEDFormation of $\bar{\rm{H}}^+$ via radiative and nonradiative attachment of $\rm{e}^+$ to $\bar{\rm{H}}$

1600–1605 FLASHIonization of alkali atoms during the collisions with polarized metastable helium. Redistribution of the spin polarization

1605–1610 FLASHTransfer ionization cross sections in A+q+He collisions

1610–1615 FLASHNeonization method to calculate multiple ionization cross sections of water molecules by ion impact

1615–1645 Break

Chair: Michael Schulz

1645–1715 INVITEDMulti-electron effects in collisions of swift ions and atoms

1715–1745 INVITEDUnderlying scaling rules for the ionization of molecules

1745–1800 SHORTHydrogen migration in the dissociation of hydrocarbon dications

1800–1815 SHORTShell effects on electron capture to the continuum in MeV/u collisions of deuteron ions with multielectron targets

1815–1830 SHORTFirst observation of RDEC for $\rm{F}^{9,8+}$ ions on graphene

1830–1840 Closing

## Technical details

The meeting will take place on ZOOM platform. There will be one single access link for all sessions during the entire conference and it will be published on the webpage. The access code will be provided to the registered participants by email on Tuesday, 13th July.

All participants should provide to the Zoom client their full name (which will be visible to the other participants of the meeting).

Authors with oral presentations should use the Share screen option of the ZOOM platform.

All speakers, who wish to test screen sharing and presenting in Zoom, are welcome to join a pre-conference Zoom meeting on Tuesday, 13th July between 3 and 4 pm (CET).

All chairs, who wish to discuss the technical details of the session, are welcome to join a pre-conference Zoom meeting on Tuesday, 13th July between 2.30 and 3 pm (CET).

During conference presentations the audience is kindly asked to keep the microphone muted.

The discussion is managed by the Chair of the session. If a participant wants to address a question, the Raise hand button must be clicked either from Reactions menu or from the Participants list.

After each session of Flash presentations there will be Discussion Rooms at the Zoom platform, where the registered participants can discuss with the flash presenters from the session. The links for these discussion rooms will be provided on the web page of the meeting in the program section. The passcode will be sent to each registered participant (the same as for the meeting).

Posters will be available for preview at a private section of the conference webpage. The access will be granted by a username/password combination provided to the registered participants by email on Tuesday, 13th July. Poster discussions take place according to conference program in separate Jitsi meetings. The links will be published below each poster.

Due to the online nature of the poster discussion during which the authors can share their contribution by screen sharing inside discussion rooms, multi-page, presentation-like posters are recommended (ppt or pdf format). The authors of the posters will have the opportunity to upload their contribution through the conference webpage between 6-12 July.