Atomic Collision Theory

The Challenge

• Calculate antihydrogen formation cross sections from antiproton collisions with positronium.
• Calculate electron collisions with the hydrogen molecule H2
• Calculate various ion-atom scattering cross sections

The Solution

Expand the target in an orthogonal Laguerre basis yielding a finite square-integrable description of the target wavefunctions in both the discrete and continuum subspaces. Form close-coupling equations in momentum space of the form T=V+VGT. Expand these in partial waves and solve each partial wave as a large set of linear equations.

The Outcome

These underpin all of our research. We utilise more than 10MSU annually in a variety of CPU and GPU enabled fortran code.

List of Publications

Collisions of antiprotons with excited positronium atoms
M Charlton, HB Ambalampitiya, II Fabrikant, DV Fursa, AS Kadyrov, I Bray
Physical Review A 104 (6), L060803, 2021

All-Order Full-Coulomb Quantum Spectral Line-Shape Calculations
TA Gomez, T Nagayama, PB Cho, MC Zammit, CJ Fontes, DP Kilcrease, …
Physical Review Letters 127 (23), 235001, 2021

Electronic and Vibrational Close-Coupling Method for Resonant Electron-Molecule Scattering
LH Scarlett, I Bray, DV Fursa
Physical Review Letters 127 (22), 223401, 2021

Proton-helium collisions at intermediate energies: Singly differential ionization cross sections
KH Spicer, CT Plowman, IB Abdurakhmanov, SU Alladustov, I Bray, …
Physical Review A 104 (5), 052815, 2021

Effective single-electron treatment of ion collisions with multielectron targets without using the independent-event model
IB Abdurakhmanov, CT Plowman, KH Spicer, I Bray, AS Kadyrov
Physical Review A 104 (4), 042820, 2021

Transport of electrons and propagation of the negative ionisation fronts in indium vapour
S Dujko, J Atić, D Bošnjaković, RD White, P Stokes, KR Hamilton, …
Plasma Sources Science and Technology 30, 115019, 2021

Linear polarization fractions of Fulcher- fluorescence in electron collisions with
LH Scarlett, US Rehill, MC Zammit, K Bartschat, I Bray, DV Fursa
Physical Review A 104 (4), L040801, 2021

Time delay in two-electron photodetachment and tests of fundamental threshold laws
AS Kheifets, I Bray
Physical Review Research 3 (4), 043017, 2021

Positron-impact direct ionization of lithium, sodium and potassium atoms
R Utamuratov, DV Fursa, AS Kadyrov, RI Campeanu, I Bray, …
The European Physical Journal D 75 (10), 1-5, 2021

Integrated total and state-selective cross sections for bare beryllium ion collisions with atomic hydrogen
NW Antonio, CT Plowman, IB Abdurakhmanov, I Bray, AS Kadyrov
Journal of Physics B: Atomic, Molecular and Optical Physics 54 (17), 175201, 2021

Electron energy deposition in molecular hydrogen gas: a Monte-Carlo simulation using convergent close-coupling cross sections
RK Horton, LH Scarlett, MC Zammit, I Bray, DV Fursa
Plasma Sources Science and Technology 30, 115004, 2021

Differential study of proton-helium collisions at intermediate energies: Elastic scattering, excitation, and electron capture
KH Spicer, CT Plowman, IB Abdurakhmanov, AS Kadyrov, I Bray, …
Physical Review A 104 (3), 032818, 2021

A Fully Relativistic Approach to Photon Scattering and Photoionization of Alkali Atoms
A Singor, D Fursa, I Bray, R McEachran
Atoms 9 (3), 42, 2021

Absolute triple differential cross sections for low-energy electron impact ionization of biochemically relevant systems: Water, tetrahydrofuran, and hydrated tetrahydrofuran
J Zhou, E Ali, M Gong, S Jia, Y Li, Y Wang, Z Zhang, X Xue, DV Fursa, …
Physical Review A 104 (1), 012817, 2021

Extraction of Ps-formation cross-sections from single-centre positron-scattering calculations
R Utamuratov, DV Fursa, AS Kadyrov, IB Abdurakhmanov, I Bray
Journal of Physics B: Atomic, Molecular and Optical Physics 54 (9), 095201, 2021

Complete collision data set for electrons scattering on molecular hydrogen and its isotopologues: II. Fully vibrationally-resolved electronic excitation of the isotopologues of …
LH Scarlett, DV Fursa, MC Zammit, I Bray, Y Ralchenko
Atomic Data and Nuclear Data Tables 139, 101403, 2021

Convergent close-coupling calculations of electrons scattering on electronically excited molecular hydrogen
LH Scarlett, JS Savage, DV Fursa, I Bray, MC Zammit, BI Schneider
Physical Review A 103 (3), 032802, 2021

Recommended Cross Sections for Electron–Indium Scattering
KR Hamilton, O Zatsarinny, K Bartschat, MS Rabasović, D Šević, …
Journal of Physical and Chemical Reference Data 50 (1), 013101, 2021

Isotopic and vibrational-level dependence of dissociation by electron impact
LH Scarlett, DV Fursa, J Knol, MC Zammit, I Bray
Physical Review A 103 (2), L020801, 2021

Application of Molecular Convergent Close-Coupling cross sections in a Collisional Radiative model for the triplet system of molecular hydrogen
D Wünderlich, LH Scarlett, S Briefi, U Fantz, MC Zammit, DV Fursa, I Bray
Journal of Physics D: Applied Physics 54 (11), 115201, 2021

Complete collision data set for electrons scattering on molecular hydrogen and its isotopologues: I. Fully vibrationally-resolved electronic excitation of H2 (X1Σg+)
LH Scarlett, DV Fursa, MC Zammit, I Bray, Y Ralchenko, KD Davie
Atomic Data and Nuclear Data Tables 137, 101361, 2021