R-matrix approaches for electron and photon-driven processes in atomic physics
Last updated October 7, 2020 by Alessandro Ferraro
Wednesday, September 23rd 2020, 04:00 PM, Microsoft Teams meeting
Speaker: Kathryn Hamilton (Drake University)
methods have achieved much success in the areas of time-dependent and
time-independent computational atomic physics . Originally
developed to describe nuclear resonances, R-matrix theory has been
extensively applied to the treatment of atomic and molecular physics
problems since the late 1960s. Two of the more recently developed
R-matrix approaches, and the focus of this seminar, are the
time-independent B-spline atomic R-matrix (BSR)  and the R-matrix
with time-dependence (RMT)  methods.
and RMT both offer a fully multielectron treatment of their atomic
target; however, quite often the systems they are applied to can be
adequately described by accounting for the dynamics of only a single
active electron (SAE). In this seminar, I will first discuss their
computational implementation, including making the codes and examples
publicly available through the recently developed Atomic and
Molecular Physics Gateway . Furthermore, I will present a
comparison of results from these sophisticated R-matrix methods and
related SAE approaches when applied to a variety of atomic physics
processes. Specifically, I will concentrate on a recent BSR study of
electron collisions with neutral indium  before discussing the
application of RMT to describe the interaction of short laser pulses
in both the strong-field and perturbative regimes with argon atoms.
P. G. Burke, “R-matrix
theory of atomic collisions: Application to atomic, molecular and
O. Zatsarinny and K. Bartschat, J.
A. C. Brown et
Phys. Comm. 250
K. R. Hamilton et
Rev. A 102
We are a Research Cluster of the School of Mathematics and Physics at Queen’s University Belfast in Northern Ireland. Our research interests are focused primarily on computational and theoretical physics.
The Old Physics Building,
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