Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session GM1: Don Madison Memorial Workshop: Don H. Madison's Impact on the Field
9:00 AM–5:00 PM,
Monday, October 9, 2023
Room: Michigan League, Henderson
Chair: Allison Harris, Illinois State University; Sandra Quintanilla, University of North Texas; Mark Zammit, Los Alamos National Laboratory
Abstract: GM1.00006 : Perturbative and non-perturbative methods for electron-impact ionization*
11:05 AM–11:40 AM
Presenter:
James Colgan
(LANL)
Author:
James Colgan
(LANL)
Other, non-perturbative, treatments were also developed that in principle include the electron-electron interaction to all orders. However, these require much larger computational resources and so have only become in widespread use in the last 20 or so years. Some of the more popular approaches include R-matrix methods, convergent close-coupling approaches, and time-dependent close-coupling techniques. Each of these methods solves the Schrodinger equation (each in a different numerical scheme) for the active electrons (normally only two) in the scattering event. While each technique has its own advantages and disadvantages, they have been shown to produce excellent agreement with each other and with experiment for a variety of cross sections for electron ionization of small targets, such as hydrogen (atomic and molecular), helium, and lithium.
This talk will survey the approaches often used in electron-impact ionization calculations and discuss where the various perturbative and non-perturbative methods are most useful. We will also discuss briefly the generation and use of ionization cross sections in plasma modeling and other applications.
*Los Alamos National Laboratory is operated by Triad National Security, LLC for the National Nuclear Security Administration of the U.S. Department of Energy (Contract No. 89233218NCA000001).
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700