Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Excitation of P 3 ( 2 p ) 2 state of helium by electron impact

Excitation of P 3 ( 2 p ) 2 state of helium by electron impact Close-coupling cross sections for the electron-impact parity-unfavored transition P 3 ( 2 p ) 2 ← S 1 ( 1 s ) 2 in helium are calculated in an integral equation approach. At an energy 0.11 eV above threshold the present formalism yields a cross section of 1.55 × 10 - 4 a 0 2 which is in good agreement with experiment. Our calculated slope at this energy is 6 × 10 - 20 cm 2 /eV against an experimental value of 4 × 10 - 20 cm 2 /eV. The present cross sections satisfy the threshold law for parity-unfavored transitions. A Born-Oppenheimer (BO) calculation is also performed, and it is found that near threshold BO cross sections are too small in comparison with experimental results. The dependence of BO cross sections on the choice of atomic wave functions is also examined. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review A American Physical Society (APS)

Excitation of P 3 ( 2 p ) 2 state of helium by electron impact

Physical Review A , Volume 14 (1) – Jul 1, 1976
8 pages

Loading next page...
 
/lp/american-physical-society-aps/excitation-of-p-3-2-p-2-state-of-helium-by-electron-impact-YYaHbnN0Np

References (0)

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
American Physical Society (APS)
Copyright
Copyright © 1976 The American Physical Society
ISSN
1094-1622
DOI
10.1103/PhysRevA.14.68
Publisher site
See Article on Publisher Site

Abstract

Close-coupling cross sections for the electron-impact parity-unfavored transition P 3 ( 2 p ) 2 ← S 1 ( 1 s ) 2 in helium are calculated in an integral equation approach. At an energy 0.11 eV above threshold the present formalism yields a cross section of 1.55 × 10 - 4 a 0 2 which is in good agreement with experiment. Our calculated slope at this energy is 6 × 10 - 20 cm 2 /eV against an experimental value of 4 × 10 - 20 cm 2 /eV. The present cross sections satisfy the threshold law for parity-unfavored transitions. A Born-Oppenheimer (BO) calculation is also performed, and it is found that near threshold BO cross sections are too small in comparison with experimental results. The dependence of BO cross sections on the choice of atomic wave functions is also examined.

Journal

Physical Review AAmerican Physical Society (APS)

Published: Jul 1, 1976

There are no references for this article.