Evidence for unnatural-parity contributions to electron-impact ionization of laser-aligned atoms
Authors
Armstrong, G. S. J.Colgan, J.
Pindzola, M. S.
Amami, Sadek
Madison, D. H.
Pursehouse, J.
Nixon, K. L.
Murray, A. J.
Issue Date
2015-09-11
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Show full item recordAbstract
Recent measurements have examined the electron-impact ionization of excited-state laser-aligned Mg atoms. In this work we show that the ionization cross section arising from the geometry where the aligned atom is perpendicular to the scattering plane directly probes the unnatural parity contributions to the ionization amplitude. The contributions from natural parity partial waves cancel exactly in this geometry. Our calculations resolve the discrepancy between the nonzero measured cross sections in this plane and the zero cross section predicted by distorted-wave approaches. We demonstrate that this is a general feature of ionization from p-state targets by additional studies of ionization from excited Ca and Na atoms.Citation
Evidence for unnatural-parity contributions to electron-impact ionization of laser-aligned atoms 2015, 92 (3) Physical Review APublisher
American Physical SocietyJournal
Physical Review AAdditional Links
https://link.aps.org/doi/10.1103/PhysRevA.92.032706Type
Journal articleLanguage
enISSN
1050-29471094-1622
Sponsors
NSF, EPSRC, Royal Society.ae974a485f413a2113503eed53cd6c53
10.1103/PhysRevA.92.032706
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