S Nakazaki et al 1997 J. Phys. B: At. Mol. Opt. Phys. 30 L59 doi:10.1088/0953-4075/30/2/005
Theory and practice in low-energy electron excitation of the 
levels of xenon
S Nakazaki
, K A Berrington
, W B Eissner§ and Y Itikawa||
LETTER TO THE EDITOR
This letter concerns low-energy electron excitation from the ground state of xenon 
to the lowest four excited levels (
and 
). We report here on the first results from Breit - Pauli R-matrix theory which investigates coupling to the 6 p and 5 d levels: specifically, in 5-, 15- and 22-level calculations. Differential cross sections at 15 eV are compared with other theories and with experiments. Our present 22-level R-matrix calculation represents the most elaborate on this system to date and gives reasonable agreement with experiments, though some discrepancies remain. We note that perturbative approaches such as recent distorted-wave calculations agree less well with experiments, and we conclude from this and from other evidence that such methods, as currently formulated, are not reliable for describing low-energy scattering from neutral systems. On the other hand, the R-matrix method appears to be capable of systematic improvement via the introduction of further states and pseudostates.
- PACS
- Subjects
- Dates
-
Issue 2 (28 January 1997)
Received 21 October 1996
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Theory and practice in low-energy electron excitation of the levels of xenon
S Nakazaki et al 1997 J. Phys. B: At. Mol. Opt. Phys. 30 L59
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