A N Grum-Grzhimailo and K Bartschat 2001 J. Phys. B: At. Mol. Opt. Phys. 34 L727 doi:10.1088/0953-4075/34/22/104
A N Grum-Grzhimailo1 and K Bartschat2
Show affiliationsNear-threshold electron-impact excitation of the metastable levels (3p54s)3P0 and (3p54s)3P2 of Ar is calculated in a 41-state semi-relativistic R-matrix (close-coupling) approach and the negative-ion resonance structure in the cross sections is analysed. For the first time, angle-differential excitation cross sections of the Ar metastable states at low energies are compared with the available experimental data. Drastic changes in the shape of the excitation functions with scattering angle reflect the contributions of different partial-wave symmetries and negative-ion resonances to the cross section.
34.80.Dp Atomic excitation and ionization
31.15.-p Calculations and mathematical techniques in atomic and molecular physics
Issue 22 (28 November 2001)
Received 23 August 2001, in final form 11 October 2001
Published 9 November 2001
A N Grum-Grzhimailo and K Bartschat 2001 J. Phys. B: At. Mol. Opt. Phys. 34 L727
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