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The scattering of 40 eV electrons from magnesium: A polarization correlation study for the 31P state and differential cross sections for elastic scattering and excitation of the 31P and 33P states

Lookup NU author(s): Dr Danica Cvejanovic, Emeritus Professor Albert Crowe

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Abstract

Excitation of the 31P state of magnesium by 40 eV electrons has been studied experimentally using the polarized photon-scattered electron correlation method over a wide range of scattering angles (10°-120°). Measured Stokes parameters are consistent with the small angle (≤20°) data of Brunger et al (1989 J. Phys. B: At. Mol. Opt. Phys. 22 1431-32). The measured linear Stokes parameters, and the circular polarization calculated from these parameters, assuming coherent excitation, are generally well produced by recent theoretical models, convergent close coupling, R-matrix with pseudo states, relativistic distorted wave and first-order many-body theory. Despite extensive testing, directly measured circular polarization data yielded low values at most scattering angles beyond 20°. Differential cross sections for elastic scattering and excitation of the 31P and 3 3P states were also measured over the angular range 10°-140° and compared with theoretical predictions.

Publication metadata

Author(s): Brown DO, Cvejanovic D, Crowe A

Publication type: Article

Publication status: Published

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Year: 2003

Volume: 36

Issue: 16

Pages: 3411-3423

ISSN (print): 0953-4075

ISSN (electronic): 1361-6455

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1088/0953-4075/36/16/304

DOI: 10.1088/0953-4075/36/16/304

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