TY - JOUR

T1 - The scattering of 40 eV electrons from magnesium: a polarization correlation study for the 3(1)P state and differential cross sections for elastic scattering and excitation of the 3(1)P and 3(3)P states

AU - Brown, D.O.

AU - Cvejanovic, Danica

AU - Crowe, A.

PY - 2003

Y1 - 2003

N2 - 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 33P states were also measured over the angular range 10°–140° and compared with theoretical predictions.

AB - 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 33P states were also measured over the angular range 10°–140° and compared with theoretical predictions.

U2 - 10.1088/0953-4075/36/16/304

DO - 10.1088/0953-4075/36/16/304

M3 - Article

VL - 36

SP - 3411

EP - 3423

JO - Journal of Physics B: Atomic Molecular and Optical Physics

JF - Journal of Physics B: Atomic Molecular and Optical Physics

SN - 0953-4075

IS - 16

ER -