Determination of Hexadecapole Moments for the 3p⁴(¹D) Core of Argon II Excited in Polarized e^--Ar Collisions

Authors

B. G. Birdsey, University of Nebraska - Lincoln
H. M. Al-khateeb, Jordan University of Science and Technology
Timothy J. Gay, University of Nebraska - LincolnFollow

Date of this Version

2002

Comments

Published in Correlations, Polarization, and Ionization in Atomic Systems, (AIP Conference Proceedings, #604), D.H. Madison and M. Schulz eds. (AIP, New York, 2002). © 2002 American Institute of Physics. Used by permission.

Abstract

We report on measurements of the integrated Stokes parameters of the light emitted from four well-LS coupled states of the 3p⁴(¹D)4p manifold of Aril, following the simultaneous ionization and excitation of neutral argon by polarized electrons. As for all states, the state multipoles of J can be expanded in terms of the total orbital (L ) and the total spin (S) state multipoles. By splitting each L and S state multipole into multipoles for the core and outer electron, we have experimentally obtained for the first time the normalized integrated state multipole of rank 4 (hexadecapole moment) for the 3p⁴(¹D) core of ArII. We will comment on the Rubin-Bederson hypothesis as it pertains to this collision system [G. Csanak et al., Comments At. Mol. Phys. 30, 165 (1994)] as well as elucidate the data analysis techniques used.