Research Papers in Physics and Astronomy


Date of this Version

September 1997


Published in PHYSICAL REVIEW LETTERS, VOLUME 79, NUMBER 10, SEPTEMBER 1997. Copyright © 1997 The American Physical Society. Used by permission.


Results of a semirelativistic R-matrix calculation are compared with experimental values for light polarizations and alignment parameters of the second excited-state manifolds of neon and krypton following electron impact excitation. The calculations focus on the near-threshold regime, where negative-ion resonances have a significant effect on the atomic alignment. A grouping of the alignment values according to the electronic angular momentum J of the excited state is observed and qualitatively explained by angular momentum coupling considerations.

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