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Timothy J. Gay Publications
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Document Type
Article
Date of this Version
2013
Citation
PHYSICAL REVIEW LETTERS 111, 253201 (2013)
DOI: 10.1103/PhysRevLett.111.253201
Abstract
Using H2 and D2 targets, we have measured the polarization of Fulcher-band fluorescence resulting from spin-polarized electron-impact excitation of vibrationally and rotationally resolved d 3Πu→ a 3 ∑g+ transitions for incident electron energies from 14.3 to 28.5 eV. Near threshold, the linear polarization P1 descends from positive values through zero to negative values, indicating a dynamic production of MN = 0 states. The circular polarization P3 is measured to be nonzero, indicating the orientation of rotationally resolved molecular states. For Q-branch transitions, P3 is consistent with theory based on Hund’s case (b) coupling. The R-branch P3 values do not agree with theory equally well, indicating the effect of ∑-symmetry perturbation of the parent d 3Πu+ state.
Comments
Copyright (c) 2013 American Physical Society. Used by permission.