Research Papers in Physics and Astronomy

 

Date of this Version

2009

Comments

Published in PHYSICAL REVIEW A 79, 022705 (2009). Copyright ©2009 The American Physical Society. Used by permission.

Abstract

We have measured the linear and circular polarization of 391.4 nm N2+ B 2Σu+(υ’=0) → X2Σg+n=0) P-branch fluorescence produced by spin-polarized electron impact excitation of N2 X1 Σg+(υ=0) ground states. The resulting nonzero values of the circular polarization indicate that spin-rotation coupling, in conjunction with electron exchange excitation, acts to produce oriented rotational angular momenta in the excited molecular state prior to decay.

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