Abstract
The atomic orientation generated by polarized‐electron impact excitation of Hg (6s 2) 1S0 → (6s6p) 3P1 is discussed with regard to the so‐called ‘orientation propensity rules’. Experimental results for the orientation parameter J⊥+ as well as existing theoretical predictions employing a five‐state semi‐relativistic R‐matrix (close‐coupling) description and the relativistic distorted‐wave approximation show that the orientation propensity rules are apparently violated if the electron spin is initially down with respect to the scattering plane. The applicability of the propensity rules to electron‐impact excitation of heavy atoms is analyzed within a non‐relativistic description. The observed apparent violation can be attributed to a quantum mechanical interference caused by ‘intermediate coupling’ within the excited state. A re‐evaluation of the data supports the validity of the propensity rules and yields a consistency check of the non‐relativistic approach.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
