Mathematics – Probability
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..604..238h&link_type=abstract
CORRELATIONS,POLARIZATION,AND IONIZATION IN ATOMIC SYSTEMS:Proceedings of the International Symposium on(e,2e),Double Photoioniz
Mathematics
Probability
2
Atomic Excitation And Ionization By Electron Impact
Scientific paper
The atomic orientation generated by polarized-electron impact excitation of Hg (6s6p) 3P1 and Pb (6p7s) 3P1 atoms has been studied experimentally using the electron-photon coincidence technique. For both atoms the orientation induced by the collision process shows a significant dependence on the spin projection of the incident electrons. The results are compared with well-established orientation propensity rules and, in the case of mercury, with a five-state Breit-Pauli R-matrix calculation. The Hg data show, in qualitative agreement with the theory, that the propensity rule is apparently violated if the electron spin is initially down. This effect is attributed to a quantum mechanical interference caused by `intermediate coupling' within the excited state. In the Pb case the observation of the decay to Jf=2 allows to extract the spin-flip probability h↑↓ together with J⊥+↑↓, Pl+↑↓ and γ↑↓ when detecting photons perpendicular to the scattering plane. .
Feldmann S.
Geers S.
Hanne G. F.
Herting C.
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