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- W2082005386 abstract "Experimental spectra for excited-state optical collisions between Mg(3p{sup 1}P{sub 1}) atoms and rare-gas atoms are presented. Aligned Mg atoms are produced in the 3p{sup 1}P{sub 1} level by excitation with linearly polarized light. Collisions between the excited metal atoms and Ne or Ar rare-gas atoms are probed in a 1000-cm{sup {minus}1} range in the vicinity of the Mg 3p{sup 1}P{sub 1}{r_arrow}5s{sup 1}S{sub 0} and 3p{sup 1}P{sub 1}{r_arrow}4d{sup 1}D{sub 2} transitions. The probe radiation is linearly polarized either along or perpendicular to the alignment axis, leading to a linear polarization for the optical collision process as a function of detuning of the probe from the atomic resonances. Substantial spectral variation of the linear polarization reflects the different molecular transitions responsible for the excitation process, and the evolution of the atomic alignment into the molecular regime. In the present case, the transitions correspond to excitation from the Mg{endash}rare-gas 3p{sup 1}{Pi}{sub 1} and 3p{sup 1}{Sigma}{sub 0}{sup +} molecular terms to the 5s{sup 1}{Sigma}{sub 0}{sup +}, 4d{sup 1}{Delta}{sub 2}, 4d{sup 1}{Pi}{sub 1}, and 4d{sup 1}{Sigma}{sub 0}{sup +} terms. Experimental details of the approach, and the results obtained, will be described. Discussion of the polarization spectra is made through theoretical modeling focusing on the effectsmore » of the symmetry of the molecular states involved in the process. The modeling employs the semiclassical theory developed earlier. For a range of qualitatively correct interaction potentials and corresponding Condon points for the photo-excitation channels, good agreement between experiment and theoretical estimates is obtained. {copyright} {ital 1997} {ital The American Physical Society}« less" @default.
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- W2082005386 date "1997-09-01" @default.
- W2082005386 modified "2023-09-27" @default.
- W2082005386 title "Polarization-dependent Mg(3p^{1}P_{1}→5s^{1}S_{0}, 4d ^{1}D_{2})–rare-gas-atom excited-state optical collisions: Experiment and theory" @default.
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- W2082005386 doi "https://doi.org/10.1103/physreva.56.2095" @default.
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