Electron-impact coherence parameters for electron-impact excitation of laser-excited 174Yb (... 6s6p 3P1)

We have measured and calculated the P3 collision Stokes parameter for electron-impact collisional de-excitation to the ytterbium (…6s6p 3P1) level from the higher-lying 1P1, 3D1, 2, 3 and 3S1 levels for 20 eV residual energy. These processes are the time-reverse of the experimentally measured proces...

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Hauptverfasser: Hein, Jeff (VerfasserIn) , Kidwai, S. (VerfasserIn) , Zetner, P. W. (VerfasserIn) , Bostock, C. (VerfasserIn) , Fursa, D. V. (VerfasserIn) , Bray, I. (VerfasserIn) , Sharma, Lalita (VerfasserIn) , Srivastava, R. (VerfasserIn) , Stauffer, A. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 16 March 2011
In: Journal of physics. B, Atomic, molecular and optical physics
Year: 2011, Jahrgang: 44, Heft: 7, Pages: 1-7
ISSN:1361-6455
DOI:10.1088/0953-4075/44/7/075201
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/0953-4075/44/7/075201
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Verfasserangaben:J.D. Hein, S. Kidwai, P.W. Zetner, C. Bostock, D.V. Fursa, I. Bray, L. Sharma, R. Srivastava and A. Stauffer

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520 |a We have measured and calculated the P3 collision Stokes parameter for electron-impact collisional de-excitation to the ytterbium (…6s6p 3P1) level from the higher-lying 1P1, 3D1, 2, 3 and 3S1 levels for 20 eV residual energy. These processes are the time-reverse of the experimentally measured processes, where an impact energy of 20 eV was used to collisionally excite the 3P1 target, prepared by resonant laser pumping. Measurements were performed using a crossed-beam apparatus, where excited-state atomic targets were produced using resonant laser radiation incident on the electron-atom interaction region. Calculations were performed in the relativistic convergent close-coupling, convergent close-coupling and relativistic distorted-wave approximations. The theoretical calculations show that the h electron-impact coherence parameter (EICP) is equal to 1/2, independent of the scattering angle. We use this result to present the L⊥ EICP for the (…6s7s 3S1)→(…6s6p 3P1) collision process. 
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700 1 |a Srivastava, R.  |e VerfasserIn  |4 aut 
700 1 |a Stauffer, A.  |e VerfasserIn  |4 aut 
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