Electron-impact coherence parameters for electron-impact excitation of laser-excited 174Yb (. . . 6s6p 3P1)
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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 helectron-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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Bostock, Christopher (2010)The calculation of accurate excitation and ionization cross sections for electron collisions with atoms and ions plays a fundamental role in atomic and molecular physics, laser physics, x-ray spectroscopy, plasma physics ...
Hein, J.; Kidwai, S.; Zetner, P.; Bostock, Christopher; Fursa, Dmitry; Bray, Igor; Sharma, L.; Srivastava, R.; Stauffer, A. (2011)We have measured and calculated electron-impact excitation cross sections from thelaser-excited Yb (. . . 6s6p 3P1) level to the higher-lying Yb (. . . 6s6p 1P1), (. . . 6s5d 3D1,2,3)and (. . . 6s7s 3S1) levels at 20 eV ...
Bostock, Christopher (2011)The calculation of accurate excitation and ionization cross sections for electron collisions with atoms and ions plays a fundamental role in atomic and molecular physics, laser physics, x-ray spectroscopy, plasma physics ...