Springer eBooks

Photon Polarization Dependence of Superelastic Electron Scattering by Laser-Excited Barium

David F. Register, Sandor Trajmar, S. W. Jensen, Robert T. Poe

Published Jan 1, 1980• 0 citations

Publisher

DOI: 10.1007/978-1-4613-2997-8_51

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Springer eBooks

Photon Polarization Dependence of Superelastic Electron Scattering by Laser-Excited Barium

David F. Register, Sandor Trajmar, S. W. Jensen, Robert T. Poe

Published Jan 1, 1980• 0 citations

Publisher

DOI: 10.1007/978-1-4613-2997-8_51

Related papers

Superelastic electron scattering on the metastable barium atoms

В. І. Марушка, S. Yu. Ugrin, Іван Іванович Шафраньош

Scientific Herald of Uzhhorod University Series PhysicsDec 31, 19980 citations

Laser and ionization excitation transfer by superelastic collisions in atomic vapors

Anne Débarre

Dec 1, 19850 citations

Analysis of collisional alignment and orientation studied by scattering of spin-polarized electrons from laser excited atoms

Ingolf Volker Hertel, Michael H. Kelley, Jabez J. McClelland

Zeitschrift für Physik D Atoms Molecules and ClustersJun 1, 198735 citations

Calculation of the optical pumping parameters for electron-superelastic-scattering experiments from the sodium 3 2 P3/2 level

Peter M. Farrell, W. R. MacGillivray, M. C. Standage

The optical pumping parameters that modify the pure-state pseudo-Stokes parameters in an electron-superelastic-scattering experiment are calculated for the 3 $^{2}$ ${\mathit{S}}_{1/2}$ (F=2)-- ${3}^{2}$ ${\mathit{P}}_{3/2}$ (F) transitions of Na. A QED model is used to describe the laser excitation. It is found, that while the magnitude of the pumping parameter K' associated with circularly polarized excitation is close to unity for other than weak laser intensities, the value of the parameter K, associated with linearly polarized light, differs significantly from unity and is dependent on such experimental conditions as laser intensity, laser detuning, laser beam profile, and the Doppler width of the atomic transition. Methods for measuring K are suggested.The optical pumping parameters that modify the pure-state pseudo-Stokes parameters in an electron-superelastic-scattering experiment are calculated for the 3 $^{2}$${\mathit{S}}_{1/2}$(F=2)--${3}^{2}$${\mathit{P}}_{3/2}$(F) transitions of Na. A QED model is used to describe the laser excitation. It is found, that while the magnitude of the pumping parameter K' associated with circularly polarized excitation is close to unity for other than weak laser intensities, the value of the parameter K, associated with linearly polarized light, differs significantly from unity and is dependent on such experimental conditions as laser intensity, laser detuning, laser beam profile, and the Doppler width of the atomic transition. Methods for measuring K are suggested.

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Influence of a finite scattering volume on the determination of electron-impact coherence parameters

P W Zetner, Sandor Trajmar, George Csanak

Superelastic electron scattering from laser-excited $^{138}\mathrm{Ba}$ (. . .6s6p $^{1}$ P) is investigated both theoretically and experimentally. The theoretical framework is developed and incorporated into a model of a realistic scattering geometry of finite spatial extent. Model calculations predict that the dependence of the superelastic scattering intensity on the linear polarization direction of the laser beam can be severely distorted due to the existence of a finite scattering volume. Our measurements confirm the presence of this distortion and are well described by the model calculations. Conclusions are drawn concerning the influence of this effect on the extraction of electron-impact coherence parameters.Superelastic electron scattering from laser-excited $^{138}\mathrm{Ba}$(. . .6s6p $^{1}$P) is investigated both theoretically and experimentally. The theoretical framework is developed and incorporated into a model of a realistic scattering geometry of finite spatial extent. Model calculations predict that the dependence of the superelastic scattering intensity on the linear polarization direction of the laser beam can be severely distorted due to the existence of a finite scattering volume. Our measurements confirm the presence of this distortion and are well described by the model calculations. Conclusions are drawn concerning the influence of this effect on the extraction of electron-impact coherence parameters.

Physical Review AJun 1, 199036 citations

The optical pumping parameters that modify the pure-state pseudo-Stokes parameters in an electron-superelastic-scattering experiment are calculated for the 3

^{2}

{\mathit{S}}_{1/2}

(F=2)--

{3}^{2}

{\mathit{P}}_{3/2}

(F) transitions of Na. A QED model is used to describe the laser excitation. It is found, that while the magnitude of the pumping parameter K' associated with circularly polarized excitation is close to unity for other than weak laser intensities, the value of the parameter K, associated with linearly polarized light, differs significantly from unity and is dependent on such experimental conditions as laser intensity, laser detuning, laser beam profile, and the Doppler width of the atomic transition. Methods for measuring K are suggested.

Superelastic electron scattering from laser-excited

^{138}\mathrm{Ba}

(. . .6s6p

^{1}

P) is investigated both theoretically and experimentally. The theoretical framework is developed and incorporated into a model of a realistic scattering geometry of finite spatial extent. Model calculations predict that the dependence of the superelastic scattering intensity on the linear polarization direction of the laser beam can be severely distorted due to the existence of a finite scattering volume. Our measurements confirm the presence of this distortion and are well described by the model calculations. Conclusions are drawn concerning the influence of this effect on the extraction of electron-impact coherence parameters.