131,058 research outputs found
New resonant behavior in the spin resolved photoionization of the rare gas atoms Kr 3d and Xe 4p
No full textKhalil T. New resonant behavior in the spin resolved photoionization of the rare gas atoms Kr 3d and Xe 4p. Bielefeld (Germany): Bielefeld University; 2002.In the first part of this thesis, the transferred spin polarization of resonantly excited Auger electrons of Kr 3d-1 5p photoionized by circularly polarized light was measured. The transferred spin polarization is related to the orientation A10 (and alignment A20) of core holes induced by the primary photoionization process, and to the intrinsic parameters [xi]1 which characterizes the transferred spin polarization of Auger electrons and [alpha]2, the anisotropy parameter which characterizes the angular intensity distribution of Auger electrons. Due to the selection rules of dipole excitation of Kr 3d-1 5p atoms i.e. Ji=1, A10 and A20 are known, [alpha]2 was calculated and measured by Kitajima et al. The calculation of [xi]1 was performed by N. M. Kabachnik and S. Fritzsche.
In the second part of this thesis, the spin polarization of Xe 4p near the ionization threshold was measured to examine the calculations of Cherepkov of contribution of the lowest order nondipole term; the electric-dipole-electric-quadrupole interference terms to the spin polarization of Xe np photoelectrons. The quadrupol matrix elements of the np->[epsilon]f transitions in Xe calculated in RPAE have strong maxima near the ionization threshold. This behaviour is similar to the well-known maxima in the dipole nd->[epsilon]f transitions. These dipole nd->[epsilon]f transitions are responsible for the so-called giant resonances in the total photoionization cross section. They are attributed to the double-well shape of the effective potential for the dipole [epsilon]f partial waves. Both the RPAE non-relativistic calculation from Cherepkov and the relativistic IPA adapted calculation from Derevianko agree qualitatively with the measured nondipole component of electron spin polarization
THE ANOMALOUS FLUORESCENCE OF N,N-DIALKYL-P-CYANOANILINES
No full textPresent address of Omar S. Khalil: School of Chemistry, Rutgers University New Brunswick, New Jersey, 08903.Author Institution: Coates Chemical Laboratories, Louisiana State UniversityAbsorption and luminescence spectra of N,N-dialkyl-p-cyanoanilines in a variety of solvents are reported. Evidences for ``dimer” and ``excimer” formation are provided and the anomalous luminescences of these molecules, which exhibits three distinctly-different fluorescence emissions and two very dissimilar phosphorescence processes, are interpreted
Sadek-Khalil. — Quelques principes généraux de la rééducation du langage ; Ps. Fr. ; 1959 ; n° 1
No full textSadek-Khalil. — Quelques principes généraux de la rééducation du langage ; Ps. Fr. ; 1959 ; n° 1. In: Bulletin de psychologie, tome 14 n°195, 1961. p. 944
Haram el Khalil à Hébron
No full textVincent Hugues. Haram el Khalil à Hébron. In: Comptes rendus des séances de l'Académie des Inscriptions et Belles-Lettres, 64ᵉ année, N. 4, 1920. p. 334
Samir Al-Khalil. Irak, la machine infernale
No full textAbou Diab Khattar. Samir Al-Khalil. Irak, la machine infernale. In: Politique étrangère, n°2 - 1991 - 56ᵉannée. p. 555
Procès-verbal n° 162
No full textBoinet Albert, Fakhry Hussein, Bahgat Ali, Hamdi Khalil. Procès-verbal n° 162. In: Comité de Conservation des Monuments de l'Art Arabe. Fascicule 25, exercice 1908, 1909. pp. 87-91
Procès-verbal n°163
No full textBoinet Albert, Hamdi Khalil, Fakhry Hussein, H. Bacoom. Procès-verbal n°163. In: Comité de Conservation des Monuments de l'Art Arabe. Fascicule 26, exercice 1909, 1910. pp. 1-7
Procès-verbal n°163
No full textBoinet Albert, Hamdi Khalil, Fakhry Hussein, H. Bacoom. Procès-verbal n°163. In: Comité de Conservation des Monuments de l'Art Arabe. Fascicule 26, exercice 1909, 1910. pp. 1-7
Procès-verbal n° 162
No full textBoinet Albert, Fakhry Hussein, Bahgat Ali, Hamdi Khalil. Procès-verbal n° 162. In: Comité de Conservation des Monuments de l'Art Arabe. Fascicule 25, exercice 1908, 1909. pp. 87-91
Procès-verbal n° 161
No full textBoinet Albert, Hamdi Khalil, Maspero Gaston, Mohl Ottmar von. Procès-verbal n° 161. In: Comité de Conservation des Monuments de l'Art Arabe. Fascicule 25, exercice 1908, 1909. pp. 69-73
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