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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
81

Atomisation and recombination reactions of oxygen, hydrogen and deuterium

McLeod, G. G. January 1986 (has links)
No description available.
82

An L² representation of the continuum in heavy particle collisions

Hewitt, Robin Nicholas January 1987 (has links)
This thesis is concerned with the use of L² or square integrable functions as a representation of the electronic continua in ion-atom collisions. An exact representation of the continuum states is considered for comparison. The functions are optimised in an attempt to remove some of the arbitrary features present in such calculations. The original work of this thesis is mainly concerned with the calculation of single electron processes in collisions between He²⁺ ions and neutral lithium atoms. The cross sections for single electron capture were calculated in a close-coupled approximation, using the semi-classical impact parameter method. A maximum of thirty-two atomic orbitals with plane-wave translational factors attached were centred upon the target and projectile. Satisfactory agreement with experimental data is obtained over the He(^2+)laboratory energy range from 8 to 2000 keV. The results show the importance of the continuum over a restricted range of impact energies. The rest of the research is concerned with direct excitation and ionisation in the same collision system and results are given for He²⁺ laboratory energies between 20 and 6000 keV. The calculations used a similar close-coupled approximation with up to sixty-five basis states. The best ionisation cross sections reproduce the experimental data apart from a normalization factor. The excitation results were more sensitive to basis set choice. The ionisation cross sections were also investigated using an exact representation of the continuum states, using the First Born Approximation and a t-matrix approximation in an attempt to improve upon the L² results. The relationship between the present calculations and some previous methods are discussed and suggestions for future work are made. These are the first close-coupled estimates of ionisation for this sytem and show that contributions from target d- and f- states dominate the ionisation cross section around its maximum.
83

Spinabhängige Asymmetriefunktionen in der elastischen und inelastischen Elektron-Cäsium-Streuung bei mittleren Energien

Roth, Bernhard. January 2001 (has links) (PDF)
Bielefeld, Univ., Diss., 2001. / Computerdatei im Fernzugriff.
84

Spinabhängige Asymmetriefunktionen in der elastischen und inelastischen Elektron-Cäsium-Streuung bei mittleren Energien

Roth, Bernhard. January 2001 (has links) (PDF)
Bielefeld, Univ., Diss., 2001. / Computerdatei im Fernzugriff.
85

Zeitabhängige Untersuchungen zu reaktiven Streuprozessen

Morari, Ioan Cristian. January 2001 (has links) (PDF)
Siegen, Univ., Diss., 2001. / Computerdatei im Fernzugriff.
86

Zeitabhängige Untersuchungen zu reaktiven Streuprozessen

Morari, Ioan Cristian. January 2001 (has links) (PDF)
Siegen, Univ., Diss., 2001. / Computerdatei im Fernzugriff.
87

Phasendiffusion und Linienbreite beim Ein-Atom-Maser

Antesberger, Gunter. Unknown Date (has links)
Universiẗat, Diss., 1999--München.
88

Alkali Rydberg states in electromagnetic fields computational physics meets experiment /

Krug, Andreas. Unknown Date (has links)
University, Diss., 2001--München.
89

Untersuchung der Mehrfachionisation von Targetatomen bei hochenergetischen Ion-Atom-Stössen

Werner, Hans-Christian, January 1982 (has links)
Thesis (doctoral)--Freie Universität Berlin. / Description based on print version record.
90

Relativistische Quantendynamik in extrem starken Laserfeldern

Mocken, Guido. January 2005 (has links)
Freiburg (Breisgau), Universiẗat, Diss., 2005. / Dateien in unterschiedlichen Formaten. - Erscheinungsjahr an der Haupttitelstelle: 2004.

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