Rozprawy doktorskie na temat „Photoionization”
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Bailey, Stephen Malcolm William. "Relativistic atomic photoionization". Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387976.
Pełny tekst źródłaHudson, C. E. "Photoionization of AlII". Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268922.
Pełny tekst źródłaHockett, Paul. "Photoionization dynamics of polyatomic molecules". Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10857/.
Pełny tekst źródłaWilson, Nigel John. "Inner-shell photoionization and transition probabilities". Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314150.
Pełny tekst źródłaFisher, Barry Owen. "Soft X-ray photoionization of molecules". Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394174.
Pełny tekst źródłaAlshorman, Mohammad. "Studies on K-shell photoionization of nitrogen ions and on valence photoionization of atomic and small molecular ions". Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-00968031.
Pełny tekst źródłaSeabra, Gustavo De Miranda. "Electron propagator theory calculations of photoionization intensities /". Search for this dissertation online, 2005. http://wwwlib.umi.com/cr/ksu/main.
Pełny tekst źródłaHennessy, Michael Joseph. "Photoionization of gases in the Extreme Ultraviolet". Title page, contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09SM/09smh515.pdf.
Pełny tekst źródłaWang, Jing Cheng. "Photoionization and electron-impact ionization of Ar5+". abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3221392.
Pełny tekst źródłaAlna'washi, Ghassan Ali. "Photoionization of Cl-Like K2+ and Ca3+". abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3258836.
Pełny tekst źródłaDonnelly, David. "Inner shell photoionization of atoms and ions". Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361243.
Pełny tekst źródłaField, Thomas A. "Coincidence studies of reaction dynamics". Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318622.
Pełny tekst źródłaRamsbottom, Catherine Anne. "Photoabsorption by atoms and ions". Thesis, Queen's University Belfast, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239229.
Pełny tekst źródłaYu, Chin-hui. "Molecular photoionization calculations using the complex basis function method /". The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487586889187324.
Pełny tekst źródłaMatthews, Sarah Jane. "Near-threshold photodissociation and photoionization of triatomic molecules". Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491378.
Pełny tekst źródłaLi, Hui. "Study on molecular photoionization in femtosecond laser field". Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/15913.
Pełny tekst źródłaDepartment of Physics
Matthias Kling
This thesis consists of two major parts. The first part concerns studies of the orientation dependence of the ionization of diatomic molecules in intense, femtosecond two-color laser fields. The second part is about studies on the ionization mechanisms of the C[subscript]6[subscript]0 molecule in femtosecond near-infrared and ultraviolet laser fields. In the first part, experimental and theoretical results on the asymmetric ion emission of the heteronuclear molecules CO and NO in two-color laser fields are discussed. The two-color fields, which can be tailored by a relative phase, are used to ionize and dissociate CO and NO molecules, both of which are molecules with small polarizabilities. The resulting C[superscript]+, C[superscript]2[superscript]+, N[superscript]+ and O[superscript]+ ions are detected by a velocity map imaging (VMI) setup. The photoelectrons from above-threshold ionization (ATI) of Xe are studied under such a two-color field to assign the phase. For both CO and NO we find that enhanced ionization occurs when the molecule is oriented with the electric field pointing from the C or N atom toward the O atom. This is in agreement with the molecular orbital Ammosov-Delone-Krainov (MO-ADK) theory and the Stark-corrected strong-field-approximation (SFA) calculations. The second part is devoted to the investigation of the ionization mechanism of neutral C[subscript]6[subscript]0 molecules with 30 fs laser pulses at about 800 nm and with 50 fs pulses at about 400 nm. The angular distributions of photoelectrons are measured utilizing VMI. Measurements under different intensities are carried out for the two wavelengths. In our work, thermal electron emission is highly suppressed by the use of short pulses. For near-infrared excitation, photoelectron angular distributions (PADs) that contain six lobes are observed for low energy electrons. This behavior is different from studies for longer pulses of about 120 fs [1]. Further analysis indicates that the PADs might originate from single photon ionization of a super atomic molecular orbital (SAMO), however, a detailed assignment requires further theoretical work. The PADs for the ultraviolet excitation show very similar structures to earlier results [1]. For the near-infrared excitation, we have carried out studies as a function of the chirp of the pulses and find effects on photoelectron spectra and on PADs, which are tentatively explained by sequential multiphoton ionization via “doorway” states.
QUADRI, NICOLA. "THEORETICAL STUDY OF PERTURBATIVE AND NON-PERTURBATIVE PHOTOIONIZATION". Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2918470.
Pełny tekst źródłaJohnson, Alexander Spencer. "Photoionization of atoms in parallel electric and magnetic fields". Thesis, Royal Holloway, University of London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343603.
Pełny tekst źródłaDownie, Peter. "Photoionization of oriented molecules : angle resolved photoelectron photoion coincidence". Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243490.
Pełny tekst źródłaDierking, Christoph Wilhelm Hansjörn Ralf. "Photoionization and vibrational spectroscopy of sodium doped water clusters". Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://hdl.handle.net/11858/00-1735-0000-002E-E608-3.
Pełny tekst źródłaMoretti, Francesco. "A Model Investigation of Photoionization Delay for Atomic Clusters". Thesis, Stockholms universitet, Fysikum, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-159523.
Pełny tekst źródłaLebech, Mogens. "Vector correlations in dissociative photoionization of small polyatomic molecules". Paris 11, 2003. http://www.theses.fr/2003PA112007.
Pełny tekst źródłaDissociative photoionization of small polyatomic molecules, here N20 and CO2, induced by VUV linearly polarized synchrotron radiation is studied using the vector correlation method, in conditions where photoionization leads to one ion, one neutral fragment, and one electron. The vector correlation method consists in measuring the velocity vectors of the photoion and photoelectron produced in each event. The velocity spectrometer combines time-of-flight resolved and position sensitive ion-electron coincidence detection. Ions and electrons are extracted from the interaction zone by a uniform electric field, which ensures a complete collection of both particles. Electrostatic lenses are implemented in the spectrometer in order to increase the velocity vector resolution. The ion-electron kinetic energy correlation derived from the magnitude of the velocity vectors for the coincident events allows one to identify the reaction pathway for each process, in terms of the intermediate N2O+ or CO2+ valence or inner-valence ionic state, or resonant N20** autoionizing state, and the dissociation limit characterized by the electronic states of both fragments and the vibrational distribution of the molecular fragment. The spatial analysis, correlating the two velocities and the polarization axis of the light, determines, for each process, the polar and azimuthal dependence of the molecular frame photoelectron angular distribution, for any orientation of the molecular axis with respect to the polarization axis. The results are presented in terms of four Fij functions which contain the most complete information about the photoionization dynamics for each process: their partial wave analysis gives access to the transition moments. A large number of reactions are identified, and anisotropies in the photoelectron angular distribution in the molecular frame are observed. Selected results obtained for N2O are compared with multichannel Schwinger configuration interaction calculations
Ponzi, Aurora. "Theoretical study of molecular photoionization: diffraction and correlation effects". Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11112.
Pełny tekst źródłaQuesta tesi raccoglie i risultati dell’attività di ricerca del mio dottorato che ha riguardato lo studio di molecole sottoposte a fotoionizzazione e il calcolo delle grandezze dinamiche coinvolte in questo tipo di processo. Una prima linea di ricerca ha seguito la descrizione degli effetti di interferenza e diffrazione nei profili di fotoionizzazione ad alte energie, attraverso un approccio basato sul metodo Density Functional Theory (DFT) accoppiato all’uso di una base di B-spline. Le oscillazioni derivanti da questi effetti di interferenza e diffrazione rappresentano un fenomeno universale, presente in tutte le molecole poliatomiche in esame, dalle biatomiche a quelle più complesse non simmetriche, dalla shell di core a quella di valenza più esterna. Nella regione di core abbiamo analizzato le oscillazioni presenti nel rapporto di intensità C2,3/C1,4 nello spettro di fotoelettone C 1s del 2-butino. Nella regione di valenza più interna abbiamo invece preso in esame gli spettri di fotoionizzazione di semplici molecole poliatomiche (propano, butano, isobutano e cis/trans-2-butene) e i risultati ottenuti sono stati confrontati con quelli sperimentali raccolti presso il sincrotrone Soleil di Parigi. Abbiamo poi analizzato l’effetto dovuto all’emissione coerente da centri equivalenti e quello dovuto alla diffrazione da atomi vicini non equivalenti negli spettri di core e di valenza. Nell’ambito di questa analisi, abbiamo preso in esame acetileni mono e disostituti con fluoro e iodio, comparando i risultati con quelli ottenuti nel caso del più semplice sistema acetilenico. Ci siamo inoltre occupati dello studio di effetti di intereferenza nella ionizzazione di valenza esterna di semplici idrocarburi e, nella stessa regione, abbiamo analizzato come la struttura geometrica di composti permetilati, in particolare la distanza metallo-anello, influenzi i loro profili di fotoionizzazione. Infine, nella regione di valenza interna, sono stati considerati i profili di ionizzazione per il caso di Ar@C60. I risultati sono stati messi a confronto con quelli ottenuti da uno studio precedente sulla molecola di C60. Una seconda linea di ricerca ha invece seguito la descrizione delle osservabili di fotoionizzaione considerando il contributo della correlazione elettronica. Questo può essere fatto attraverso l’implementazione di un formalismo closecoupling dove la funzione del continuo finale è espressa secondo un’espansione analoga a quella Configuration Interaction (CI) per gli stati legati. Il primo livello dell’implementazione ab initio è stato quello di descrivere accuratamente solo la correlazione negli stati legati. A questo scopo, sono stati utilizzati gli orbitali di Dyson. L’uso di questi orbitali è stato applicato alla descrizione delle osservabili di fotoionizzazione nel caso della molecola biatomica CS. Nello spettro di questa molecola è infatti presente un satellite ben risolto dovuto a effetti di correlazione elettronica che non possono essere descritti a livello DFT.
The thesis is focused on the study of the dynamics of photoemission processes for atoms and molecules. A first line of research has followed the description of diffraction and interference effects in the photoionization profiles at high energy for several systems, through an approach based on the DFT method combined with the use of a B-spline basis. These diffraction and interference effects appear in the spectra as a result of wave propagation. The resulting oscillations represent a general phenomenon, present in polyatomic targets, from diatomics to complex non-symmetrical molecules, and from the deep core to the outer-valence shell. Firstly, in the core region, we analysed the oscillations in the intensity ratio C2,3/C1,4 in the carbon 1s photoelectron spectrum for 2-butyne. Then in the inner-valence shell region, the interference effects in the photoionization spectra of simple polyatomic molecules (propane, butane, isobutane and cis/trans-2-butene) were studied and the results have been compared with experimental data collected at the SOLEIL Synchrotron in Paris. Furthermore, we have analysed the effect due to coherent emission from equivalent centers and diffraction from neighbouring non-equivalent atoms in core and valence photoelectron spectra. For this, we investigated mono and disubstituted fluoro- and iodo-acetylenes and compared them to the simple acetylene system. We also focused on interference effects in the outer-valence ionization cross sections of simple hydrocarbons and, in the same shell, we also studied the influence of geometrical structures on photoionization profiles of permethylated compounds. Finally, in the inner-valence shell region, we considered the photoionization profiles for the case of Ar@C60. The results were compared with a previous study on the C60 molecule. A second line of research has followed the correlated description of photoionization observables. We developed a new method based on an ab initio closecoupling formalism. The use of the Dyson orbitals allowed to study the photoemission observables of highly correlated systems. As a first application of this method, we performed highly correlated calculations on the primary ionic states and the prominent satellite present in the outer-valence photoelectron spectrum of CS. Dyson orbitals are coupled to accurate one-particle continuum orbitals to provide a correlated description of energy-dependent cross sections, asymmetry parameters, branching ratios and Molecular Frame Photoelectron Angular Distributions (MFPADs).
XXVII Ciclo
1985
Navea, Juan G. Manzanares Carlos E. "Studies on the application of laser photoionization in supersonic-jets for the generation of intense ionic clusters". Waco, Tex. : Baylor University, 2006. http://hdl.handle.net/2104/4878.
Pełny tekst źródłaElwert, Torsten August Wilhelm Heinrich. "Photoionization models of the diffuse ionized gas in galactic halos". [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970369166.
Pełny tekst źródłaRolles, Daniel. "Scattering and coherence phenomena in the photoionization of small molecules". [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975198572.
Pełny tekst źródłaChen, Yanfeng. "Analysis of Biological Molecules Using Stimulated Desorption Photoionization Mass Spectrometry". Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14620.
Pełny tekst źródłaOnoda, Yugo. "Trapping of Yb+ Loaded through Photoionization in RF Ion Trap". 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/152515.
Pełny tekst źródłaLu, Miao. "Photoionization and electron-impact ionization of multiply charged krypton ions". abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3221392.
Pełny tekst źródłaQuigley, Lisa Maria. "Applications of atomic R-matrix theory to resonances and photoionization". Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388175.
Pełny tekst źródłaZhu, Yang. "Photoionization spectroscopy of high-lying even-parity levels in iron /". The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487686243822878.
Pełny tekst źródłaHabibi, Mustapha. "Photoionization of the cerium isonuclear sequence and cerium endohedral fullerene". abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3355583.
Pełny tekst źródłaHUTH, THOMAS CARL. "ANALYTICAL MASS SPECTROMETRY WITH A SELECTIVE VACUUM ULTRAVIOLET PHOTOIONIZATION SOURCE". Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183916.
Pełny tekst źródłaNemeth, Gregory Richard Alexander James. "Multi-electron dynamics investigated with strong-field tunnelling and XUV photoionization". Thesis, Swansea University, 2011. https://cronfa.swan.ac.uk/Record/cronfa42905.
Pełny tekst źródłaHatherly, P. A. "The multiphoton multiple ionization of molecules". Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234654.
Pełny tekst źródłaMorgan, Ross Alexander. "Resonance enhanced multiphoton ionisation spectroscopy of sulphur containing molecules". Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337177.
Pełny tekst źródłaHowes, Neil Uist Macdonald. "Kinetic and mechanistic studies in atmospheric chemistry using photoionization mass spectrometry". Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/15766/.
Pełny tekst źródłaAshmore, Jonathan P., i n/a. "Laser Cooling and Trapping of Metastable Neon and Applications to Photoionization". Griffith University. School of Science, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060202.153538.
Pełny tekst źródłaMysak, Erin R. Baer Tomas. "Gentle photoionization of organic constituents using vacuum ultraviolet aerosol mass spectrometry". Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,592.
Pełny tekst źródłaTitle from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Chemistry." Discipline: Chemistry; Department/School: Chemistry.
sossah, ayao m. "Photoionization of the Potassium Isoelectronic Sequence: Ca+ and Transition Metal Ions". Digital Archive @ GSU, 2010. http://digitalarchive.gsu.edu/phy_astr_diss/44.
Pełny tekst źródłaDaly, Steven. "Study of the photoionization of chiral molecules using polarized VUV radiation". Thesis, University of Nottingham, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.594763.
Pełny tekst źródłaAshmore, Jonathan P. "Laser Cooling and Trapping of Metastable Neon and Applications to Photoionization". Thesis, Griffith University, 2005. http://hdl.handle.net/10072/367728.
Pełny tekst źródłaThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Science
Full Text
Homan, Mark Eugene. "A krypton VUV photoionization source for gas chromatography and mass spectrometry". Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185223.
Pełny tekst źródłaChatzipetros, Argyrios. "A simple model of above threshold ionization". Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42087.
Pełny tekst źródłaMah, Kelly Robert Lim. "Investigations of resonantly enhanced multiphoton ionizations of atomic mercury and potassium". Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26451.
Pełny tekst źródłaScience, Faculty of
Physics and Astronomy, Department of
Graduate
Zhang, Wenzhu. "Oscillator strengths for photoabsorption and photoionization processes of feron and NO₂ molecules". Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/32006.
Pełny tekst źródłaScience, Faculty of
Chemistry, Department of
Graduate
Chu, Wei-Chun. "Photoionization of the Be Isoelectronic Sequence: Relativistic and Nonrelativistic R-Matrix Calculations". Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/phy_astr_diss/40.
Pełny tekst źródłaYang, Chieh Jen. "New Correlation Effects in Nonrelativistic Atomic Photoionization in the High Energy Limit". Digital Archive @ GSU, 2005. http://digitalarchive.gsu.edu/phy_astr_theses/1.
Pełny tekst źródłaSmith, Derek Robert. "Systematic study of dopants for use in atmospheric pressure photoionization mass spectrometry". Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5649.
Pełny tekst źródłaFanis, Alberto De. "Double photoionization of alkaline earth atoms and photoelectron spectroscopy of reactive intermediates". Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327255.
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