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Dissertations / Theses on the topic 'Photoionization'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Bailey, Stephen Malcolm William. "Relativistic atomic photoionization." Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387976.

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2

Hudson, C. E. "Photoionization of AlII." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268922.

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3

Hockett, Paul. "Photoionization dynamics of polyatomic molecules." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10857/.

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The work presented in this thesis was carried out with the ultimate aim of learning about the photoionization dynamics of polyatomic molecules. This is a complex problem; in order to obtain sufficient experimental data to shed light on the dynamics careful measurement of photoelectron angular distributions (PADs) is required. Ideally these measurements are rotationally-resolved, and the angular distributions measured correspond to the formation of the molecular ion in a single rotational state. The ionization event, in the dipole approximation, can be completely described by the dipole matrix

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4

Wilson, 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.

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5

Fisher, Barry Owen. "Soft X-ray photoionization of molecules." Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394174.

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6

Alshorman, 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.

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In this thesis work, the K-shell photoionization of multi-charged ions has been studied as well as the valence photoionization of atomic and small molecular ions. The K-shell photoionization cross sections were measured for nitrogen iso-nuclear series, from N+ to N4+ ions using the ion-photon merged beam technique and the valence photoionization cross sections for Xe+ and Kr+ ions and the small molecular ions CO_2^+ and N_2^+ using both the merged beam and ion trap techniques at the SOLEIL synchrotron radiation facility in Saint-Aubin, France. Combination of the two techniques allows for the m

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7

Seabra, Gustavo De Miranda. "Electron propagator theory calculations of photoionization intensities /." Search for this dissertation online, 2005. http://wwwlib.umi.com/cr/ksu/main.

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8

Hennessy, 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.

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9

Wang, 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.

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10

Alna'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.

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11

Donnelly, 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.

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12

Field, Thomas A. "Coincidence studies of reaction dynamics." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318622.

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13

Ramsbottom, Catherine Anne. "Photoabsorption by atoms and ions." Thesis, Queen's University Belfast, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239229.

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14

Yu, 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.

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15

Matthews, 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.

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Multichannel quantum defect theory (MQDT) has been used to simulate the doubleresonant autoionization spectra of HCO, produced following the photodissociation of acetaldehyde (CH3CHO). Vibrational angular momentum has been incorporated into these calculations for the first time. Simulations are produced for HCO involving Rydberg series with up to six quanta of ion-core bending mode (1I2) excitation. The simulation of resonances converging to the (0310) state of HCO+ is compared with our own experimentally recorded spectrum, while all other simulations are compared with spectra recorded by Gran

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16

Li, Hui. "Study on molecular photoionization in femtosecond laser field." Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/15913.

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Master of Science<br>Department of Physics<br>Matthias Kling<br>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-colo

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17

QUADRI, NICOLA. "THEORETICAL STUDY OF PERTURBATIVE AND NON-PERTURBATIVE PHOTOIONIZATION." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2918470.

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Photoionization processes have been examined from a theoretical perspective with the aim of increasing the number of the describable phenomena involved in such processes. This aim has been achieved by the implementation of several algorithms based on the use of B-splines as basis functions to treat both correlation effects and non-perturbative photoionization regime. The first part of the thesis is dedicated to correlation effects within the bound states. Since a standard DFT method does not permit to study any correlation effect, we present a single channel approach that uses Configuration In

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18

Johnson, 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.

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19

Downie, 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.

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20

Dierking, 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.

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21

Moretti, 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.

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22

Lebech, Mogens. "Vector correlations in dissociative photoionization of small polyatomic molecules." Paris 11, 2003. http://www.theses.fr/2003PA112007.

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La photoionisation dissociative de petites molécules polyatomiques, ici N20 et CO2, induite par rayonnement synchrotron VUV polarisé linéairement est étudiée par la méthode des corrélations vectorielles, dans les conditions où la photoionisation conduit à un ion, un fragment neutre et un électron. Celle-ci consiste à mesurer les vecteurs vitesses du photoion et du photoélectron produits par chaque événement. Le spectromètre des vitesses utilise la détection en coi͏̈ncidence de l'ion et de l'électron résolue en temps-de-vol et sensible en position. Les particules chargées sont extraites de la z

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23

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.

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2013/2014<br>Questa 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 f

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24

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.

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25

Elwert, 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.

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26

Rolles, 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.

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27

Chen, Yanfeng. "Analysis of Biological Molecules Using Stimulated Desorption Photoionization Mass Spectrometry." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14620.

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Surface-assisted laser desorption/ionization mass spectrometry (SALDI MS) is a novel technique for direct analysis of organic and biological molecules. Amino acids, dipeptides, and organoselenium compounds were successfully detected by SALDI on carbon and silicon surfaces. Surface effects, solvent effects, temperature effects and pH effects were studied. A possible mechanism of SALDI is proposed based on observed results. In general, stimulated desorption results in neutral yields that are much larger than ion yields. Thus, we have exploited and further developed laser desorption single

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28

Onoda, Yugo. "Trapping of Yb+ Loaded through Photoionization in RF Ion Trap." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/152515.

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29

Lu, 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.

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30

Quigley, 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.

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31

Zhu, 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.

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32

Habibi, 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.

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33

HUTH, THOMAS CARL. "ANALYTICAL MASS SPECTROMETRY WITH A SELECTIVE VACUUM ULTRAVIOLET PHOTOIONIZATION SOURCE." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183916.

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The vacuum ultraviolet molecular hydrogen laser is evaluated as a selective ion source for analytical mass spectrometry of easily-ionized compounds. The types of compounds ionized below the photon energy of 7.8 eV include polynuclear aromatic hydrocarbons, and many amines and nitrogen-containing heterocycles. The latter two categories encompass a large number of pharmaceuticals and drugs of abuse. H₂ laser photoionization produces parent molecular ions only, for all compounds studied thus far. Selectivity of the threshold photoionization process is very high, as compounds within as little as 0

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34

Nemeth, 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.

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35

Hatherly, P. A. "The multiphoton multiple ionization of molecules." Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234654.

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36

Morgan, 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.

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37

Howes, 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/.

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The aim of this thesis is to provide updated, accurate kinetic (and where possible mechanistic) information regarding the oxidation pathways of various volatile organic compounds (VOCs) and trace gas species within the troposphere. The vast majority of the experiments discussed were conducted using a pulsed laser photolysis, photoionization mass spectrometry (PLP-PIMS) set-up, which operated at low pressures (p = 2 Torr). PLP-PIMS is a time-resolved technique can be used to directly monitor multiple species simultaneously and with time; details of this method are found in Chapter II. Initially

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38

Ashmore, Jonathan P., and 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.

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This thesis presents an in-depth study into the characterization and enhancement of a metastable neon laser cooled and trapped atomic beam. The apparatus consists of a standard Zeeman slowed atomic beam loaded into a magneto-optical trap and was designed for applications to electron scattering experiments and photoionization. The efficiency of the metastable neon atomic source was investigated to determine the ideal cathode type for maximum metastable production and optimal atomic beam velocity haracteristics. A series of characterization measurements were performed on the MOT, and the trap vo

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39

Mysak, 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.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2006.<br>Title 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.

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40

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.

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Photoionization cross section calculations are performed for the ground ([Ne]3s23p63d 2D ) and the first two excited ([Ne]3s23p63d 2D and [Ne]3s23p64s 2S ) states of potassium-like transition metal ions (Sc+2, Ti+3, V+4, Cr+5, Mn+6, Fe+7), along with photoionization calculations for K-like Ca+ ions in the ground ([Ne]3s23p64s 2S ) state and the first two excited ([Ne]3s23p63d 2D and [Ne]3s23p63d 2D ) states. The discrete N-electron final state ion system orbitals are generated using the computer program AUTOSTRUCTURE; 24 configurations are included in the configuration-interaction (CI) calc

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41

Daly, 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.

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42

Ashmore, Jonathan P. "Laser Cooling and Trapping of Metastable Neon and Applications to Photoionization." Thesis, Griffith University, 2005. http://hdl.handle.net/10072/367728.

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This thesis presents an in-depth study into the characterization and enhancement of a metastable neon laser cooled and trapped atomic beam. The apparatus consists of a standard Zeeman slowed atomic beam loaded into a magneto-optical trap and was designed for applications to electron scattering experiments and photoionization. The efficiency of the metastable neon atomic source was investigated to determine the ideal cathode type for maximum metastable production and optimal atomic beam velocity haracteristics. A series of characterization measurements were performed on the MOT, and the trap vo

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43

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.

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The use of a coaxial krypton discharge lamp to selectively photoionize samples in a complex matrix is described. The lamp produces a krypton line emission spectrum with available photon energies of 10.0 and 10.6 eV. When used as a photoionization mass spectrometer source, conditions can be created where molecular ions can be produced which do not undergo fragmentation. This effect can greatly simplify spectral interpretation in the case of either direct sample introduction or coelution from a chromatographic column. Mixtures containing 6 to 8 components can be analyzed by direct injection with

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44

Chatzipetros, Argyrios. "A simple model of above threshold ionization." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42087.

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45

Mah, 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.

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Two investigations are reported on the application of resonantly enhanced multiphoton ionization (RMPI) to gaseous mixtures of an atomic vapor and a few Torr of argon. Photon fluxes large enough to ionize atoms by RMPI were produced by focussing down the light from a tunable pulsed dye laser. The irradiances generated were of the order of 500MWcm⁻². Ionization was detected by a voltage biased wire electrode that simply collected the photoelectrons either directly or after some gas multiplication. One investigation was the measurement of the dependence of RMPI processes in mercury on the polari

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46

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.

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Absolute photoabsorption differential oscillator strengths (cross sections) for N Is and 0 Is inner shell excitation and ionization of N0₂ have been derived from the presently obtained high resolution electron energy loss spectra using dipole (e,e) spectroscopy. The N0₂ inner shell differential oscillator strength spectra are in good agreement with multichannel quantum defect theory calculations in both excitation energies and (differential) oscillator strengths. The N0₂ spectra were interpreted with the aid of the calculations. A resonance present in both the N0₂ N Is and 0 Is ionization con

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47

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.

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The photoionization of the beryllium-like isoelectronic series has been studied. The bound state wave functions of the target ions were built with CIV3 program. The relativistic Breit-Pauli R-matrix method was used to calculate the cross sections in the photon energy range between the ionization threshold and 1s24f7/2 threshold for each ion. For the total cross sections of Be, B+, C+2, N+3, and O+4, our results match experiment well. The comparison between the present work and other theoretical works are also discussed. We show the comparison with our LS results as it indicates the importance

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48

Yang, 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.

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The effect of initial state correlation on high-energy dipole photoionization is considered and it is shown that for almost all atomic electron the asymptotic high-energy dependence is E-7/2, and the dominant transition is an ionization plus excitation satellite transition. This is demonstrated in numerical calculations of the photoionization of Ge4p2 1S and Sn 5p2 1S.

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49

Smith, 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.

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Atmospheric pressure photoionization (APPI) is an effective ionization technique for the analysis of low polarity and nonpolar compounds using liquid chromatography/mass spectrometry. Ions are produced through a mechanism which begins with initial photoionization of a primary reagent, termed a "dopant", followed by either proton transfer or charge exchange with the analyte(s). This thesis regards improving the ionization efficiency of APPI by identifying new dopant candidates that can increase the breadth of compounds amenable to APPI, and/or improve the ionization efficiency for compounds tha

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50

Fanis, 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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