Tesis sobre el tema "Mass spectroscopy"
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Massa, D. L. "Discussion: Spectroscopy and Mass-Loss Diagnostics". Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2008/1782/.
Texto completoRogers, Kevin Shaun. "Laser desorption/laser ionization mass spectroscopy". Thesis, University of Salford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357037.
Texto completoLorenz, Martin. "Matrix-isolation spectroscopy of mass-selected ions". [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=962027340.
Texto completoBoyce, Kevin Robert. "Improved single ion cyclotron resonance mass spectroscopy". Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/42551.
Texto completoNatarajan, Vasant. "Penning trap mass spectroscopy at 0.1 ppb". Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/28017.
Texto completoCornell, Eric Allin. "Mass spectroscopy using single ion cyclotron resonance". Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/13562.
Texto completoBagga, Amit. "Femtosecond Laser Mass Spectroscopy of Cyclic Aromatic Hydrocarbons". Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37098.
Texto completoParry, Christopher Mark. "Spectroscopy of neutron deficient mass A=130 nuclei". Thesis, University of York, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313864.
Texto completoCartwright, Peter C. "Mass selective laser photoionisation spectroscopy of copper dimer". Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/13333.
Texto completoHUTH, THOMAS CARL. "ANALYTICAL MASS SPECTROMETRY WITH A SELECTIVE VACUUM ULTRAVIOLET PHOTOIONIZATION SOURCE". Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183916.
Texto completoBiggs, P. "The study of atmospherically important radicals by mass spectroscopy". Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382726.
Texto completoClarke, Nigel J. "Analytical and computational studies in ion trap mass spectroscopy". Thesis, University of Kent, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282487.
Texto completoJuett, Adrienne Marie 1976. "X-ray spectroscopy of low-mass X-ray binaries". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28371.
Texto completoIncludes bibliographical references (p. 125-144).
I present high-resolution X-ray grating spectroscopy of neutron stars in low-mass X-ray binaries (LMXBs) using instruments onboard the Chandra X-ray Observatory and the X-ray Multi-Mirror Mission (XMM-Newton). The first part of this thesis concentrates on results from the subset of LMXBs with orbital periods less than an hour, known as ultracompact binaries. Previous low-resolution X-ray spectra of four systems (4U 0614+091, 2S 0918-549, 4U 1543-624, and 4U 1850-087) all contain a broad residual near 0.7 keV which had been attributed to unresolved line emission. I show that this residual is due to an incorrect model of the intervening photoelectric absorption and can be accounted for by allowing a non-standard Ne/O abundance ratio in the intervening material. I propose that there is neon-rich material local to each binary and that the mass donor is a low-mass, neon-rich degenerate dwarf in an ultracompact binary. Follow-up spectroscopy of 2S 0918-549 and 4U 1543-624 with the High Energy Transmission Grating Spectrometer (HETGS) onboard Chandra and the Reflection Grating Spectrometer onboard XMM confirms the excess neutral neon absorption. Interestingly, the Ne/O ratio of 4U 1543-624 varies by a factor of three between the Chandra and XMMobservations, supporting the suggestion that some of the absorption originates local to the binaries. I also present X-ray spectroscopy of another ultracompact binary, the accretion-powered millisecond pulsar XTE J0929-314. No emission or absorption features are found in the high-resolution spectrum of this source, and the neutral absorption edge depths are consistent with the estimated interstellar absorption. The second part of this thesis uses LMXBs as probes of the interstellar medium (ISM).
(cont.) High-resolution X-ray studies of ISM absorption features can provide measurements of the relative abundances and ionization fractions of all the elements from carbon through iron. X- ray studies also probe the ISM on larger scales than is possible in the optical and ultraviolet wavebands. I present high-resolution spectroscopy of the oxygen K-shell ISM absorption edge in seven X-ray binaries using Chandra. The best-fit model consists of two absorption edges and five Gaussian absorption lines and can be explained by the recent theoretical calculations of K-shell absorption by neutral and ionized atomic oxygen. Significant oxygen features from dust or molecular components, suggested in previous studies, are not required by the Chandra spectra. These measurements also probe large-scale properties of the ISM, placing a limit on the velocity dispersion of the neutral lines of less than 200 km s-1 and constraining the interstellar ratio of O II/O I to approximately 0.1 and the ratio of O III/O I to less than 0.1.
by Adrienne Marie Juett.
Ph.D.
Baturin, Pavlo. "Spectroscopy of Electroproduced Light to Medium Mass Lambda Hypernuclei". FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/249.
Texto completoChen, Haijian. "Automated peak identification for time -of -flight mass spectroscopy". W&M ScholarWorks, 2006. https://scholarworks.wm.edu/etd/1539623489.
Texto completoYu, Zhonghua Walter. "Characterization of irreversible inhibition of proteases by mass spectroscopy". Scholarly Commons, 1995. https://scholarlycommons.pacific.edu/uop_etds/2805.
Texto completoSalter, Tara La Roche. "Metrology for ambient mass spectrometry". Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/28748/.
Texto completoBotonjic, Edita. "Forensic and biological applications of vibrational spectroscopy /". View online ; access limited to URI, 2004. http://wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3160028.
Texto completoJohnston-Theasby, Faye. "Spectroscopy of N-Z nuclei in the mass 80 region". Thesis, University of York, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547359.
Texto completoMoody, Christopher M. "Black writing ink analysis by direct infusion electrospray mass spectroscopy". Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4537.
Texto completoID: 029051039; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.S.)--University of Central Florida, 2010.; Includes bibliographical references (p. 80-82).
M.S.
Masters
Department of Chemistry
Sciences
Forensic Science
Crosland, S. "Qualitative and quantitative aspects of fast atom bombardment mass spectroscopy". Thesis, University of East Anglia, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383683.
Texto completoLeeson, Alistair M. "Time-of-flight secondary ion mass spectroscopy of polymer surfaces". Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268294.
Texto completoNaylor, S. "Applications and mechanistic aspects of fast atom bombardment mass spectroscopy". Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234018.
Texto completoSteele, Iain A. "Photometry and spectroscopy of low mass stars and brown dwarfs". Thesis, University of Leicester, 1994. http://hdl.handle.net/2381/35798.
Texto completoSequeira, Anna J. "Analysis of wood pulp extracts utilizing gas chromatography-mass spectroscopy". Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/39964.
Texto completoPothireddy, Jayanth. "Mass spectroscopy applied to gas leak detection and fuel ionization". [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000880.
Texto completoMarcantonio, Laurence Mark. "Unquenched lattice upsilon spectroscopy". Thesis, University of Glasgow, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341965.
Texto completoRodrigues, Kevin Liu 1990. "Espectroscopia de capacitância de nanoagregados metálicos selecionados em massa = Capacitance spectroscopy of mass selected metal nanoaggregates". [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276934.
Texto completoDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
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Resumo: O estudo de nanopartículas é desafiador devido à complexidade destes sistemas, que estão na interface entre o pequeno e o grande. A física dos sólidos deixa de valer em muitas das partículas menores devido ao alto grau de confinamento, e a fração de átomos de superfície para átomos no núcleo. Devido à natureza pequena dos \textit{clusters}, as medidas realizadas nestes sistemas são medidas de alto grau de precisão. Com o objetivo de caracterizar feixes de fontes de agregados de maneira rápida e acessível, um circuito capacímetro é utilizado para medir a influência da deposição de nanopartículas na região dielétrica de um capacitor, uma proposta em aberto na área de nanopartículas. Como essa medida captura a contribuição de inúmeros agregados diferentes, todos depositados na região dielétrica do capacitor, um filtro seletor de massas pode ser utilizado para estreitar a largura da distribuição de tamanhos e obter a influência causada por esse tamanho específico apenas. Neste trabalho será apresentado o projeto para a implementação de um filtro com esse propósito, original de Issendorf e Palmer, cujo princípio de operação é o tempo de voo das partículas, e tem resolução esperada de uma parte em quarenta. Medidas de capacitância também foram realizadas na tentativa de caracterizar a variação da capacitância em função da quantidade de material depositado, com resultados promissores, mas que requerem um maior refinamento das medidas. Os nanoagregados foram produzidos depositados e analisados no Grupo de Física de Nanossistemas e Materiais Nanoestruturados (GFNMN) da física da Unicamp
Abstract: The study of nanoparticles is a challenging one because of the complexity of these systems, which lie on the interface between the small and the big. By that it is meant that many crystals and solids approximations cease to work, and confinement effects begin to appear, as well as surface phenomena which gain strength as surface to volume atoms increase. Due to the small particle sizes, measurements become increasingly difficult, requiring higher and higher precision techniques. With the objective of quickly characterizing beams produced by nanoaggregates sources, a capacitance measuring circuit was created with the intent of measuring the influence of the aggregates on the dielectric constant of the medium between the electrodes, a technique which has not been applied to cluster beams yet. In combination with the capacitance measurements, a mass selecting device was built in order to make the capacitance measurements reflect only a narrow mass distribution, allowing the study of properties of a single cluster size provided they are small enough. In this study will be discussed the project for such a mass filter, original by Issendorf and Palmer, and its implementation on a cluster source. Its principle of operation is the time of flight mass spectrometry, and its projected resolution of about one part in forty. Capacitance measurements were also performed to try and characterize the capacitance change as a function of the density of deposited material. The results were promissing but require further refinement for a strong correlation. All the particle beams were produced at the cluster source operating at the GFNMN group at the department of applied physics at IFGW Unicamp
Mestrado
Física
Mestre em Física
2011/15018-7
FAPESP
Asad, A. H., L. Morandeau, S. Chan, C. M. Jeffery, S. V. Smith y R. I. Price. "Quality assurance of 61Cu using ICP mass spectroscopy and metal complexation". Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-166486.
Texto completoDale, Vanessa Cordelia Meriel. "The study of cyanobacterial toxins by means of tandem mass spectroscopy". Thesis, University of Warwick, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282458.
Texto completoSimpson, Matthew James. "Ion-molecule reaction mass spectrometry and vacuum-ultraviolet negative photoion spectroscopy". Thesis, University of Birmingham, 2010. http://etheses.bham.ac.uk//id/eprint/1056/.
Texto completoKrauss, Miriam Ilana. "X-ray spectroscopy of neutron star low-mass X-ray binaries". Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/45408.
Texto completoIncludes bibliographical references (p. 133-150).
In this thesis, I present work spanning a variety of topics relating to neutron star lowmass X-ray binaries (LMXBs) and utilize spectral information from X-ray observations to further our understanding of these sources. First, I give an overview of important X- ray astrophysics relevant to the work I present in subsequent chapters, as well as information about the X-ray observatories from which I obtained my data. In the next three chapters, I consider spectra-both high- and low-resolution--of accretion-powered millisecond X-ray pulsars, a unique and relatively new class of objects. In addition to analysis of the pulsar XTE J1814-338, I compare a broader sample of pulsars with a sample of atoll sources in order to better understand why the latter class do not contain persistently pulsating neutron stars. In particular, I test the hypothesis that pulsations in the atoll sources are suppressed by a high-optical- depth scattering region. Using X-ray color-color diagrams to define a selection criterion based on spectral state, I analyze Rossi X-ray Timing Explorer (RXTE) spectra from all the sources, and use a Comptonization model to obtain measurements of their optical depths. I then discuss efforts to spatially resolve X-ray jets from the accretion-powered millisecond pulsar SAX J1808.4-3658 and the Z source XTE J1701-462. Each was observed by the Chandra X-ray Observatory to produce a high-spatial-resolution image. This work was motivated in part by my analysis of XTE J1814-338, which found an apparent excess of infrared flux which could be attributed to jet emission. Next, I discuss the measured temperatures of thermonuclear X-ray bursts. The detection of line features in these bursts, and hence from the surfaces of neutron stars, has been an important goal for high-resolution X-ray spectroscopy. A measurement of the wavelengths of identified line features would yield a measurement of the neutron star's gravitational redshift, which would help constrain current models for the neutron star equation of state.
(cont.) Although such a measurement has been made for one source, other searches have not been able to repeat this measurement. I consider the effects of burst temperature on the formation of discrete spectral features, using a large sample of bursts observed by the RXTE PCA. Finally, I present analysis of high-resolution Chandra HETG spectra of a sample of Galactic LMXBs. High-resolution spectra are able to resolve line features, such as the prominent Ne and O emission lines in the ultracompact X-ray binary 4U 1626-67. They also allow for more precise measurements of photoelectric absorption edges, which can otherwise hinder the determination of continuum spectral components, particularly in the lower-energy spectral regions.
by Miriam Ilana Krauss.
Ph.D.
Majola, Siyabonga Ntokozo Thandoluhle. "Exploring the spectroscopy of vibrational levels in the 160 mass region". Doctoral thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20815.
Texto completoGregory, Paul David. "Mass spectrometry and matrix isolation of high temperature molecules". Thesis, University of Southampton, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261012.
Texto completoGriffin, Jeffrey Cliff. "Decay of mass-separated [superscript]195Bi to levels in [superscript]195Pb : collinear laser spectroscopy on mass-separated neutron-deficient lead isotopes". Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/27319.
Texto completoNwogu, Vincent Ikechukwu. "Electrothermal vaporization sample introduction for inductively coupled plasma atomic emission and inductively coupled plasma mass spectrometry". Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/30762.
Texto completoTutcher, B. "Time-of-flight mass-resolved multiphoton ionisation spectroscopy of simple molecules and radicals". Thesis, University of Bristol, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233113.
Texto completoKarahan, Mehmet Cem. "Laser-assisted secondary ion mass spectroscopy and its applications in practical surface analysis". Thesis, Montana State University, 2004. http://etd.lib.montana.edu/etd/2004/karahan/KarahanM0805.pdf.
Texto completoCanty, James Ignatius. "Investigating the properties of brown dwarfs using intermediate-resolution spectroscopy". Thesis, University of Hertfordshire, 2015. http://hdl.handle.net/2299/15194.
Texto completoRutter, Abigail Victoria. "Improving the management of lung cancer using mass spectrometry and spectroscopy techniques". Thesis, Keele University, 2016. http://eprints.keele.ac.uk/2388/.
Texto completoBraun, Christian [Verfasser]. "Time-resolved photoelectron spectroscopy of mass-selected metal-water clusters / Christian Braun". Konstanz : Bibliothek der Universität Konstanz, 2012. http://d-nb.info/1026847141/34.
Texto completoPan, Changkang. "Characterization of solvent-plasma interactions for inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry". Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/30536.
Texto completoMcMahon, Callie Griggs. "Muscle Strength and Body Cell Mass in Postmenopausal Women". Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/42296.
Texto completoMaster of Science
Towers, Brittany N. "Rapid Quality Assessment of Corn-Based products by Infrared Spectroscopy and Selected Ion Flow Tube Mass Spectroscopy with Multivariate Analysis". The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366368685.
Texto completoCarrott, Michael J. "Supercritical fluid chromatography and spectroscopic detection". Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388419.
Texto completoLi, Ling. "Catalytic methane reformation and aromatization reaction studies via cavity ringdown spectroscopy and time of flight mass spectrometry". Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39707404.
Texto completoLi, Ling y 李凌. "Catalytic methane reformation and aromatization reaction studies via cavity ringdown spectroscopy and time of flight mass spectrometry". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39707404.
Texto completoNelms, Nicholas. "A new determination of the charged pion mass and muon neutrino mass upper limit from exotic atom X-ray spectroscopy". Thesis, University of Leicester, 2002. http://hdl.handle.net/2381/30661.
Texto completoAslan, Evren. "Characterization Of Conducting Polymers Of Ester Linkage Containing Thiophene Derivatives Via Mass Spectroscopy". Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605704/index.pdf.
Texto completoStanja, Juliane. "Synergy of decay spectroscopy and mass spectrometry for the study of exotic nuclides". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-113289.
Texto completo