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Dissertations / Theses on the topic 'Emission and absorption cross sections'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Vemuru, Ajay Sandeep. "Experimental and Theoretical Investigation of Absorption and Emission Cross-Sections in Rare Earth Doped GaN Epilayers." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1219459189.

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2

Martin, Rodica M. "Reciprocity between emission and absorption for rare earth ions in glass." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-042806-110237/.

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Dissertation (Ph.D.)--Worcester Polytechnic Institute.<br>Keywords: homogeneous broadening, McCumber theory, emission and absorption cross sections, rare earth ions, inhomogeneous broadening. Includes bibliographical references (p.171-178).

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3

Horton, Timothy Scott. "COLLISIONAL AND RADIATIVE RELAXATION IN SODIUM DIMER AND ARGON ATOM COLLISIONS." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1480693544113525.

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4

Letzelter, Corinne. "Spectroscopie et photodissociation de la molecule de co : applications astrophysiques." Paris 6, 1987. http://www.theses.fr/1987PA066182.

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Etude des spectres d'absorption et d'emission de la molecule de co et de ses isotopes dans le domaine 88. 5 nm-125 nm. Les sections efficaces d'absorption des bandes de co entre 88. 5 nm et 115 nm ont ete mesurees en utilisant le rayonnement synchrotron comme source lumineuse. La fluorescence a ete observee dans tout le domaine uv et visible et les rendements de flourescence ont ete determines. La section efficace de photodissociation corespondante est calculee en tenant compte d'un eventuel continuum de dissociation pour lequel une limite de la section efficace d'absorption a ete donnee. Pres

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5

LIBRANTZ, ANDRE F. H. "Investigacao dos processos de excitacao multifotonica da configuracao 4fsup(2)5d nos cristais de LiYFsub(4), LuLiFsub(4) e BaYsub(2)Fsub(8) dopados com neodimio trivalente." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11202.

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Made available in DSpace on 2014-10-09T12:49:27Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:01:34Z (GMT). No. of bitstreams: 1 09988.pdf: 6876378 bytes, checksum: 2340a8ae19e74e0088633e68ecefaec3 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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6

BANERJEE, SIDDHARTHA. "OPTICAL PROPERTIES AND POPULATION STATISTICS OF ERBIUM IN OPTICALLY-PUMPED ERBIUM-DOPED ZINC SILICATE GERMANATE WAVEGUIDE AMPLIFIERS." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1100892919.

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7

Bhargava, Prarit. "The ¹²C pion absorption cross sections." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq30446.pdf.

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8

Urdabayev, Nurtay. "Development of Photoreactive Organic Compounds with Large Two-Photon Absorption Cross Sections." Bowling Green State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1148914562.

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9

DeArmond, Fredrick Michael. "Two-Photon Excitation, Fluorescence Microscopy, and Quantitative Measurement of Two-Photon Absorption Cross Sections." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/4036.

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As optical microscopy techniques continue to improve, most notably the development of super-resolution optical microscopy which garnered the Nobel Prize in Chemistry in 2014, renewed emphasis has been placed on the development and use of fluorescence microscopy techniques. Of particular note is a renewed interest in multiphoton excitation due to a number of inherent properties of the technique including simplified optical filtering, increased sample penetration, and inherently confocal operation. With this renewed interest in multiphoton fluorescence microscopy, comes an increased demand for r

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10

Travia, Anderson Dingfelder Michael. "Interaction cross sections needed for simulation of secondary electron emission spectra from thin metal foils after fast proton impact." [Greenville, N.C.] : East Carolina University, 2009. http://hdl.handle.net/10342/1906.

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Thesis (M.S.)--East Carolina University, 2009.<br>Presented to the faculty of the Department of Physics. Advisor: Michael Dingfelder. Title from PDF t.p. (viewed Apr. 23, 2010). Includes bibliographical references.

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11

Kersell, Heath R. "Alternative Excitation Methods in Scanning Tunneling Microscopy." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1449074449.

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12

Ernest, Cheryl Tatum. "High-Resolution Studies of the Ã¹A₂– X̃¹A₁Electronic Transition of Formaldehyde: Spectroscopy and Photochemistry." Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_dissertations/672.

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Formaldehyde (HCHO) plays a primary role in tropospheric chemistry. Its photochemical activity is an important source of radical species such as HCO, H, and subsequently HO2 as well as molecular hydrogen and carbon monoxide. As a source of hydrogen radicals (HOx = OH + HO2), HCHO plays a significant role in the oxidative capacity of the atmosphere, and an important part in the interrelated chemistries of ozone and the HOx and NOx (NO + NO2) cycles. Accurate atmospheric photolysis rates of HCHO are thus required in order to properly model tropospheric chemistry. Despite extensive studies H

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13

Kite, Jason T. "Secondary Electron Production and Transport Mechanisms By Measurement of Angle-Energy Resolved Cross Sections of Secondary and Backscattered Electron Emission from Gold." DigitalCommons@USU, 2006. https://digitalcommons.usu.edu/etd/2089.

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This work provides information about interactions that produce emitted electrons from polycrystalline Au. Emission energy- angle- dependent electron spectra from a polycrystalline Au surface have been measured at several incident electron beam energies. The range of incident energies (~100 eV to 2500 eV) extends from below the first crossover energy, through Emaxo, to above the second crossover energy. The conventional distinction between secondary electrons (SE) (50 eV) is found to be crude for the investigation of electron yields using these energy- angle- resolved measurements. A more reali

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14

Niccolai, Silvia. "Three-body Forces in Photoreactions on 3He." Washington, D.C : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Research ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2003. http://www.osti.gov/servlets/purl/824932-PJ4Kr6/native/.

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Thesis; Thesis information not provided; 1 Feb 2003.<br>Published through the Information Bridge: DOE Scientific and Technical Information. "JLAB-PHY-03-39" "DOE/ER/40150-2763" Silvia Niccolai. 02/01/2003. Report is also available in paper and microfiche from NTIS.

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15

MAEDA, REINALDO de M. "Determinação experimental de parâmetros de física de reatores utilizando refletor de água pesada no reator IPEN/MB-01." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10128.

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Made available in DSpace on 2014-10-09T12:35:04Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:00:44Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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16

Barros, Suelen Fernandes de. "Medida do alinhamento atômico de Ta, W e Au por impacto de elétrons pela distribuição angular dos raios x L." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-14062018-103044/.

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Foram realizadas medidas do alinhamento atômico do Ta, W e Au depois da ionização da subcamada L3 desses elementos por impacto de elétrons, via distribuição angular das linhas de raios x L, empregando alvos finos. As medições foram realizadas na linha de feixe de 10100 keV do Microtron de São Paulo. Os alvos foram confeccionados no Laboratório de Filmes Finos, pela técnica de deposição física de vapor (alvo de Au), e no Laboratório de Materiais Magnéticos, pela técnica de sputtering (alvos de Ta e W), enquanto que a caracterização deles foi realizada no Laboratório de Materiais e Feixes Iônico

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17

Sens, Nicolas. "Développement d'une méthode de type "velocity map imaging" pour la mesure de sections efficaces d’émission d'électrons par des molécules d'intérêt biologique en collision avec des ions." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMC213.

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Ces dernières décennies, l'étude des collisions entre des ions et des molécules d'intérêt biologique a reçu un intérêt croissant en raison des applications en radiobiologie. L'objet de cette thèse est le développement d'un dispositif expérimental en faisceaux croisés spécialement dédié à la mesure de sections efficaces absolues totales, simplement et doublement différentielles (en énergie et/ou en angle) d’émission d’électrons par des molécules d’intérêt biologique. Les électrons émis dans un angle solide de 4π stéradians, suite à la collision entre l’ion projectile et la molécule cible, sont

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18

Ndengue, Steve. "Photodissociation de l'ozone : sélectivité isotopique." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00698322.

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L'anomalie isotopique de l'ozone observée au début des années 1980 a été la première manifestation de fractionnement isotopique indépendant de la masse d'origine chimique. Attribuée au départ, essentiellement au processus de formation de l'ozone, les travaux récents mettent en évidence d'autres contributions telles que la photodissociation. Cette thèse utilise une approche théorique basée sur des calculs ab initio de chimie et dynamique quantique pour déterminer les sections efficaces d'absorption et leurs variations isotopiques. Ces sections efficaces permettent d'étudier la photodissociation

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19

Peng, Zhe, Douglas A. Day, Amber M. Ortega, et al. "Non-OH chemistry in oxidation flow reactors for the study of atmospheric chemistry systematically examined by modeling." COPERNICUS GESELLSCHAFT MBH, 2016. http://hdl.handle.net/10150/614743.

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Oxidation flow reactors (OFRs) using low-pressure Hg lamp emission at 185 and 254 nm produce OH radicals efficiently and are widely used in atmospheric chemistry and other fields. However, knowledge of detailed OFR chemistry is limited, allowing speculation in the literature about whether some non-OH reactants, including several not relevant for tropospheric chemistry, may play an important role in these OFRs. These non-OH reactants are UV radiation, O(<sup>1</sup>D), O(<sup>3</sup>P), and O<sub>3</sub>. In this study, we investigate the relative importance of other reactants to OH for the fat

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20

AL-NEAMI, KADOM ANAM. "Mesure des sections efficaces de production des rayons x : :(l) des elements ::(56)ba, ::(57)la, ::(58)ce par des protons de 1 mev-3,5 mev." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13172.

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Mesures dans des cibles epaisses de sulfates et d'oxydes, dans des cibles minces d'oxydes disposees sur des couches minces de carbone et dans des cibles epaisses de tetraborate de li dope par equiv. A 1% de ba, la ou ce sous forme de sulfate ou d'oxyde. Bon accord avec les previsions theoriques et avec les valeurs experimentales trouvees pour des elements voisins

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21

Anantharajah, Anusanth. "Spectroscopie infrarouge lointain et moyen à haute résolution par transformée de Fourier de molécules complexes d’intérêt atmosphérique : ClNO₂, Cl₂CO et ClONO₂." Electronic Thesis or Diss., Université Paris Cité, 2020. https://theses.md.univ-paris-diderot.fr/ANANTHARAJAH_Anusanth_va2.pdf.

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La mesure des concentrations d’espèces à l’état de trace, susceptibles d’avoir un impact notable sur la santé, le climat ou la stabilité de la couche d’ozone constitue un véritable défi. Les prochaines missions spatiales, prévues à haute sensibilité, apporteront un progrès si et seulement si les paramètres spectraux nécessaires sont disponibles. Pour certaines espèces d’intérêt atmosphérique telles que le chlorure de nitryle (ClNO₂), le phosgène (Cl₂CO) et le nitrate de chlore (ClONO₂), les données spectroscopiques sont incomplètes ou quasiment inexistantes. Le défi dans cette thèse consiste à

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22

TARELHO, LUIZ V. G. "Caracterizacao espectroscopica e dinamica temporal dos processos de transferencia de energia entre os ions Tm sup(3+) - Ho sup(3+) e Yb sup(3+) - Tm sup(3+) em cristais de LiYF sub(4) e LiLuF sub(4)." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10980.

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Made available in DSpace on 2014-10-09T12:46:25Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:57:21Z (GMT). No. of bitstreams: 1 07543.pdf: 4162108 bytes, checksum: fea345edb32c7ebb6b06110c513a47b1 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP<br>FAPESP:95/03214-1

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23

Lin, Wei-Yen, and 林衛彥. "Photochemistry of the Ozone Hole:Ultraviolet Absorption Cross Sections of ClOOCl and Their Temperature Effects." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/84902901361942488788.

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碩士<br>國立臺灣大學<br>化學研究所<br>97<br>Chlorine peroxide (ClOOCl) plays an important role in the formation of the Ozone Hole. The absorption cross section of ClOOCl is a key parameter for determining the polar ozone loss rate. Conventionally, scientists determine the absorption cross sections by photo-absorption method. But all synthesized gas-phase ClOOCl samples contain impurities. Thus, there are large discrepancies in the absorption cross sections of ClOOCl. The new data published by Pope et al. [J. Phys. Chem. A 111, 4322 (2007)] are much smaller than previously accepted values. If Pope’s data ar

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24

Fons, Jhn Thomas. "Determination of xenon emission cross sections and the origin of their anomalous pressure dependence." 1998. http://catalog.hathitrust.org/api/volumes/oclc/40794379.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1998.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 118-120).

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25

Mangoejane, Samuel Seshupo. "Density functional theory studies of O2, H2O, OH- and xanthates adsorption on platinum antimony (PtSb2) surfaces." Thesis, 2020. http://hdl.handle.net/10386/3371.

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Thesis (Ph.D.(Physics)) -- University of Limpopo, 2020<br>The effects of O2, H2O and OH− and collectors are the major factors that determine the flotability behaviour of minerals. In particular, the influence of the chain length variation on xanthate collectors gives rise to increased recovery rates, and are still the most versatile collector for most minerals. This study explores the bonding behaviour, adsorption energies and electronic properties directly related to the reactivity of O2, H2O and OH−, ethyl xanthates (EX), normal propyl-xanthate (nPX), normal-butyl-xanthate (nBX–) and am

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26

Gür, Bilgehan [Verfasser]. "Temperature dependent absorption cross-sections of O3 and NO2 in the 240 - 790 nm range determined by using the GOME-2 satellite spectrometers for use in remote sensing applications / vorgelegt von Bilgehan Gür." 2006. http://d-nb.info/980553806/34.

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27

"Assessing the Impact of H2O and CH4 Opacity Data in Exoplanetary Atmospheres: Laboratory Measurements and Radiative Transfer Modeling Approaches." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.54982.

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abstract: One strategic objective of the National Aeronautics and Space Administration (NASA) is to find life on distant worlds. Current and future missions either space telescopes or Earth-based observatories are frequently used to collect information through the detection of photons from exoplanet atmospheres. The primary challenge is to fully understand the nature of these exo-atmospheres. To this end, atmospheric modeling and sophisticated data analysis techniques are playing a key role in understanding the emission and transmission spectra of exoplanet atmos

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28

Spietz, Peter [Verfasser]. "Absorptionsquerschnitte von in der Photolyse von J2 und O3 und in der Atmosphäre relevanten Jodverbindungen = Absorption cross sections for iodine species of relevance to the photolysis of mixtures of I2 and O3 and for the atmosphere / vorgelegt von Peter Spietz." 2005. http://d-nb.info/980288770/34.

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29

Buch, Felix. "Messung des Emissionsspektrums prompter Photonen bei der Bestrahlung homogener Targets mit Protonen." 2018. https://tud.qucosa.de/id/qucosa%3A34765.

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Die Protonentherapie, welche zur Behandlung von Tumoren mittlerweile weltweit eingesetzt wird, könnte von einem System zur Reichweitekontrolle des Protonenstrahls bedeutend profitieren. Einen Rückschluss auf die Position der Protonen in Echtzeit ermöglicht die prompte Gammastrahlung. Diese Sekundärstrahlung entsteht durch nukleare Wechselwirkungen der Protonen mit den Atomkernen im Gewebe. Derzeit existieren verschiedene Methoden die aus einer Messung der zeitlichen oder räumlichen Verteilung dieser hochenergetischen Photonen versuchen eine Reichweiteinformation zu gewinnen. Die Methoden zur N

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30

Paumo, Hugues Kamdem. "2-Aryl-6,8-Dibromo-4-Chloroquinazoline as scaffold for the synthesis of Novel 2,6,8-Triaryl-4-(Phenylethynyl)Quinazolines with potential photophysical properties." Diss., 2014. http://hdl.handle.net/10500/14197.

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The 2-aryl-6,8-dibromoquinazolin-4(3H)-ones were prepared in a single-pot operation by condensing 6,8-dibromoanthranilamide and aryl aldehydes in the presence of molecular iodine in ethanol. Treatment of the 2-aryl-6,8-dibromoquinazolin-4(3H)-ones with thionylchloride in the presence of dimethylformamide afforded the corresponding 2-aryl-4-chloro-6,8-dibromoquinazolines. Palladium(0)-copper iodide catalysed Sonogashira cross-coupling reaction of 2-aryl-4-chloro-6,8-dibromoquinazolines with terminal alkynes at room temperature afforded series of 2-aryl-6,8-dibromo-4-(alkynyl)quinazolines. Furth

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