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Dissertations / Theses on the topic 'Ions Ar +'

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Published: 28 May 2022

Last updated: 30 July 2025

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1

JACQUET, LECLER EMMANUELLE. "Captures electroniques lors des collisions a basse energie entre des ions ar#8#+, kr#8#+, ar#7#+ et une cible de lithium." Caen, 1994. http://www.theses.fr/1994CAEN2003.

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Nous avons etudie les collisions a basse energie entre un faisceau d'ions multicharges (ar#8#+, kr#8#+ et ar#7#+) et une cible d'atomes de lithium par spectroscopie de photons entre 200 et 600 nm. De nouveaux resultats spectroscopiques ont ete obtenus. Les structures fines de nombreux termes du kr viii ont ete mesurees, nous observons en particulier que les structures fines des termes n#2f (n=5 a 7) sont negatives. L'importance des interactions entre les configurations 3snl (n=6 a 10) et les configurations doublement excitees 3pnl (n=4 et 5) et 3d4l de l'arvii ont ete mises en evidence. Les se

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2

Blumenfeld, Yorick. "Collisions périphériques d'ions lourds induites par ⁴⁰ Ar aux énergies intermédiaires : résonances géantes, structures à haute énergie et fragmentation du projectile." Paris 11, 1987. http://www.theses.fr/1987PA112405.

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Ce travail a pour objet l'étude des réactions nucléaires périphériques induites par 40Ar aux énergies intermédiaires. Les résultats obtenus dans des études analogues effectuées à des énergies incidentes plus faibles sont tout d'abord rappelés. Le spectromètre à temps de vol conçu et construit pour les expériences est ensuite présenté. Ses performances permettent une excellente séparation en masse et en charge des produits de réaction et une bonne résolution en énergie. Une étude des propriétés des fragments du projectile montre de nombreuses déviations par rapport au modèle de fragmentation va

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3

Abbas, Isam Ahmed. "Electron detachment cross-section of bromine negative ions in (He, Ne, Ar, Kr and Xe)." Thesis, University of Ottawa (Canada), 1985. http://hdl.handle.net/10393/4648.

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4

Gadi-Dayras, Fatma Zohra. "Étude des mécanismes conduisant à la "fragmentation" du projectile dans les réactions ⁴⁰ Ar + nat Ag à 30 MeV et 60 MeV par nucléon." Paris 11, 1988. http://www.theses.fr/1988PA112223.

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Ce travail est une contribution à l'étude des mécanismes conduisant à la fragmentation du projectile dans les collisions entre ions lourds aux énergies intermédiaires (moins de 100 MeV par nucléon). Contrairement à ce que laissait prévoir certains calculs théoriques,des mesures inclusives des fragments du projectile et des mesures de corrélations entre ces fragments et ceux de la cible dans les réactions ⁴ ⁰ Ar + NatAg à 30 MeV et à 60 MeV par nucléon ne font apparaître aucune différence notoire susceptible d'indiquer un changement de mécanisme entre ces deux énergies. Les corrélations (angula

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5

Andreev, A. A., V. N. Voevodin, O. V. Sobol, et al. "Effect of Ion Irradiation on the Structural State of the Vacuum-Arc Nitride Coatings." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35134.

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The effect of irradiation with ions Ar+ (energy of 1 MeV and 1.8 MeV) and He (energy of 0.6 MeV) on the structure and mechanical properties of the vacuum-arc nitride coatings. It is shown that the level of exposure to radiation materials can be divided into 3 classes: a) “the most persistent” - significant changes occur only on the substructure level (as an example - multi-element system Ti-Zr-V-Hf-Nb-Ta-N), b) “the medium resistance “- significant changes occur in the macro stress-strained state (as an example - the system Ti-N), c) “structural variable” – significant changes in the mac

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6

Thiphagne, Anne. "Etude de l'émission des fragments quasi-projectiles produits dans des réactions induites par des ions ⁴⁰Ar à 60 MeV/nucléon." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37610281z.

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7

Mogo, César. "Cooling ions and molecules and thermodynamical equilibria in a 22-pole trap." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-62832.

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Two gas-phase ion-molecule reaction systems are presented here based on measurements done in a temperature variable 22-pole trapping machine. In the ﬁrst case, the proton afﬁnity of methane is determined based on a new technique for measuring the equilibrium constant of the HCO2+ + CH4 <=> CH5+ + CO2 reaction. The second case reports to the (Ar + N2 )+ reaction system, with reaction rate temperature dependencies measurements made both in the forward and reverse direction with different and complementary methods. The temperature variable 22-pole trapping machine allows one to determine equilibr

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8

Germain, Marie. "Émission hors équilibre de protons dans les réactions Ar + Ta et Xe + Sn aux énergies intermédiaires." Nantes, 1997. http://www.theses.fr/1997NANT2089.

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Les effets hors equilibre dans les collisions d'ions lourds aux energies intermediaires contribuent de facon determinante a la dynamique des collisions. Nous presentons d'abord une mesure inclusive de l'emission de protons emis a grand moment transverse dans la reaction ar + ta a 94 mev/a. Cette mesure se proposait de verifier l'hypothese de production de kaons sous le seuil par des collisions nucleon-nucleon incoherentes, mais egalement d'etudier la possibilite d'un declenchement par des protons de grande energie pour une experience dediee a la multifragmentation froide avec le multidetecteur

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9

Silva, José Domingos Santos da. "Caracterização de espécies orgânicas e inorgânicas presentes no material particulado atmosférico da Baía de Todos os Santos e Salvador - Bahia." Instituto de Química, 2014. http://repositorio.ufba.br/ri/handle/ri/16492.

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Submitted by Ana Hilda Fonseca (anahilda@ufba.br) on 2014-10-31T12:34:38Z No. of bitstreams: 1 José Domingos Silva.pdf: 6734377 bytes, checksum: f73c76a993aedb30d1eb50d2be3386a5 (MD5)<br>Approved for entry into archive by Fatima Cleômenis Botelho Maria (botelho@ufba.br) on 2014-10-31T13:14:52Z (GMT) No. of bitstreams: 1 José Domingos Silva.pdf: 6734377 bytes, checksum: f73c76a993aedb30d1eb50d2be3386a5 (MD5)<br>Made available in DSpace on 2014-10-31T13:14:52Z (GMT). No. of bitstreams: 1 José Domingos Silva.pdf: 6734377 bytes, checksum: f73c76a993aedb30d1eb50d2be3386a5 (MD5)<br>CNPq<br>Fora

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Mousselmal, Moussa. "Étude des ions positifs simplement et doublement chargés d'espèces atomiques (Xe, Kr, Ar) et moléculaires (O₂,HCl, CO₂, CS₂, COS) par spectroscopie de double transfert de charge." Paris 11, 1987. http://www.theses.fr/1987PA112379.

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Nous avons mesuré les distributions d'énergie cinétique des ions H- formés lors de la collision de protons de 2 à 9 keV d'énergie sur des atomes (Xe, Kr, Ar) et des molécules diatomiques (02, HCℓ) et triatomiques (C02, CS2, COS). Les ions négatifs H- peuvent être formés en une seule étape par double transfert de charge ou en deux étapes successives de simple transfert de charge. Le premier processus nous intéresse plus particulièrement L'analyse du bilan d'énergie permet de remonter à l'énergie d'arrachement des deux électrons de la cible, autrement dit aux énergies d'ionisation double de la c

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11

Mousselmal, Moussa. "Etude des ions positifs simplement et doublement chargés d'espèces atomiques (Xe, Kr, Ar) et moléculaires (O, HCl, CO, CS, COS) par spectroscopie de double transfert de charge." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376082287.

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12

Khalal, Mehdi Abdelbaki. "Photoionisation multiple des vapeurs métalliques Multi-electron coincidence spectroscopy: Triple Auger decay of Ar 2p and 2s holes 4d -inner-shell ionization of Xe+ ions and subsequent Auger decay." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS552.

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Ce travail de thèse porte sur l’étude expérimentale des processus de photoionisation multiple de vapeurs alcalines par rayonnement synchrotron. Je me suis intéressé particulièrement à la désexcitation par déclin Auger des atomes ionisés en couche interne. Le dispositif expérimental HERMES mis au point par l’équipe est un spectromètre par temps de vol de type bouteille magnétique qui permet de détecter en coïncidence tous les électrons émis lors du processus d’ionisation (photoélectrons) et de relaxation (électrons Auger). Une partie importante de ma thèse a été consacrée à l’améliorer pour per

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13

GOSSELIN, ANNIE. "Mise au point d'une source d'ions de recul pompee par ganil-sme en vue d'etudier des collisions ions-atomes a tres base energie : application aux collisions ar#8#++he." Caen, 1993. http://www.theses.fr/1993CAEN2006.

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Dans le but d'etudier les collisions ions-atomes a basse energie, nous avons realise une source d'ions de recul. Ces ions de recul sont produits par impact de faisceaux issus de la sortie moyenne energie du ganil sur une cible gazeuse. Un dispositif electrostatique et magnetique permet d'extraire, de guider et de selectionner ces ions de recul. Nous indiquons la facon d'operer afin de former des faisceaux les plus intenses possible, de bonne qualite optique tout en conservant une faible dispersion en energie. Afin d'etudier les collisions de ces ions avec une cible gazeuse formee par un jet su

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14

Cisse, Ousmane. "Études des réactions de transfert direct et de fragmentation induites par un faisceau de ⁴⁰Ar de 1760 MeV sur une cible de ²⁷Al." Paris 11, 1985. http://www.theses.fr/1985PA112216.

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L'étude des collisions périphériques dans la réaction ⁴⁰Ar à 44 MeV/u sur une cible de ²⁷Al a permis de mettre en évidence la coexistence de deux mécanismes : fragmentation et transfert. Pour les collisions les plus périphériques, nous avons observé des éjectiles de charge et de masse supérieure à celle du faisceau ; cela signe clairement la présence de réaction de transfert. Nous avons donc analysé et avec succès les spectres d'énergie des fragments proches du projectile, transfert de ± 2 nucléons, à l'aide d'un modèle de transfert direct vers les états du continu. Cependant le mécanisme domi

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15

Filho, Marcelo Vieira da Silva. "Avaliação dos efeitos locais na composição química de águas de chuva nas cidades de São Paulo e Cubatão." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/14/14133/tde-21062013-111123/.

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Este trabalho avaliou a deposição úmida de duas localidades da cidade de São Paulo (Universidade Presbiteriana Mackenzie localizada na região central e no IAG/USP localizado na zona oeste de São Paulo) e uma localidade pertencente ao município de Cubatão (CEPEMA), na Baixada Santista. O período de estudo compreendeu os meses de julho/2009 a agosto/2010 para o IAG/USP e Cubatão; enquanto que o conjunto amostral no Mackenzie é referente ao período de julho de 2002 a outubro de 2008. A partir da comparação com dados climatológicos verificaram-se para ambas as regiões que o ano de 2009 teve um inv

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16

Simpson, Robin. "The depth profiling of organic and inorganic materials using Ar+ and Ar+n ion beams." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/844979/.

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Gas cluster ion beam instruments represent the cutting edge in polymer depth profiling technology. This is because they can be used to analyse polymer samples while preserving the delicate chemical structure often lost when more conventional ion beams are used. In this thesis thorough investigations are conducted into the various advantages and disadvantages of using both Ar+ and Ar+n ions to analyse organic, inorganic and multi-layer samples by XPS and ToF-SIMS depth profiling. Analytical techniques including XPS, ToF-SIMS, AFM and laser interferometry were utilised to measure chemical and ph

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17

Souza, Patrícia Alexandre de. "Caracterização do material particulado fino e grosso e composição da fração inorgânica solúvel em água em São José dos Campos (SP)." Niterói, 2017. https://app.uff.br/riuff/handle/1/4959.

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Submitted by Biblioteca de Pós-Graduação em Geoquímica BGQ (bgq@ndc.uff.br) on 2017-10-24T12:57:59Z No. of bitstreams: 1 PATRICIA_DISSETAÇÃO_MESTRADO_GEOQUIMICA_2009.pdf: 4047978 bytes, checksum: b2a1f62ef245a5a0d8afcc3ae828bf17 (MD5)<br>Made available in DSpace on 2017-10-24T12:57:59Z (GMT). No. of bitstreams: 1 PATRICIA_DISSETAÇÃO_MESTRADO_GEOQUIMICA_2009.pdf: 4047978 bytes, checksum: b2a1f62ef245a5a0d8afcc3ae828bf17 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Fundação de Amparo a Pesquisa do Estado do Rio de Janeiro<br>Universidade Federal Fluminense. Instituto d

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Soda, K., M. Kato, Y. Sakuma, and K. Kawai. "Auger electron emission from a Si(111) surface during 11-keV Ar+ ion sputtering." Elsevier, 2013. http://hdl.handle.net/2237/20778.

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19

Al-Bayati, Amir H. H. "Radiation damage in Si(001) due to low energy Ar and Cl ion bombardment." Thesis, University of Salford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280801.

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20

Hornung, Balázs. "Rotational polarisation effects in the inelastic collisions of NO(X) and Ar." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:3fe4368b-6e16-469b-89bf-c8847203234e.

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Rotational polarisation effects have been investigated in the rotationally inelastic collisions of NO(X) and Ar by means of theoretical and experimental methods. Rotational polarisation describes the correlation between the <strong>k</strong>–<strong>k'</strong>–<strong>j'</strong> vectors, that is the initial and final relative velocities of the colliding partners and the final rotational angular momentum of the diatom, respectively. The simplest types of polarisation are the rotational orientation, or preferred sense of rotation, and the rotational alignment, or preferred plane of rotation.

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21

Benmeuraiem, Larbi. "Extension de la méthode du potentiel-modèle aux systèmes diatomiques à deux électrons actifs : application au transfert de charge dans les systèmes Ar+6/He, Ar+8/He et C+3/H." Bordeaux 1, 1987. http://www.theses.fr/1987BOR10619.

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Extension de la methode du potentiel modele pour la determination des energies electroniques adiatiques de tels systemes. Application a des collisions d'echange de charge aux basses energies (1-1000 ev/uma); accord tres satisfaisant avec l'experience. Pour le systeme c**(3+)/h, ou l'echange de charge s'effectue par un croisement evite aux tres grandes distances internucleaires, observation d'effets de translation importants meme aux basses energies

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Tabášek, Michal. "Upravená realita v kokpitu." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2020. http://www.nusl.cz/ntk/nusl-417241.

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Tato diplomová práce se zabývá využitím rozšířené reality v letectví. V této oblasti se zaměřuje na kontrolní seznamy v kokpitu využívané ve všech fázích letu k zajištění vykonání všech důležitých úkonů. Pro tento účel je vyvinuta mobilní aplikace, jejímž cílem je provést pilota krok po kroku kontrolním seznamem. Každý krok vyžaduje provedení určitého úkonu na konkrétním letovém nástroji nacházejícím se v kokpitu letadla. Příslušný letový nástroj spojený s aktivním úkolem je identifikován a označen vhodnou vizualizací. Experimentální aplikace je implementována s využitím herního nástroje Unity

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Franco, de Köhler Patricia. "Untersuchungen zur Wirkung von intranasal verabreichtem Xylometazolin bei normo- und brachyzephalen Hunden." Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-156124.

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Untersuchung zur Wirkung von intranasal verabreichtem Xylometazolin bei brachy- und normozephalen Hunden: Impuls-Oszillometrie und akustische Rhinometrie P. Franco, J. P. Hueber, G. U. Oechtering Klinik für Kleintiere, Arbeitsgruppe Brachyzephalie, Universität Leipzig Einleitung: Die zuchtbedingte Verkürzung des Gesichtsschädels brachy - zephaler Hunderassen hat zu einer Reihe klinisch relevanter morphologischer und physiologischer Veränderungen geführt. Hierzu zählen stenotische Naseneingänge, eine durch fehlgebildete Conchen obstruierte Nasenhöhle sowie ein verdicktes und verlängertes Gaumen

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Eroglu, Huseyin Cuneyt. "Design Of Reflective &amp." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611057/index.pdf.

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In order to improve the efficiency of various optical surfaces, optical coatings are used. Optical coating is a process of depositing a thin layer of a material on an optical component such as mirror or lens to change reflectance or transmittance. There are two main types of coatings namely<br>reflective and antireflective (AR) Coatings. Reflective and antireflective coatings have long been developed for a variety of applications in all aspects of use<br>for optical and electro-optical systems in telecommunications, medicine, military products and space applications. In this thesis, the main p

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Liao, Jyun-jie, and 廖俊傑. "Light emission from a GaAs(100) target during several keV Ar+ and N2+ ions sputtering." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/a9k23n.

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碩士<br>國立中央大學<br>材料科學與工程研究所<br>97<br>The interaction of energetic ions with solid surfaces results in the emission of excited ions. The excited particles decay either by a radiationless deexcitation process or by radiative photon emission. In this study, we use 9keV, 6keV and 3keV Ar+ ions and N2+ ions bombard clean GaAs(100) target separately. Results of the measurements on the projectile energy and ion type dependences of Ga I 417.2nm, 403.3nm and 294.4nm lines are presented. It is known that the process of radiationless and radiative deexcitation are highly sensitive to the chemical state of

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Jesenská, Eva. "Studium fyzikálních vlastností metalických nanostruktur s indukovanou magnetickou anizotropií." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-320998.

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The aim of this thesis is a systematic study of physical properties of magnetic multilayered nanostructures. Namely it include multilayered spin valves NiFe/Cu/Co with magnetic anisotropy iduced by magnetic field applied during the deposition. Induced magnetic anisotropy influences exchange interactions between magnetic layers and so it gives the possibility to control magnetic properties of nanolayers. This is important for applications in MRAM, magnetoresistive read heads and spin-transfer-torque devices. Magnetooptic spectroscopy and Kerr effect hysteresis loop measurement were used as effe

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Yeh, Chia-Bin, and 葉嘉彬. "Reactive Ion Etching of GaAs, InP and InGaP with BCl3/SF6/Ar Mixtures." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/23484652594160180713.

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碩士<br>國立交通大學<br>電子研究所<br>82<br>In this thesis, the investigation of Reactive Ion Etching ( RIE ) of GaAs, InP and InGaP with BCl3/SF6/Ar mixtures is reported. The etch rate was measured in order to find the dependence on RF power density, pressure, total gas flow rate and the ratio of each gas in the mixtures. The morphology of etched surfaces and self-bias were also in our concern. The ratio of BCl3 and SF6 in gas mixtures has significant influence on etch rate. Etching with both gases is

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Chen, Mei-Ting, and 陳美婷. "Microstructure and Magnetic Properties of Nano Cobalt Thin Films after Ar Ion Beam Bombardment." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/64825330615217380650.

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碩士<br>國立中興大學<br>材料科學與工程學系所<br>102<br>In this study, dual ion beam sputtering system is adopted to prepare the Aluminum / Cobalt films on silicon. The microstructure and magnetic properties of the Al/Co films through ion beam bombardment for ten minutes have been studied. In this experiment, X-ray diffraction analysis is used to confirm the lattice structure; Transmission electron microscopy (TEM) analysis is used to observe microstructure,including grain size, composition and structure and film thickness. The vibrating sample magnetometer (VSM) is used to measure the magnetic properties of thi

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Chen, Fu-Han, and 陳復漢. "Microstructure and Magnetic Properties of Nano Cobalt Thin Films after Ar/O2 Ion Beam Bombardment." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/p26mq5.

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碩士<br>國立中興大學<br>材料科學與工程學系所<br>102<br>The bilayer films of Al/Co on SiO2 substrate was prepared by dual ion-beam deposition technique. The structural and magnetic properties of the films were studied by Grazing Incident X-Ray Diffraction (GIXD), Transmission Electron Microscopy (TEM) and Vibrating Sample Magnetometer (VSM), respectively. XRD results showed that Co layer consisted of HCP structure with a＝2.50 Å, c＝4.06 Å. Cobalt oxides appeared two compounds：one is CoO layer consisted of FCC structure with a＝4.25 Å and the other is Co3O4 consisted of spinel structure with a＝8.08 Å. TEM resul

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Chen, Jan-Jim, and 陳加展. "The thermal effect of the Ar ion beam induced the topography abd the oxidation of silicon." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/72wkda.

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碩士<br>國立中央大學<br>機械工程研究所<br>94<br>In the industry of semiconductor it used many ways for well quality of SiO2. In my paper I use the way of IBIO to make it. First I put my sample into the vacuum chamber, second the sample is heated up 650℃, then I put oxygen into the chamber around the sample, final the ion of Ar bombardment the oxygen to put into silicon. In order to know the oxygen can putted into the silicon to form SiO2, I used X-ray Photoelectron Spectroscopy(XPS) to study the composition of the sample to sure it is existed SiO2. At the same time I also used Atomic Force Microscope(AFM) to

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GIAN, HE-GING, and 錢河清. "Study of siiicon surface damage induced with ar ion implantation and its passivation by atomic hydrogen." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/22111101962852339606.

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Chen, Chun-Hao, and 陳俊豪. "Microstructure and Magnetic Properties of Iron/Si Oxide Thin Films after Ar/O2 Ion Beam Bombardment." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/87091010075002654369.

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碩士<br>國立中興大學<br>材料科學與工程學系所<br>102<br>In this experiment , the bilayer films of Fe/Si Oxide on the SiO2 substrate was prepared by dual ion-beam deposition system and the bilayer films of Fe/Si Oxide is bombarded by the Ar/O2(41%) Ion Beam. We use the XDR to identify the crystal structure and based on the analysis result, it have the Fe and Fe-Oxide films on the substrate. Using the TEM tool to confirm the profile in this step. Based on the TEM cross section analysis result. We can fine there are 5 films structure by the TEM cross section image. The bottom layer is the substrate and the top lay

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Tu, Chia-Hao, and 塗家豪. "The morphology and component analysis of ZnO nanostructures fabricated by Ar+ ion beam bombardment and thermal oxidation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/xf57kd.

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碩士<br>國立中央大學<br>材料科學與工程研究所<br>97<br>Since carbon nanotube has been found, the one dimension of nanostructures has attracted great attention gradually, Among them that zinc oxide is one of the hot applications recently. Zinc oxide has broad range of applications and potentiality because of its variety of nanostructures、chemical and thermal stability and light emission. In this thesis, we use Ar+ ion beam bombard zinc foil. Make zinc surface rough, and cooperate with thermal oxidation in the air. Produce zinc oxide nanostructures. We use 5、7、10keV ion beam energy and bombard 1、4、8、16 hours. Af

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Wang, Shin-Kung, and 王成功. "Effect of energy per atom (E/n) in Ar gas cluster ion beam (GCIB, Arn+) and O2+ cosputter for depth profiling of soft materials by secondary ion mass spectrometry." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/p8vzz2.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>105<br>Over the past few years, gas cluster ion beams (GCIB) has shown great capability of dealing with bio-materials and soft materials owing to its high sputter yield and low damage accumulation that preserved the molecular structures during depth profiling, therefore molecular ion of high mass can be obtained in subsequent analysis. However, although GCIB has lower damage accumulation comparing with C60+ and monoatomic ions, the inevitable alteration in chemical structure can still change the property of remaining surface and gradually affect the accuracy of d

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Hung, Shu-Han, and 洪舒涵. "Effect of Temperature and Energy per Atom (E/n) in Ar Gas Cluster Ion Beam (GCIB, Arn+) on Depth Profile of Organic Thin Film by Secondary Ion Mass Spectroscopy." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/752re9.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>106<br>Secondary Ion Mass Spectroscopy (SIMS), with its ability to analyze chemical compositions at near surface and along the depth, has been used for decades. However, depth profiles of bio-materials and soft materials are more difficult to obtain due to the fragmentation and transformation of molecules induced by atomic ion sputtering gun. Nevertheless, with more surface-localized energy deposition, gas cluster ion beam (GCIB) could preserve molecular structures during sputtering hence is a promising candidate for analyzing soft materials. Furthermore, by adju

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Chang, Chi-Jen, and 張几人. "Parallel Detection and Quantification of Thin-Film Peptides with Dynamic-Secondary Ion Mass Spectrometry (D-SIMS) Excited by C60+-Ar+ Co-Sputtering." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/75941146197974382243.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>99<br>Using pulsed primary cluster ions, especially for C60+ cluster ion, time-of-flight secondary ion mass spectrometry (ToF-SIMS) has been shown to be a promising technique for analyzing biological specimens. With molecular secondary ions of high mass, multiple molecules can be identified at the same time without prior separation or isotope labeling. While current reports are based on static-SIMS that makes depth profile more complicated, a dynamic-SIMS based technique is reported in this work. Mixed trehalose and peptides were used as a model for evaluating th

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Eliades, John Alexander. "A Radio Frequency Quadrupole Instrument for use with Accelerator Mass Spectrometry: Application to Low Kinetic Energy Reactive Isobar Suppression and Gas–phase Anion Reaction Studies." Thesis, 2012. http://hdl.handle.net/1807/32706.

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A radio frequency (rf) quadrupole instrument, currently known as an Isobar Separator for Anions (ISA), has been integrated into an Accelerator Mass Spectrometry (AMS) system to facilitate anion–gas reactions before the tandem accelerator. An AMS Cs+ sputter source provided > 15 keV ions that were decelerated in the prototype ISA to < 20 eV for reaction in a single collision cell and re-accelerated for AMS analysis. Reaction based isobar suppression capabilities were assessed for smaller AMS systems and a new technique for gas–phase reaction studies was developed. Isobar suppression of 36S– a

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