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Combining Many-Body Perturbation and Quantum Electrodynamics 结合多体摄动与量子电动力学
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-12-18 DOI: 10.1155/2011/723574
I. Lindgren, S. Salomonson, Daniel Hedendahl
{"title":"Combining Many-Body Perturbation and Quantum Electrodynamics","authors":"I. Lindgren, S. Salomonson, Daniel Hedendahl","doi":"10.1155/2011/723574","DOIUrl":"https://doi.org/10.1155/2011/723574","url":null,"abstract":"It has been a long-sought problem to be able to combine many-body perturbation theory and quantum electrodynamics into a unified, covariant model. Such a model has recently been developed at our laboratory and is outlined in the present paper. The model has potential applications in many areas and opens up the possibility of studying the interplay between various interactions in different system. The model has so far been applied to highly ionized helium-like ions, and some numerical results are given. It is expected that the combined effect—that has never been calculated before—could have a significant effect on certain experimental data. The radiative effects are being regularized using the dimensional regularization in Coulomb gauge, and the first numerical results have been obtained.","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"63 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2011-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83638317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Bound States in Delta Function Potentials 函数势的束缚态
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-11-20 DOI: 10.1155/2011/573179
S. Geltman
{"title":"Bound States in Delta Function Potentials","authors":"S. Geltman","doi":"10.1155/2011/573179","DOIUrl":"https://doi.org/10.1155/2011/573179","url":null,"abstract":"We present a systematic treatment of the bound state structure of a short-range attractive interatomic potential in one, two, and three dimensions as its range approaches zero. This allows the evaluation of the utility of delta function potentials in the modeling of few-body systems such as nuclei, atoms, and clusters. The relation to scattering by delta function potentials is also discussed.","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"26 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74305979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Grazing Molecule Excitation as a Tool to Analyse the Amino Acid Sequence in Oligopeptides 放牧分子激发作为分析寡肽氨基酸序列的工具
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-10-29 DOI: 10.1155/2011/356589
H. Jungclas, L. Schmidt, V. Komarov, A. Popova
{"title":"Grazing Molecule Excitation as a Tool to Analyse the Amino Acid Sequence in Oligopeptides","authors":"H. Jungclas, L. Schmidt, V. Komarov, A. Popova","doi":"10.1155/2011/356589","DOIUrl":"https://doi.org/10.1155/2011/356589","url":null,"abstract":"A novel mass spectrometric method to analyse the sequence of amino acid residues in oligopeptides is proposed. Amino acid residues in peptide molecules contain chain-like structures of identical CH dipoles (IR antennas), which acquire IR energy quanta by interaction with periodic Coulomb fields and accumulate vibration excitation energy. This can subsequently lead to the dissociation of specific trap bonds inside the peptide molecule. Such excitation and dissociation processes are assumed to occur when peptide ions graze at atomic distance along a set of screened charges on a surface. These processes of grazing molecule excitation (GME) and dissociation (GMD) were applied to analyse sequences of oligopeptides by using TOF mass spectrometry. At specific grazing velocities the experimental fragment ion spectra of oligopeptides must contain a peak of high abundance corresponding to the N-terminal amino acid. This specific property of GMD offers the possibility to determine the amino acid sequence of oligopeptides.","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"12 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87530471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Studies on the ns-IR-Laser-Induced Plasma Parameters in the Vanadium Oxide 激光诱导氧化钒等离子体参数的研究
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-10-16 DOI: 10.1155/2011/504764
A. Sarkar, R. Shah, D. Alamelu, S. Aggarwal
{"title":"Studies on the ns-IR-Laser-Induced Plasma Parameters in the Vanadium Oxide","authors":"A. Sarkar, R. Shah, D. Alamelu, S. Aggarwal","doi":"10.1155/2011/504764","DOIUrl":"https://doi.org/10.1155/2011/504764","url":null,"abstract":"We report spectroscopic studies of laser-induced plasma (LIP) produced by ns-IR-Nd:YAG laser light pulses of different energies onto four different oxides of vanadium (VO, V2O3, VO2, and V2O5) in air under atmospheric pressure. For each oxide with a different oxidation state of vanadium, both electron density and plasma temperature were calculated for different time delays and laser pulse energies. The plasma temperature was determined from Boltzmann plot method, whereas the electron number density was estimated from the Saha equation. The decay rates for plasma temperature as well as electron density were observed to follow power law and were independent of the nature of vanadium oxide. These investigations provide an insight to optimize various parameters during LIBS analysis of vanadium-based matrices.","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"14 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2011-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88085650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Aging of Oxygen-Treated Trimethylsilane Plasma-Polymerized Films Using Spectroscopic Ellipsometry 用椭圆偏振光谱法研究氧处理三甲基硅烷等离子体聚合膜的老化
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-09-29 DOI: 10.1155/2011/295304
T. El-Agez, DavidM. Wieliczka, Chris Moffitt, S. Taya
{"title":"Aging of Oxygen-Treated Trimethylsilane Plasma-Polymerized Films Using Spectroscopic Ellipsometry","authors":"T. El-Agez, DavidM. Wieliczka, Chris Moffitt, S. Taya","doi":"10.1155/2011/295304","DOIUrl":"https://doi.org/10.1155/2011/295304","url":null,"abstract":"Oxygen-treated trimethylsilane (TMS) plasma-polymerized films are investigated using rotating polarizer and analyzer ellipsometer. Aging process and composition of the samples are studied. Coordinated X-ray photoelectron spectroscopy (XPS) depth profiling studies on these films is presented for more detailed understanding of the aging process as well as the modeling of these films.","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"671 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74750987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Molecular Structure and Vibrational Analysis of 1-Bromo-2-Chlorobenzene Using ab initio HF and Density Functional Theory (B3LYP) Calculations 用从头算HF和密度泛函理论(B3LYP)计算1-溴-2-氯苯的分子结构和振动分析
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-08-11 DOI: 10.1155/2011/512841
G. Shakila, S. Periandy., S. Ramalingam
{"title":"Molecular Structure and Vibrational Analysis of 1-Bromo-2-Chlorobenzene Using ab initio HF and Density Functional Theory (B3LYP) Calculations","authors":"G. Shakila, S. Periandy., S. Ramalingam","doi":"10.1155/2011/512841","DOIUrl":"https://doi.org/10.1155/2011/512841","url":null,"abstract":"The FT-Raman and FT-IR spectra for 1-bromo-2-chlorobenzene (1B2CB) have been recorded in the region 4000–100 cm−1 and compared with the harmonic vibrational frequencies calculated using HF/DFT (B3LYP) method by employing 6-31","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"88 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2011-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80854147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
Multiphoton Ionization and Fragmentation of Hydrogen Chloride: A Diatomic Still Good for a Surprise 氯化氢的多光子电离与破碎:双原子仍有惊喜
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-05-19 DOI: 10.1155/2011/410108
C. Maul, A. Chichinin, K. Gericke
{"title":"Multiphoton Ionization and Fragmentation of Hydrogen Chloride: A Diatomic Still Good for a Surprise","authors":"C. Maul, A. Chichinin, K. Gericke","doi":"10.1155/2011/410108","DOIUrl":"https://doi.org/10.1155/2011/410108","url":null,"abstract":"The competition between multiphoton ionization and fragmentation in the diatomic molecule hydrogen chloride is reviewed. Emphasis is laid on recent experimental results employing chemical imaging methods in order to obtain kinetic energy distributions and angular distributions of photoproducts. The energy range considered is 15 to 20 eV, equivalent to the absorption of three or four photons in the ultraviolet wavelength range. \u0000The role of Rydberg states as resonantly excited intermediate states in the ionization/fragmentation processes is assessed. Mixing among states gives rise to peculiarly shaped double minimum potential energy curves which allow for the production of hydrogen and chlorine atomic and ionic fragments via several competing pathways, in addition to the production of molecular HCl+ ions. \u0000States with different electronic properties show a qualitatively different behaviour from states. Accidental resonances between states of differing orbital angular momentum or multiplicity serve to override these differences and cause subtle as well as significant deviations from the unperturbed behaviour.","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"65 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2011-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91089948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Bandgap Engineering in ZnO By Doping with 3d Transition Metal Ions 三维过渡金属离子掺杂ZnO的带隙工程研究
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-04-27 DOI: 10.1155/2011/270540
D. Joseph, C. Venkateswaran
{"title":"Bandgap Engineering in ZnO By Doping with 3d Transition Metal Ions","authors":"D. Joseph, C. Venkateswaran","doi":"10.1155/2011/270540","DOIUrl":"https://doi.org/10.1155/2011/270540","url":null,"abstract":"Bulk Zn0.95TM0.05O (, Mn, Fe, Co, and Ni) were synthesized by the standard ceramic method and explored for variation in their band gap energies using Diffuse Reflectance Spectroscopy in the ultraviolet-visible region. Phase quantification and compositional studies were performed using Rietveld analysis of the X-Ray Diffraction patterns, Scanning Electron microscopy, and Energy Dispersive X-Ray Analysis. Due to 3d transition ion doping, the samples have brilliant colors, and the absorption edge of Zn0.95TM0.05O was found to shift towards the visible and ultraviolet-visible region. The blue and red shifts in band gaps observed for various transition metal ion-doped ZnO are discussed.","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"61 6","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2011-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91481051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 66
Laser-Induced Defects in a Bulk GaAs Used as an Output Coupler in an Nd : YAG Laser Cavity Nd: YAG激光腔中用作输出耦合器的块体砷化镓的激光诱导缺陷
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-04-19 DOI: 10.1155/2011/879146
S. Payziyev, S. Bakhramov, A. Kasimov, F. Shayimov
{"title":"Laser-Induced Defects in a Bulk GaAs Used as an Output Coupler in an Nd : YAG Laser Cavity","authors":"S. Payziyev, S. Bakhramov, A. Kasimov, F. Shayimov","doi":"10.1155/2011/879146","DOIUrl":"https://doi.org/10.1155/2011/879146","url":null,"abstract":"By using bulk GaAs as an output coupler as well as a saturable absorber, with changing of concentration of defects inside the laser cavity, Q-switching of flashlamp-pumped Nd : YAG laser has been studied. It is shown that the formation of the laser pulses, in a wide range of duration, which were reported in a lot of previous papers is caused by the intracavity changes of the defect concentration in GaAs. The factor of increase in defect concentration is estimated by modeling of the pulse formation process.","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"50 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76175820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optical Response Near the Soft X-Ray Absorption Edges and Structural Studies of Low Optical Contrast System Using Soft X-Ray Resonant Reflectivity 软x射线吸收边缘附近的光学响应及基于软x射线共振反射率的低光学对比度系统结构研究
Journal of Atomic, Molecular, and Optical Physics Pub Date : 2011-04-11 DOI: 10.1155/2011/649153
Maheswar Nayak, G. Lodha
{"title":"Optical Response Near the Soft X-Ray Absorption Edges and Structural Studies of Low Optical Contrast System Using Soft X-Ray Resonant Reflectivity","authors":"Maheswar Nayak, G. Lodha","doi":"10.1155/2011/649153","DOIUrl":"https://doi.org/10.1155/2011/649153","url":null,"abstract":"Fine structure features of energy-dependent atomic scattering factor near the atomic absorption edge, are used for structural analysis of low-Z containing thin film structures. The scattering contrast undergoes large and abrupt change as the incident photon energy approaches the natural frequency of the atom and is sensitive to variation in atomic composition and atomic density. Soft X-ray resonant reflectivity is utilized for determination of composition at the buried interfaces with subnanometer sensitivity. This is demonstrated through characterization of Mo/Si multilayers near Si L-edge. We also demonstrate the possibility of probing variation of atomic density in thin films, through the characterization of Fe/B4C structure, near B K-edge. Sensitivity of soft X-ray resonant reflectivity to native oxide is demonstrated through characterization of BN films near B K-edge.","PeriodicalId":15042,"journal":{"name":"Journal of Atomic, Molecular, and Optical Physics","volume":"117 6 1","pages":"1-23"},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83420898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
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