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High Resolution Electronic Spectroscopy of ZnCH3 and CdCH3 ZnCH3和CdCH3的高分辨电子能谱
High Resolution Spectroscopy Pub Date : 1993-12-15 DOI: 10.1063/1.465521
Timothy M. Cerny, X. Tan, J. Williamson, E. Robles, A. Ellis, T. Miller
{"title":"High Resolution Electronic Spectroscopy of ZnCH3 and CdCH3","authors":"Timothy M. Cerny, X. Tan, J. Williamson, E. Robles, A. Ellis, T. Miller","doi":"10.1063/1.465521","DOIUrl":"https://doi.org/10.1063/1.465521","url":null,"abstract":"The number of organometallic free radicals studied spectroscopically in the gas phase has been very limited until quite recently. Application of Broida oven, laser photolysis and laser photolysis/vaporization techniques to synthesize these transient species has significantly enlarged the number of reports over the past few years. This research group’s contribution to the area have been a series of reports by Robles, Ellis and Miller detailing electronic and vibrational structures (~.5 cm-1 resolution) of 15 species of the form M-R (M = Mg, Ca, Zn and Cd; R = cyclopentadienyl (Cp), pyrollyl (Py) and methylcyclopentadienyl (MCp)) and M-CH3 (M = Ca, Zn and Cd), many of them observed for the first time.1-8 These molecules are more than simply novel constructs. The methyl and Cp derivatives are recognized as important intermediates in metal deposition processes while the metal-Py species are found as subunits in several chemical substances of biological importance. Metal-ligand bonding sites, vibrational frequencies, spin-orbit splittings and barriers to internal rotation are some of the types of information that this work has yielded. To augment this work, a rotationally resolved study is presented here which confirms the electronic state symmetry assignments given in earlier studies, and more importantly, determines rotational constants and other interaction parameters of these radicals.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127413480","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: 49
Tunable Far-Infrared Laser Spectroscopy of Hydrogen Bonds 氢键的可调谐远红外激光光谱学
High Resolution Spectroscopy Pub Date : 1988-12-01 DOI: 10.1063/1.455380
G. Blake, K. L. Busarow, R. C. Cohen, K. Laughlin, Yuan‐Pern Lee, R. Saykally
{"title":"Tunable Far-Infrared Laser Spectroscopy of Hydrogen Bonds","authors":"G. Blake, K. L. Busarow, R. C. Cohen, K. Laughlin, Yuan‐Pern Lee, R. Saykally","doi":"10.1063/1.455380","DOIUrl":"https://doi.org/10.1063/1.455380","url":null,"abstract":"Sub-Doppler far-infrared vibration-rotation-tunneling spectra of several water- and ammonia-containing clusters will be presented. Intermolecular potential energy surfaces derived from these spectra will also be discussed.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129505453","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: 65
Perturbative Nearly-Degenerate Four-Wave Mixing Lineshapes in Gases 气体中的微扰近简并四波混合线形
High Resolution Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/hrs.1993.tub1
L. Rahn
{"title":"Perturbative Nearly-Degenerate Four-Wave Mixing Lineshapes in Gases","authors":"L. Rahn","doi":"10.1364/hrs.1993.tub1","DOIUrl":"https://doi.org/10.1364/hrs.1993.tub1","url":null,"abstract":"Nearly-degenerate four-wave mixing (NDFWM) spectroscopy1 and the closely related tunable-laser-induced grating spectroscopies2 have proved to be valuable tools in the study of nonlinear optical interactions. The NDFWM spectral lineshape provides information concerning the lifetimes,3 and therefore the identities, of multiphoton scattering mechanisms. In addition to the great number of investigations in liquids and solids, considerable research has focused on wave-mixing in resonant atomic gases for phase conjugation applications.4 Although many special cases have been discussed, general expressions that include the effects of molecular motion for the NDFWM lineshape in gases have not been previously reported. The present study is motivated by an interest in understanding the mechanisms contributing to degenerate four-wave mixing (DFWM) spectroscopy in molecular gases for application to combustion and chemical physics research.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117065535","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
Measurement of Collision Cross Section and Line Broadening Coefficient for 2p8 → 4d4 Transition in Neon 氖中2p8→4d4跃迁的碰撞截面和线展宽系数的测量
High Resolution Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/hrs.1993.wb2
P. Kumar, S. S. Harilal, Vpn Nampoori, C. Vallabhan
{"title":"Measurement of Collision Cross Section and Line Broadening Coefficient for 2p8 → 4d4 Transition in Neon","authors":"P. Kumar, S. S. Harilal, Vpn Nampoori, C. Vallabhan","doi":"10.1364/hrs.1993.wb2","DOIUrl":"https://doi.org/10.1364/hrs.1993.wb2","url":null,"abstract":"The collision cross section and broadening coefficient for 2p8 → 4d4. transition in neon has been evaluated by high resolution optogalvanic spectroscopy using a single mode ring dye laser.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122906668","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
Stimulated Emission Pumping (SEP)1 Studies of Energy Transfer in Highly Vibratonally Excited Oxygen 受激发射泵浦(SEP)1高振动激发氧中能量传递的研究
High Resolution Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/hrs.1993.mb5
J. A. Mack, J. Price, A. Wodtke
{"title":"Stimulated Emission Pumping (SEP)1 Studies of Energy Transfer in Highly Vibratonally Excited Oxygen","authors":"J. A. Mack, J. Price, A. Wodtke","doi":"10.1364/hrs.1993.mb5","DOIUrl":"https://doi.org/10.1364/hrs.1993.mb5","url":null,"abstract":"Recent results have shown that highly vibrationally excited O2 is formed in significant quantities from the ultraviolet photolyis of ground state ozone. An important question for understanding the balance of O3 in the upper atmosphere is the lifetime of these highly vibrationally excited molecules which are proposed2 to be a photolytic source of odd oxygen atoms. In this work we report the rate constants for the collisional deactivation of SEP prepared O2(v\"=18-25) by O2(v\"=0), at temperatures of 295 and 395 K. The experiments are analogous to the \"Pump\", \"Dump\" and \"Probe\" studies carried out by Yang et al on NO.3 A pulsed tunable Argon Fluoride laser is used to \"PUMP\" O2 from \u0000 \u0000 \u0000 \u0000 X\u0000 3\u0000 \u0000 \u0000 Σ\u0000 u\u0000 −\u0000 \u0000 \u0000 \u0000 ground electronic state to a specific rovibrational level of the \u0000 \u0000 \u0000 \u0000 B\u0000 3\u0000 \u0000 \u0000 Σ\u0000 g\u0000 −\u0000 \u0000 \u0000 \u0000 excited electronic state via the well known Schumann-Runge bands4. A Xenon-Chloride pumped tunable dye laser system then stimulates, or \"DUMPS\" the O2 back to a specific excited rovibrational level of the ground electronic state. A second tunable dye laser system then \"PROBES\" the vibrationally excited O2 population by Laser Induced Fluorescence. By varying the time delay between the DUMP and PROBE lasers, the time dependant occupation of the prepared vibrational level is monitored. The collisional quenching rate constant for a given vibrational level is then determined from the pressure dependance of the lifetime. Implications of the measured rates for atmospheric chemical reactions are discussed.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128151123","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
Infrared Laser Spectroscopy of Jet-Cooled Carbon Clusters: The Structure and Spectroscopy of 3Σ c6 喷射冷却碳团簇的红外激光光谱:3Σ c6的结构和光谱
High Resolution Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/hrs.1993.tha2
H. Hwang, A. Van Orden, Keiichi Tanaka, E. Kuo, J. Heath, R. Saykally
{"title":"Infrared Laser Spectroscopy of Jet-Cooled Carbon Clusters: The Structure and Spectroscopy of 3Σ c6","authors":"H. Hwang, A. Van Orden, Keiichi Tanaka, E. Kuo, J. Heath, R. Saykally","doi":"10.1364/hrs.1993.tha2","DOIUrl":"https://doi.org/10.1364/hrs.1993.tha2","url":null,"abstract":"Carbon clusters have been of interest for many years due to their astrophysical importance and their role in the chemistry of high temperature, carbon-rich environments.1 Recent experimental and theoretical studies have been highly successful in elucidating the structure and bonding of small carbon clusters containing an odd number of atoms. The picture which has emerged is that odd clusters of three to nine atoms possess linear ground electronic states with cumulenic bonding. One of the most fascinating characteristics of these odd clusters is their unusual bending motion. C3, for example, has long been known to possess an extraordinarily low frequency, high amplitude bending mode, and indeed all of these linear chains are characterized by low bending frequencies.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115759846","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
Electronic Surface State and Plasmon-Phonon Coupled Excitations at the surface of Modulation-doped GaAs/AlGaAs Multiquantum Wells: A Study of High-Resolution Electron-Energy-Loss Spectroscopy(HREELS) 调制掺杂GaAs/AlGaAs多量子阱表面的电子表面态和等离子体-声子耦合激发:高分辨率电子-能量损失谱(HREELS)研究
High Resolution Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/hrs.1993.mb7
R. Yu
{"title":"Electronic Surface State and Plasmon-Phonon Coupled Excitations at the surface of Modulation-doped GaAs/AlGaAs Multiquantum Wells: A Study of High-Resolution Electron-Energy-Loss Spectroscopy(HREELS)","authors":"R. Yu","doi":"10.1364/hrs.1993.mb7","DOIUrl":"https://doi.org/10.1364/hrs.1993.mb7","url":null,"abstract":"A selfconsistent framework for study of the surface electronic structure of finite superlattices has been proposed. Our emphasis is on the influence of accumulation or depletion layer on the surface states (Tamm states). We have used a modulated doping profile, including an accumulation or a depletion surface layer, in our selfconsistent calculations of potential and carrier density profile. We have found the existence of Tamm states above(depletion layer) or below(accumulation layer) the superlattice miniband. One of the Tamm states found crosses the Fermi energy in the energy gap when the depletion effect, resulting from dangling bonds, defects, impurities, etc, near the surface increases. In our case, near the top layer of the superlattice the depletion region was formed as a result of the pinning of the Fermi level below its position in intrinsic GaAs due to the midgap surface states.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117087633","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
Laser Preparation and Probing of Initial and Final Angular Momentum States in the Collision-Induced Energy Transfer Ca (4s4p 3P1) + He → Ca (4s4p 3P2) + He 碰撞诱导能量转移Ca (4s4p 3P1) + He→Ca (4s4p 3P2) + He初始和最终角动量态的激光制备和探测
High Resolution Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/hrs.1993.thb4
Eileen M. Spain, Christopher J. Smith, M. Dalberth, S. Leone
{"title":"Laser Preparation and Probing of Initial and Final Angular Momentum States in the Collision-Induced Energy Transfer Ca (4s4p 3P1) + He → Ca (4s4p 3P2) + He","authors":"Eileen M. Spain, Christopher J. Smith, M. Dalberth, S. Leone","doi":"10.1364/hrs.1993.thb4","DOIUrl":"https://doi.org/10.1364/hrs.1993.thb4","url":null,"abstract":"The nature of atomic collisions can be revealed through the preparation and probing of aligned or oriented states. Intense interest in this research topic is evident by the numerous current experimental and theoretical investigations.1 The results of these studies provide a means of visualizing the important mechanisms and symmetries of the collision process with unprecedented detail.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127261179","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
Carbenes in the Interstellar Gas 星际气体中的卡贝尼星
High Resolution Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/hrs.1993.tha1
P. Thaddeus
{"title":"Carbenes in the Interstellar Gas","authors":"P. Thaddeus","doi":"10.1364/hrs.1993.tha1","DOIUrl":"https://doi.org/10.1364/hrs.1993.tha1","url":null,"abstract":"Carbenes are a significant trace constituent of the gas in the interstellar medium (and in the expanding shell around at least one star), representing about one-sixth of the molecular species that have been identified in space. The identification of one of the most abundant and widespread interstellar carbenes, the cyclopropenylidene ring, C3H2, is described, together with recent laboratory work on the excited vibrational states of this molecule and on the geometrical structure of one of its isomers, the carbon chain carbene H2C3. A number of additional free carbines which might be detected in space are considered. There are at least two reasons why carbenes are comparatively conspicuous in astronomical sources relative to other reactive molecules: one is their high polarity; a second is their production via the same ion-molecule reactions that make known stable species in space (or very similar reactions). Finally, it is pointed out that cumulene carbon chains somewhat longer than those so far detected in space are promising candidates for the carriers of the interstellar optical diffuse bands.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130569260","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
Optimization of Raman Signal Enhancement in Kretschmann Configuration Kretschmann结构中拉曼信号增强的优化
High Resolution Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/hrs.1993.wa4
N. Primeau, J. Coutaz, L. Abello
{"title":"Optimization of Raman Signal Enhancement in Kretschmann Configuration","authors":"N. Primeau, J. Coutaz, L. Abello","doi":"10.1364/hrs.1993.wa4","DOIUrl":"https://doi.org/10.1364/hrs.1993.wa4","url":null,"abstract":"Several experimental and theoretical studies [1,2,3] of Surface Plasmons Enhanced Raman Scattering (SPERS) in Kretschmann geometry (prism-metal-dielectric stacks) have demonstrated that it is possible to use surface plasmons (SP) to enhance Raman scattering from molecules adsorbed on a metal film. The enhancement process originates from two contributions: First, excitation of SP at pump frequency (ωi) and second, excitation of SP at Stokes frequency (ωs). To get the strongest Raman signal, scattered light must be detected on the prism side [3]. Indeed, the collected light comes from the outcoupling of SP at the Stokes frequency. In an experiment of SPERS, the Raman intensity depends on the distance of the active molecules to the metal surface [2]. Moreover, it has been suggested [3] that the thickness of the metal film deposited onto the prism should also be taken into account if one wants to improve the limit of detection.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121559842","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
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