T. Germer, J. Stephenson, E. Heilweil, R. Cavanagh
Recent advances in time-resolved measurement techniques have provided new molecular level insights into energy transfer processes. Through pump-probe measurements of excited state recovery, direct measurements of lifetimes and energy transfer pathways have been achieved. In vapor, liquid, and condensed phase studies, these techniques have provided the capability of following the evolution of molecular processes. Application of similar techniques to clarify the timescales and pathways for energy transfer processes at surfaces is only now beginning to meet with success.1,2
{"title":"Time-Resolved Probes of Adsorbate-Substrate Energy Transfer","authors":"T. Germer, J. Stephenson, E. Heilweil, R. Cavanagh","doi":"10.1364/hrs.1993.wa3","DOIUrl":"https://doi.org/10.1364/hrs.1993.wa3","url":null,"abstract":"Recent advances in time-resolved measurement techniques have provided new molecular level insights into energy transfer processes. Through pump-probe measurements of excited state recovery, direct measurements of lifetimes and energy transfer pathways have been achieved. In vapor, liquid, and condensed phase studies, these techniques have provided the capability of following the evolution of molecular processes. Application of similar techniques to clarify the timescales and pathways for energy transfer processes at surfaces is only now beginning to meet with success.1,2","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":"133229061","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}
Molecules in condensed phase systems are coupled to their environments through intermolecular interactions. These interactions influence the internal electronic and vibrational states of molecules. At any finite temperature, solvent molecules are in constant motion, even in a low temperature glass. Since intermolecular interactions are distance and orientation dependent, the motions of the solvent make the intermolecular interactions with solute molecules inherently time dependent. These time dependent interactions result in fluctuations in the solute's electronic and vibrational energy levels. Energy fluctuations are responsible for processes such as thermal activation of a chemical reaction.
{"title":"Dynamics in Glasses and Liquids: Optical Non-Linear Line Narrowing Experiments","authors":"M. Fayer","doi":"10.1364/hrs.1993.wa1","DOIUrl":"https://doi.org/10.1364/hrs.1993.wa1","url":null,"abstract":"Molecules in condensed phase systems are coupled to their environments through intermolecular interactions. These interactions influence the internal electronic and vibrational states of molecules. At any finite temperature, solvent molecules are in constant motion, even in a low temperature glass. Since intermolecular interactions are distance and orientation dependent, the motions of the solvent make the intermolecular interactions with solute molecules inherently time dependent. These time dependent interactions result in fluctuations in the solute's electronic and vibrational energy levels. Energy fluctuations are responsible for processes such as thermal activation of a chemical reaction.","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":"129683981","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}
Interpretation of low pressure measurements of pressure broadened line widths is made difficult by the fact that Doppler line width and measurement laser line width both generally contribute significantly to the total line width. This is further complicated by the fact that the Doppler and Laser contributions are non linear in the low pressure regime when the line width is plotted as a linear function of pressure.
{"title":"Low Pressure Measurements of Line Broadening Coefficients in CH3F","authors":"M. Nischan, D. Clark, D. Guerin, A. Mantz","doi":"10.1364/hrs.1993.wb1","DOIUrl":"https://doi.org/10.1364/hrs.1993.wb1","url":null,"abstract":"Interpretation of low pressure measurements of pressure broadened line widths is made difficult by the fact that Doppler line width and measurement laser line width both generally contribute significantly to the total line width. This is further complicated by the fact that the Doppler and Laser contributions are non linear in the low pressure regime when the line width is plotted as a linear function of pressure.","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":"123907483","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}
The characteristic feature of the transversal cooling with OPT is that light pressure force F z is of constant sign in a whole range of velocity variation [1,2]. Therefore, decelerating the atoms with v z < 0, the same force accelerates the atoms with positive velocities, that leads to the considerable loss of final intensity of the atomic beam.
{"title":"Production of the High-Intensive Beans of Ultracold Atoms for High Resolution Spectroscopy","authors":"E. Korsunsky, D. Kosachiov, Y. Rozhdestvensky","doi":"10.1364/hrs.1993.wb4","DOIUrl":"https://doi.org/10.1364/hrs.1993.wb4","url":null,"abstract":"The characteristic feature of the transversal cooling with OPT is that light pressure force F\u0000 z\u0000 is of constant sign in a whole range of velocity variation [1,2]. Therefore, decelerating the atoms with v\u0000 z\u0000 < 0, the same force accelerates the atoms with positive velocities, that leads to the considerable loss of final intensity of the atomic beam.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"41 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":"123611616","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}
Recent high resolution experimental studies of the electronic spectra of triatomic dihydrides and their ions have provided a severe test of current models of electronic orbital angular momentum-nuclear - vibrational angular momentum coupling. This coupling is associated with the breakdown of the Born-Oppenheimer separation of electronic orbital and nuclear motion, the Renner-Teller effect, and also with spin-orbit coupling.
{"title":"Renner Teller and Spin-orbit Perturbations in Triatomic Molecules","authors":"A. Alijah, G. Duxbury","doi":"10.1364/hrs.1993.mb6","DOIUrl":"https://doi.org/10.1364/hrs.1993.mb6","url":null,"abstract":"Recent high resolution experimental studies of the electronic spectra of triatomic dihydrides and their ions have provided a severe test of current models of electronic orbital angular momentum-nuclear - vibrational angular momentum coupling. This coupling is associated with the breakdown of the Born-Oppenheimer separation of electronic orbital and nuclear motion, the Renner-Teller effect, and also with spin-orbit coupling.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"65 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":"126484239","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}
The infrared spectrum of the simplest oxime, CH2NOH, was first obtained at low resolution in the gas phase by Califano and Lüttke1. Subsequent high resolution spectroscopy by Duxbury el al.2 and by Duxbury3 demonstrated that although the original vibrational analysis was correct, the directions of the transition moments derived fro from the analysis of low resolution band contours were not.
首先用Califano和l ttke1在气相中以低分辨率获得了最简单的肟CH2NOH的红外光谱。随后由Duxbury el .2和Duxbury3进行的高分辨率光谱分析表明，虽然最初的振动分析是正确的，但由低分辨率波段轮廓分析得出的过渡矩方向是错误的。
{"title":"Infrared Fourier Transform and Diode Laser Spectra of Formaldoxime","authors":"R. Bannai, G. Duxbury","doi":"10.1364/hrs.1993.thb2","DOIUrl":"https://doi.org/10.1364/hrs.1993.thb2","url":null,"abstract":"The infrared spectrum of the simplest oxime, CH2NOH, was first obtained at low resolution in the gas phase by Califano and Lüttke1. Subsequent high resolution spectroscopy by Duxbury el al.2 and by Duxbury3 demonstrated that although the original vibrational analysis was correct, the directions of the transition moments derived fro from the analysis of low resolution band contours were not.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"38 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":"125357446","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}
The propargyl amine spectrum was observed using an electric resonance optothermal spectrometer coupled to a CO2 laser-microwave sideband system for measurement of 10 µm spectra and to a color center laser for 3 µm spectra. Three bands were recorded in the 10 µm region; all were characterized by doubling of the transitions with a 3:1 intensity ratio, which is attributed to a torsion-inversion tunneling motion interchanging the two amine hydrogen atoms. The 3 µm band was greatly fractionated due to IVR. From double resonance experiments, each IVR component could be associated with one of the two tunneling states observed in the 10 µm spectrum.
{"title":"Conformational Interchange in the 10 µm and 3µm Infrared Spectra of Propargyl Amine","authors":"A. M. Andrews, G. T. Fraser, B. Pate","doi":"10.1364/hrs.1993.tua4","DOIUrl":"https://doi.org/10.1364/hrs.1993.tua4","url":null,"abstract":"The propargyl amine spectrum was observed using an electric resonance optothermal spectrometer coupled to a CO2 laser-microwave sideband system for measurement of 10 µm spectra and to a color center laser for 3 µm spectra. Three bands were recorded in the 10 µm region; all were characterized by doubling of the transitions with a 3:1 intensity ratio, which is attributed to a torsion-inversion tunneling motion interchanging the two amine hydrogen atoms. The 3 µm band was greatly fractionated due to IVR. From double resonance experiments, each IVR component could be associated with one of the two tunneling states observed in the 10 µm spectrum.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"170 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":"124061226","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}
It is known [1-3], that the samples of atoms with a velocity spread much lower than the recoil velocity uR= ħk/M (k is the wave number of exciting light field, M is the mass of atom) can be obtained by use of velocity selection with stimulated Raman transitions. A theoretical analysis of the velocity selection method is presented in [2,3]. So, it was shown in [2] that the formation of such narrow velocity structures is performed not only by the counterpropagating, but also by co-propagating light waves. This fact allows to form the two-dimensional velocity distribution of the widths δvx,y « uR by the velocity selection technique using laser configuration as in Fig. 1b.
{"title":"Velocity Selection Technique for High-Resolution Spectroscopy","authors":"E. Korsunsky, D. Kosachiov, Y. Rozhdestvensky","doi":"10.1364/hrs.1993.wb5","DOIUrl":"https://doi.org/10.1364/hrs.1993.wb5","url":null,"abstract":"It is known [1-3], that the samples of atoms with a velocity spread much lower than the recoil velocity uR= ħk/M (k is the wave number of exciting light field, M is the mass of atom) can be obtained by use of velocity selection with stimulated Raman transitions. A theoretical analysis of the velocity selection method is presented in [2,3]. So, it was shown in [2] that the formation of such narrow velocity structures is performed not only by the counterpropagating, but also by co-propagating light waves. This fact allows to form the two-dimensional velocity distribution of the widths δvx,y « uR by the velocity selection technique using laser configuration as in Fig. 1b.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"28 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":"129297200","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}
As a technique for high resolution spectroscopy one-photon and photon—gated persistent spectral hole burning was realized in our organic materials. Hole shape, properties and quantum efficiency of hole formation were investicated. Hole growth dynamics and theory for it were given.
{"title":"Persistent spectral hole burning in organic materials","authors":"Liao Jianzhao, Chen Lingbing, Zhao Youyuan, Liang Fuming","doi":"10.1364/hrs.1993.mb8","DOIUrl":"https://doi.org/10.1364/hrs.1993.mb8","url":null,"abstract":"As a technique for high resolution spectroscopy one-photon and photon—gated persistent spectral hole burning was realized in our organic materials. Hole shape, properties and quantum efficiency of hole formation were investicated. Hole growth dynamics and theory for it were given.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"11 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":"114220158","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}
V. Bagnato, L. Marcassa, C. Tao, Y. Wang, J. Weiner
Collisions of ultracold trapped atoms ( T< 1mK) have opened a new field of atomic collisions with abundant opportunities for theory and experiments. Photo-associative ionization (PAI) in sodium atoms has been the first two-body collision Studied in optical traps3. In this process two ground state Na atoms absorb two photons during the course of the collisional encounter. The first absorption at long range put the colliding system on an attractive C3/R3 potential curve, and the two atoms begin to accelerate toward each other. A second absorption promotes the system to a doubly excited Na(3p)+Na(3p) potential curve from which the PAI process takes place at short range.
{"title":"Two-Color Photo-Associative Ionization Collisions between Sodium Atoms","authors":"V. Bagnato, L. Marcassa, C. Tao, Y. Wang, J. Weiner","doi":"10.1364/hrs.1993.pd6","DOIUrl":"https://doi.org/10.1364/hrs.1993.pd6","url":null,"abstract":"Collisions of ultracold trapped atoms ( T< 1mK) have opened a new field of atomic collisions with abundant opportunities for theory and experiments. Photo-associative ionization (PAI) in sodium atoms has been the first two-body collision Studied in optical traps3. In this process two ground state Na atoms absorb two photons during the course of the collisional encounter. The first absorption at long range put the colliding system on an attractive C3/R3 potential curve, and the two atoms begin to accelerate toward each other. A second absorption promotes the system to a doubly excited Na(3p)+Na(3p) potential curve from which the PAI process takes place at short range.","PeriodicalId":109383,"journal":{"name":"High Resolution Spectroscopy","volume":"218 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":"122395277","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}
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