Littérature scientifique sur le sujet « Laser Induced Molecular Dissociation »
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Articles de revues sur le sujet "Laser Induced Molecular Dissociation"
Numico, R., A. Keller et O. Atabek. « Laser-induced molecular alignment in dissociation dynamics ». Physical Review A 52, no 2 (1 août 1995) : 1298–309. http://dx.doi.org/10.1103/physreva.52.1298.
Texte intégralKato, Shuji, Yoshihiro Makide, Takeshi Tominaga et Kazuo Takeuchi. « Infrared Multiphoton Dissociation of CF3CHClF : Primary Dissociation and Secondary Photolysis ». Laser Chemistry 8, no 2-4 (1 janvier 1988) : 211–34. http://dx.doi.org/10.1155/lc.8.211.
Texte intégralHe, X., O. Atabek et A. Giusti-Suzor. « Laser-induced resonances in molecular dissociation in intense fields ». Physical Review A 38, no 11 (1 décembre 1988) : 5586–94. http://dx.doi.org/10.1103/physreva.38.5586.
Texte intégralAkram, M., Raheel Ali et M. A. Baig. « Laser induced molecular dissociation and ionization of potassium vapour ». Optics Communications 136, no 5-6 (avril 1997) : 390–94. http://dx.doi.org/10.1016/s0030-4018(96)00713-4.
Texte intégralHoang Man, Viet, Nguyen-Thi Van-Oanh, Philippe Derreumaux, Mai Suan Li, Christopher Roland, Celeste Sagui et Phuong H. Nguyen. « Picosecond infrared laser-induced all-atom nonequilibrium molecular dynamics simulation of dissociation of viruses ». Physical Chemistry Chemical Physics 18, no 17 (2016) : 11951–58. http://dx.doi.org/10.1039/c5cp07711g.
Texte intégralCsehi, András, Gábor J. Halász, Lorenz S. Cederbaum et Ágnes Vibók. « Towards controlling the dissociation probability by light-induced conical intersections ». Faraday Discussions 194 (2016) : 479–93. http://dx.doi.org/10.1039/c6fd00139d.
Texte intégralAbeln, B., J. V. Hernández, F. Anis et B. D. Esry. « Comparison of theoretical analyses of intense-laser-induced molecular dissociation ». Journal of Physics B : Atomic, Molecular and Optical Physics 43, no 15 (7 juillet 2010) : 155005. http://dx.doi.org/10.1088/0953-4075/43/15/155005.
Texte intégralLai, G. D., Y. L. Zhao, S. N. Luo et J. C. Shi. « Influence of the molecular structure on heterocyclic-ring dissociation kinetics and structural evolution of laser-induced plasmas ». Journal of Analytical Atomic Spectrometry 36, no 8 (2021) : 1742–49. http://dx.doi.org/10.1039/d1ja00166c.
Texte intégralAlexander, J. D., C. R. Calvert, R. B. King, O. Kelly, W. A. Bryan, G. R. A. J. Nemeth, W. R. Newell et al. « Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions ». Journal of Physics B : Atomic, Molecular and Optical Physics 42, no 15 (16 juillet 2009) : 154027. http://dx.doi.org/10.1088/0953-4075/42/15/154027.
Texte intégralZhang, Wei, Lirong Bao, Kexin Jiang, Anran Shi, Ruiqi Shen et Yinghua Ye. « Identification and formation mechanism of the transient ion fragments produced in laser-induced dissociation of 1, 1-diamino-2, 2-dinitroethylene ». Laser and Particle Beams 36, no 3 (septembre 2018) : 308–12. http://dx.doi.org/10.1017/s0263034618000290.
Texte intégralThèses sur le sujet "Laser Induced Molecular Dissociation"
Gaire, Bishwanath. « Imaging of slow dissociation of the laser induced fragmentation of molecular ions ». Diss., Kansas State University, 2011. http://hdl.handle.net/2097/8852.
Texte intégralDepartment of Physics
Itzhak Ben-Itzhak
Lasers are being used widely for the study and manipulation of the dynamics of atomic and molecular targets, and advances in laser technology makes it possible to explore new areas of research — for example attosecond physics. In order to probe the fragmentation dynamics of molecular ions, we have developed a coincidence three-dimensional momentum imaging method that allows the kinematically complete study of all fragments except electrons. Recent upgrades to this method allow the measurement of slow dissociation fragments, down to nearly zero velocity, in intense ultrafast laser fields. Evidences for the low energy breakup are presented using the benchmark molecules diatomic H[subscript]2[superscript]+ and polyatomic H[subscript]3[superscript]+ . The low energy fragments in H[subscript]2[superscript]+ dissociation are due to the intriguing zero-photon dissociation phenomenon. This first experimental evidence for the zero-photon dissociation is further supported by sophisticated theoretical treatment. We have explored the laser pulse length, intensity, wavelength, and chirp dependence of zero-photon dissociation of H[subscript]2[superscript]+, and the results are well described by a two-photon process based on stimulated Raman scattering. Similar studies of the slow dissociation of H[subscript]3[superscript]+ reveal that two-body dissociation is dominant over three-body dissociation. The most likely pathways leading to low-energy breakup into H[superscript]++H[subscript]2, in contradiction to the assessments of the channels in at least one previous study, are explored by varying the laser pulse duration and the wavelength. In addition, we have investigated the dissociation and single ionization of N[subscript]2[superscript]+ , and an interesting high energy feature in addition to the low energy has been observed at higher intensities. Such high energy results from the breakup of molecules in excited states are accessible at higher intensities where their potential energy is changing rapidly with the internuclear distance. We have extended the intense field ionization studies to other molecular ions N[subscript]2[superscript]+ , CO[superscript]+, NO[superscript]+, and O[subscript]2[superscript]+ . The dissociative ionization of these molecules follow a general mechanism, a stairstep ionization mechanism. Utilizing the capability of the upgraded experimental method we have measured the non-dissociative and dissociative ionization of CO[superscript]+ using different pulse lengths. The results suggest that dissociative ionization can be manipulated by suppressing some ionization paths.
Ray, Dipanwita. « Photo-electron momentum distribution and electron localization studies from laser-induced atomic and molecular dissociations ». Diss., Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/3901.
Texte intégralFischer, Andreas [Verfasser], et Robert [Akademischer Betreuer] Moshammer. « Dissociative Photoionization of Molecular Hydrogen - A Joint Experimental and Theoretical Study of the Electron-Electron Correlations induced by XUV Photoionization and Nuclear Dynamics on IR-Laser Dressed Transition States / Andreas Fischer ; Betreuer : Robert Moshammer ». Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180301552/34.
Texte intégralFolkerts, Hein Otto. « Molecular dissociation induced by electron transfer to multicharged ions ». [S.l. : [Groningen] : s.n.] ; [University Library Groningen] [Host], 1996. http://irs.ub.rug.nl/ppn/14544757X.
Texte intégralPurcell, S. M. « Laser induced molecular motion in strong nonresonant laser fields ». Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/19225/.
Texte intégralMcKendrick, Colin Bruce. « UV laser multiphoton dissociation studies of H2O, NO2 and H2O2 ». Thesis, University of Edinburgh, 1986. http://hdl.handle.net/1842/12630.
Texte intégralZohrabi, Mohammad. « Quantum control of molecular fragmentation in strong laser field ». Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18401.
Texte intégralDepartment of Physics
Itzhak Ben-Itzhak
Present advances in laser technology allow the production of ultrashort (≲5 fs, approaching single cycle at 800 nm), intense tabletop laser pulses. At these high intensities laser-matter interactions cannot be described with perturbation theory since multiphoton processes are involved. This is in contrast to photodissociation by the absorption of a single photon, which is well described by perturbation theory. For example, at high intensities (≳5×10[superscript]13 W/cm[superscript]2) the fragmentation of molecular hydrogen ions has been observed via the absorption of three or more photons. In another example, an intriguing dissociation mechanism has been observed where molecular hydrogen ions seem to fragment by apparently absorbing no photons. This is actually a two photon process, photoabsorption followed by stimulated emission, resulting in low energy fragments. We are interested in exploring these kinds of multiphoton processes. Our research group has studied the dynamics and control of fragmentation induced by strong laser fields in a variety of molecular targets. The main goal is to provide a basic understanding of fragmentation mechanisms and possible control schemes of benchmark systems such as H[subscript]2[superscript]+. This knowledge is further extended to more complex systems like the benchmark H[subscript]3[superscript]+ polyatomic and other molecules. In this dissertation, we report research based on two types of experiments. In the first part, we describe laser-induced fragmentation of molecular ion-beam targets. In the latter part, we discuss the formation of highly-excited neutral fragments from hydrogen molecules using ultrashort laser pulses. In carrying out these experiments, we have also extended experimental techniques beyond their previous capabilities. We have performed a few experiments to advance our understanding of laser-induced fragmentation of molecular-ion beams. For instance, we explored vibrationally resolved spectra of O[subscript]2[superscript]+ dissociation using various wavelengths. We observed a vibrational suppression effect in the dissociation spectra due to the small magnitude of the dipole transition moment, which depends on the photon energy --- a phenomenon known as Cooper minima. By changing the laser wavelength, the Cooper minima shift, a fact that was used to identify the dissociation pathways. In another project, we studied the carrier-envelope phase (CEP) dependences of highly-excited fragments from hydrogen molecules. General CEP theory predicts a CEP dependence in the total dissociation yield due to the interference of dissociation pathways differing by an even net number of photons, and our measurements are consistent with this prediction. Moreover, we were able to extract the difference in the net number of photons involved in the interfering pathways by using a Fourier analysis. In terms of our experimental method, we have implemented a pump-probe style technique on a thin molecular ion-beam target and explored the feasibility of such experiments. The results presented in this work should lead to a better understanding of the dynamics and control in molecular fragmentation induced by intense laser fields.
Ablikim, Utuq. « Fragmentation of molecular ions in ultrafast laser pulses ». Kansas State University, 2015. http://hdl.handle.net/2097/18962.
Texte intégralDepartment of Physics
Itzhak Ben-Itzhak
Imaging the interaction of molecular ion beams with ultrafast intense laser fields is a very powerful method to understand the fragmentation dynamics of molecules. Femtosecond laser pulses with different wavelengths and intensities are applied to dissociate and ionize molecular ions, and each resulting fragmentation channel can be studied separately by implementing a coincidence three-dimensional (3D) momentum imaging method. The work presented in this master’s report can be separated into two parts. First, the interaction between molecular ion beams and femtosecond laser pulses, in particular, the dissociation of CO[superscript]+ into C[superscript]++O, is studied. For that purpose, measurements are conducted at different laser intensities and wavelengths to investigate the possible pathways of dissociation into C[superscript]++O. The study reveals that CO[superscript]+ starts to dissociate from the quartet electronic state at low laser intensities. Higher laser intensity measurements, in which a larger number of photons can be absorbed by the molecule, show that the doublet electronic states with deeper potential wells, e.g. A [superscript]2Π, contribute to the dissociation of the molecule. In addition, the three-body fragmentation of CO[subscript]2[superscript]+ into C[superscript]++O[superscript]++O[superscript]+ is studied, and two breakup scenarios are separated using the angle between the sum and difference of the momentum vectors of two O[superscript]+ fragments. In the second part, improvements in experimental techniques are discussed. Development of a reflective telescope setup intended to increase the conversion efficiency of ultraviolet (UV) laser pulse generation is described, and the setup is used in the studies of CO[superscript]+ dissociation described in this report. The other technical study presented here is the measurement of the position dependence of timing signals picked off of a microchannel plate (MCP) surface. The experimental method is presented and significant time spread over the surface of the MCP detector is reported [1].
Chen, Hongxin. « Electromagnetically induced transparency in laser-cooled rubidium ». Thesis, Open University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265348.
Texte intégralMakhija, Varun. « Laser-induced rotational dynamics as a route to molecular frame measurements ». Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18522.
Texte intégralDepartment of Physics
Vinod Kumarappan
In general, molecules in the gas phase are free to rotate, and measurements made on such samples are averaged over a randomly oriented distribution of molecules. Any orientation dependent information is lost in such measurements. The goal of the work presented here is to a) mitigate or completely do away with orientational averaging, and b) make fully resolved orientation dependent measurements. In pursuance of similar goals, over the past 50 years chemists and physicists have developed techniques to align molecules, or to measure their orientation and tag other quantities of interest with the orientation. We focus on laser induced alignment of asymmetric top molecules. The first major contribution of our work is the development of an effective method to align all molecular axes under field-free conditions. The method employs a sequence of nonresonant, impulsive laser pulses with varied ellipticities. The efficacy of the method is first demonstrated by solution of the time dependent Schr\"{o}dinger equation for iodobenzene, and then experimentally implemented to three dimensionally align 3,5 difluoroiodobenzene. Measurement from molecules aligned in this manner greatly reduces orientational averaging. The technique was developed via a thorough understanding and extensive computations of the dynamics of rotationally excited asymmetric top molecules. The second, and perhaps more important, contribution of our work is the development of a new measurement technique to extract the complete orientation dependence of a variety of molecular processes initiated by ultrashort laser pulses. The technique involves pump-probe measurements of the process of interest from a rotational wavepacket generated by impulsive excitation of asymmetric top molecules. We apply it to make the first measurement of the single ionization probability of an asymmetric top molecule in a strong field as a function of all relevant alignment angles. The measurement and associated calculations help identify the orbital from which the electron is ionized. We expect that this technique will be widely applicable to ultrafast-laser driven processes in molecules and provide unique insight into molecular physics and chemistry.
Livres sur le sujet "Laser Induced Molecular Dissociation"
Williamson, James Michael Bruce. Laser induced fluorescence characterization of molecular photofragments. 1987.
Trouver le texte intégralBalakrishnan, Ashtok *. Extreme ultraviolet laser spectroscopy : a determination of the dissociation energy of molecular hydrogen. 1988.
Trouver le texte intégralNorthrup, Frederick James. Applications of vacuum ultraviolet laser-induced fluorescence to studies of molecular dynamics. 1985.
Trouver le texte intégralHe, Guang S. Laser Stimulated Scattering and Multiphoton Excitation. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780192895615.001.0001.
Texte intégralChapitres de livres sur le sujet "Laser Induced Molecular Dissociation"
Sudbø, A. S., P. A. Schulz, Y. R. Shen et Y. T. Lee. « Molecular-Beam Studies of Laser-Induced Multiphoton Dissociation ». Dans Topics in Current Physics, 95–122. Berlin, Heidelberg : Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82292-6_3.
Texte intégralBjerre, N., et S. R. Keiding. « Laser/Electric Field Dissociation Spectroscopy of Molecular Ions ». Dans Laser Spectroscopy VIII, 202–5. Berlin, Heidelberg : Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-540-47973-4_54.
Texte intégralKulander, K. C., F. H. Mies et K. J. Schafer. « Dynamics of Multiphoton Molecular Ionization and Dissociation ». Dans Super-Intense Laser-Atom Physics IV, 163–69. Dordrecht : Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0261-9_16.
Texte intégralZhao, Min, Wankun Xie, Travis W. Hein, Lih Kuo et Robert H. Rosa. « Laser-Induced Choroidal Neovascularization in Rats ». Dans Methods in Molecular Biology, 77–85. New York, NY : Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-1480-8_9.
Texte intégralGuo, Chunlei. « Slowing down molecular dissociation in strong laser fields ». Dans Ultrafast Phenomena XV, 564–66. Berlin, Heidelberg : Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-68781-8_182.
Texte intégralPapagiannakopoulos, P., et D. Zevgolis. « Laser Emission at 502nm Induced by KrF Laser Multiphoton Dissociation of HgBr2 ». Dans Advances in Chemical Reaction Dynamics, 475–82. Dordrecht : Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4734-4_30.
Texte intégralStenholm, S. « Laser-Induced Processes in Molecular Systems ». Dans Springer Proceedings in Physics, 313–20. Berlin, Heidelberg : Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-79101-7_33.
Texte intégralHoheisel, W., U. Schulte, M. Vollmer et F. Träger. « Optical spectra and laser-induced dissociation of supported Na particles ». Dans Small Particles and Inorganic Clusters, 831–33. Berlin, Heidelberg : Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76178-2_199.
Texte intégralKurizki, G., et A. Ben-Reuven. « Time-Resolved Photofragment Fluorescence as a Probe of Laser-Pulse Molecular Dissociation ». Dans Methods of Laser Spectroscopy, 443–48. Boston, MA : Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-9459-8_60.
Texte intégralMort, Andrew, et Xiangmei Wu. « Capillary Electrophoresis with Detection by Laser-Induced Fluorescence ». Dans Methods in Molecular Biology, 93–102. Totowa, NJ : Humana Press, 2010. http://dx.doi.org/10.1007/978-1-61779-008-9_6.
Texte intégralActes de conférences sur le sujet "Laser Induced Molecular Dissociation"
Morin, P. « Free Electron Laser Induced Dissociation of Molecules Probed with Synchrotron Radiation ». Dans Free-Electron Laser Applications in the Ultraviolet. Washington, D.C. : Optica Publishing Group, 1988. http://dx.doi.org/10.1364/fel.1988.wc2.
Texte intégralKazaryan, Mishik A., Yuri A. Dyakov, Maksim G. Golubkov, Dina P. Gubanova, Nikolay A. Bulychev et Serine M. Kazaryan. « Laser-induced dissociation processes of protonated glucose : dehydration reactions vs cross-ring dissociation ». Dans XIII International Conference on Atomic and Molecular Pulsed Lasers, sous la direction de Andrei M. Kabanov et Victor F. Tarasenko. SPIE, 2018. http://dx.doi.org/10.1117/12.2303528.
Texte intégralLudwig, J., H. Rottke et W. Sandner. « Molecular Hydrogen in an Intense Light Field ». Dans Applications of High Field and Short Wavelength Sources. Washington, D.C. : Optica Publishing Group, 1997. http://dx.doi.org/10.1364/hfsw.1997.fd6.
Texte intégralLiu, W. K., W. H. Fletcher et D. W. Noid. « Laser-induced dissociation dynamics in triatomic molecules ». Dans AIP Conference Proceedings Volume 146. AIP, 1986. http://dx.doi.org/10.1063/1.35736.
Texte intégralBrannon, James H. « Chemical Etching of Silicon by CO2 Laser Induced Dissociation of NF3 ». Dans Microphysics of Surfaces, Beams, and Adsorbates. Washington, D.C. : Optica Publishing Group, 1987. http://dx.doi.org/10.1364/msba.1987.mb3.
Texte intégralKodama, Yutaka, et Heihachi Sato. « Effect of Molecular Sieve on Transient Output-Reduction and Laser Parameters in DC Discharged /Room Temperature Operated FAF CO Laser ». Dans The European Conference on Lasers and Electro-Optics. Washington, D.C. : Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cthj5.
Texte intégralLiang, Zhi, Hai-Lung Tsai et Lan Jiang. « Determination of Laser Absorption Coefficients of Gas Mixtures Using an Ab Initio MD Model ». Dans ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41449.
Texte intégralBotter, R., I. Dimicoli et J. Lemaire. « Rempi Studies Of Laser Induced Dissociation Oe Polyatomic Molecules And Ions ». Dans 1986 Quebec Symposium, sous la direction de D. K. Evans. SPIE, 1986. http://dx.doi.org/10.1117/12.938936.
Texte intégralSanche., Léon. « Interaction of Low-Energy Electrons With Adsorbed Molecules : Mechanisms of Energy Transfer and Dissociation ». Dans The Microphysics of Surfaces : Beam-Induced Processes. Washington, D.C. : Optica Publishing Group, 1991. http://dx.doi.org/10.1364/msbip.1991.mc2.
Texte intégralWalkup, Robert E. « Femtosecond time-resolved absorption spectroscopy ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.thdd1.
Texte intégralRapports d'organisations sur le sujet "Laser Induced Molecular Dissociation"
Lewis, Aaron. Fundamental Studies in the Molecular Basis of Laser Induced Retinal Damage. Fort Belvoir, VA : Defense Technical Information Center, janvier 1988. http://dx.doi.org/10.21236/ada203634.
Texte intégralLewis, Aaron. Fundamental Studies in the Molecular Basis of Laser Induced Retinal Damage. Fort Belvoir, VA : Defense Technical Information Center, avril 1991. http://dx.doi.org/10.21236/ada239941.
Texte intégralShomer, Ilan, Ruth E. Stark, Victor Gaba et James D. Batteas. Understanding the hardening syndrome of potato (Solanum tuberosum L.) tuber tissue to eliminate textural defects in fresh and fresh-peeled/cut products. United States Department of Agriculture, novembre 2002. http://dx.doi.org/10.32747/2002.7587238.bard.
Texte intégralDroby, Samir, Michael Wisniewski, Ron Porat et Dumitru Macarisin. Role of Reactive Oxygen Species (ROS) in Tritrophic Interactions in Postharvest Biocontrol Systems. United States Department of Agriculture, décembre 2012. http://dx.doi.org/10.32747/2012.7594390.bard.
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