Добірка наукової літератури з теми "Laser Induced Molecular Dissociation"
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Статті в журналах з теми "Laser Induced Molecular Dissociation"
Numico, R., A. Keller, and O. Atabek. "Laser-induced molecular alignment in dissociation dynamics." Physical Review A 52, no. 2 (August 1, 1995): 1298–309. http://dx.doi.org/10.1103/physreva.52.1298.
Повний текст джерелаKato, Shuji, Yoshihiro Makide, Takeshi Tominaga, and Kazuo Takeuchi. "Infrared Multiphoton Dissociation of CF3CHClF: Primary Dissociation and Secondary Photolysis." Laser Chemistry 8, no. 2-4 (January 1, 1988): 211–34. http://dx.doi.org/10.1155/lc.8.211.
Повний текст джерелаHe, X., O. Atabek, and A. Giusti-Suzor. "Laser-induced resonances in molecular dissociation in intense fields." Physical Review A 38, no. 11 (December 1, 1988): 5586–94. http://dx.doi.org/10.1103/physreva.38.5586.
Повний текст джерелаAkram, M., Raheel Ali, and M. A. Baig. "Laser induced molecular dissociation and ionization of potassium vapour." Optics Communications 136, no. 5-6 (April 1997): 390–94. http://dx.doi.org/10.1016/s0030-4018(96)00713-4.
Повний текст джерелаHoang Man, Viet, Nguyen-Thi Van-Oanh, Philippe Derreumaux, Mai Suan Li, Christopher Roland, Celeste Sagui, and 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.
Повний текст джерелаCsehi, András, Gábor J. Halász, Lorenz S. Cederbaum, and 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.
Повний текст джерелаAbeln, B., J. V. Hernández, F. Anis, and 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 (July 7, 2010): 155005. http://dx.doi.org/10.1088/0953-4075/43/15/155005.
Повний текст джерелаLai, G. D., Y. L. Zhao, S. N. Luo, and 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.
Повний текст джерелаAlexander, 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 (July 16, 2009): 154027. http://dx.doi.org/10.1088/0953-4075/42/15/154027.
Повний текст джерелаZhang, Wei, Lirong Bao, Kexin Jiang, Anran Shi, Ruiqi Shen, and 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 (September 2018): 308–12. http://dx.doi.org/10.1017/s0263034618000290.
Повний текст джерелаДисертації з теми "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.
Повний текст джерелаDepartment 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.
Повний текст джерелаFischer, Andreas [Verfasser], and 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.
Повний текст джерелаFolkerts, 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.
Повний текст джерелаPurcell, 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/.
Повний текст джерелаMcKendrick, Colin Bruce. "UV laser multiphoton dissociation studies of H2O, NO2 and H2O2." Thesis, University of Edinburgh, 1986. http://hdl.handle.net/1842/12630.
Повний текст джерелаZohrabi, Mohammad. "Quantum control of molecular fragmentation in strong laser field." Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18401.
Повний текст джерелаDepartment 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.
Повний текст джерелаDepartment 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.
Повний текст джерелаMakhija, Varun. "Laser-induced rotational dynamics as a route to molecular frame measurements." Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18522.
Повний текст джерелаDepartment 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.
Книги з теми "Laser Induced Molecular Dissociation"
Williamson, James Michael Bruce. Laser induced fluorescence characterization of molecular photofragments. 1987.
Знайти повний текст джерелаBalakrishnan, Ashtok *. Extreme ultraviolet laser spectroscopy: a determination of the dissociation energy of molecular hydrogen. 1988.
Знайти повний текст джерелаNorthrup, Frederick James. Applications of vacuum ultraviolet laser-induced fluorescence to studies of molecular dynamics. 1985.
Знайти повний текст джерелаHe, Guang S. Laser Stimulated Scattering and Multiphoton Excitation. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780192895615.001.0001.
Повний текст джерелаЧастини книг з теми "Laser Induced Molecular Dissociation"
Sudbø, A. S., P. A. Schulz, Y. R. Shen, and Y. T. Lee. "Molecular-Beam Studies of Laser-Induced Multiphoton Dissociation." In Topics in Current Physics, 95–122. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82292-6_3.
Повний текст джерелаBjerre, N., and S. R. Keiding. "Laser/Electric Field Dissociation Spectroscopy of Molecular Ions." In Laser Spectroscopy VIII, 202–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-540-47973-4_54.
Повний текст джерелаKulander, K. C., F. H. Mies, and K. J. Schafer. "Dynamics of Multiphoton Molecular Ionization and Dissociation." In Super-Intense Laser-Atom Physics IV, 163–69. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0261-9_16.
Повний текст джерелаZhao, Min, Wankun Xie, Travis W. Hein, Lih Kuo, and Robert H. Rosa. "Laser-Induced Choroidal Neovascularization in Rats." In Methods in Molecular Biology, 77–85. New York, NY: Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-1480-8_9.
Повний текст джерелаGuo, Chunlei. "Slowing down molecular dissociation in strong laser fields." In Ultrafast Phenomena XV, 564–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-68781-8_182.
Повний текст джерелаPapagiannakopoulos, P., and D. Zevgolis. "Laser Emission at 502nm Induced by KrF Laser Multiphoton Dissociation of HgBr2." In Advances in Chemical Reaction Dynamics, 475–82. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4734-4_30.
Повний текст джерелаStenholm, S. "Laser-Induced Processes in Molecular Systems." In Springer Proceedings in Physics, 313–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-79101-7_33.
Повний текст джерелаHoheisel, W., U. Schulte, M. Vollmer, and F. Träger. "Optical spectra and laser-induced dissociation of supported Na particles." In 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.
Повний текст джерелаKurizki, G., and A. Ben-Reuven. "Time-Resolved Photofragment Fluorescence as a Probe of Laser-Pulse Molecular Dissociation." In Methods of Laser Spectroscopy, 443–48. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-9459-8_60.
Повний текст джерелаMort, Andrew, and Xiangmei Wu. "Capillary Electrophoresis with Detection by Laser-Induced Fluorescence." In Methods in Molecular Biology, 93–102. Totowa, NJ: Humana Press, 2010. http://dx.doi.org/10.1007/978-1-61779-008-9_6.
Повний текст джерелаТези доповідей конференцій з теми "Laser Induced Molecular Dissociation"
Morin, P. "Free Electron Laser Induced Dissociation of Molecules Probed with Synchrotron Radiation." In Free-Electron Laser Applications in the Ultraviolet. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/fel.1988.wc2.
Повний текст джерелаKazaryan, Mishik A., Yuri A. Dyakov, Maksim G. Golubkov, Dina P. Gubanova, Nikolay A. Bulychev, and Serine M. Kazaryan. "Laser-induced dissociation processes of protonated glucose: dehydration reactions vs cross-ring dissociation." In XIII International Conference on Atomic and Molecular Pulsed Lasers, edited by Andrei M. Kabanov and Victor F. Tarasenko. SPIE, 2018. http://dx.doi.org/10.1117/12.2303528.
Повний текст джерелаLudwig, J., H. Rottke, and W. Sandner. "Molecular Hydrogen in an Intense Light Field." In Applications of High Field and Short Wavelength Sources. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/hfsw.1997.fd6.
Повний текст джерелаLiu, W. K., W. H. Fletcher, and D. W. Noid. "Laser-induced dissociation dynamics in triatomic molecules." In AIP Conference Proceedings Volume 146. AIP, 1986. http://dx.doi.org/10.1063/1.35736.
Повний текст джерелаBrannon, James H. "Chemical Etching of Silicon by CO2 Laser Induced Dissociation of NF3." In Microphysics of Surfaces, Beams, and Adsorbates. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/msba.1987.mb3.
Повний текст джерелаKodama, Yutaka, and Heihachi Sato. "Effect of Molecular Sieve on Transient Output-Reduction and Laser Parameters in DC Discharged /Room Temperature Operated FAF CO Laser." In 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.
Повний текст джерелаLiang, Zhi, Hai-Lung Tsai, and Lan Jiang. "Determination of Laser Absorption Coefficients of Gas Mixtures Using an Ab Initio MD Model." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41449.
Повний текст джерелаBotter, R., I. Dimicoli, and J. Lemaire. "Rempi Studies Of Laser Induced Dissociation Oe Polyatomic Molecules And Ions." In 1986 Quebec Symposium, edited by D. K. Evans. SPIE, 1986. http://dx.doi.org/10.1117/12.938936.
Повний текст джерелаSanche., Léon. "Interaction of Low-Energy Electrons With Adsorbed Molecules: Mechanisms of Energy Transfer and Dissociation." In The Microphysics of Surfaces: Beam-Induced Processes. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/msbip.1991.mc2.
Повний текст джерелаWalkup, Robert E. "Femtosecond time-resolved absorption spectroscopy." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.thdd1.
Повний текст джерелаЗвіти організацій з теми "Laser Induced Molecular Dissociation"
Lewis, Aaron. Fundamental Studies in the Molecular Basis of Laser Induced Retinal Damage. Fort Belvoir, VA: Defense Technical Information Center, January 1988. http://dx.doi.org/10.21236/ada203634.
Повний текст джерелаLewis, Aaron. Fundamental Studies in the Molecular Basis of Laser Induced Retinal Damage. Fort Belvoir, VA: Defense Technical Information Center, April 1991. http://dx.doi.org/10.21236/ada239941.
Повний текст джерелаShomer, Ilan, Ruth E. Stark, Victor Gaba, and 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, November 2002. http://dx.doi.org/10.32747/2002.7587238.bard.
Повний текст джерелаDroby, Samir, Michael Wisniewski, Ron Porat, and Dumitru Macarisin. Role of Reactive Oxygen Species (ROS) in Tritrophic Interactions in Postharvest Biocontrol Systems. United States Department of Agriculture, December 2012. http://dx.doi.org/10.32747/2012.7594390.bard.
Повний текст джерела