Chemistry Scholarly Works: Recent submissions
Now showing items 441-460 of 629
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Translational energy dependence of reaction mechanism: Xe++CH4→XeH++CH3
(American Institute of Physics, 1981-01-01)The dynamics of the exoergic ion–molecule reaction Xe+(CH4,CH3)XeH+ were studied by chemical accelerator techniques over the relative translational energy range 0.2 to 8 eV. Results of the kinematicmeasurements are reported ... -
Role of impact parameter in branching reactions: Chemical accelerator studies of the reaction Xe++CH4→XeCH3 ++H
(American Institute of Physics, 1981-01-01)Integral reaction cross sections and product velocity distributions have been measured for the ion–molecule reaction Xe+(CH4,H)XeCH3 + over the relative reactant translational energy range of 0.7–5.5 eV by chemical accelerator ... -
Translational energy dependence of cross sections for reactions of OH− (H2O) n with CO2 and SO2
(American Institute of Physics, 1984)A tandem mass spectrometer has been used to measure cross sections for reactions of the solvated negative ions OH−(H2O) n , where 0≤n≤3, with the neutral molecules CO2 and SO2 over the range of reactant translational energy ... -
Rate constants for the reactions of O+ with N2 and O2 as a function of temperature (300–1800 K)
(American Institute of Physics, 1997-01-01)We have studied the rate constants for the reaction of O+ with N2 over the temperature range 300–1600 K and the reaction of O+ with O2 over the range 300 to 1800 K. The results are in good agreement with previous measurements ... -
Rate coefficients for the endothermic reactions C+(^2P)+H2(D2)→CH^+(CD^+)+H(D) as functions of temperature from 400–1300 K
(American Institute of Physics, 1997-03-20)We have measured the bimolecular rate coefficients for the reactions of C+(2P) with H2 and D2 as functions of temperature from 400 to 1300 K using a high temperatureflowing afterglow apparatus. The temperature dependences ... -
P3-[2-(4-hydroxyphenyl)-2-oxo]ethyl ATP for the Rapid Activation of the Na+,K+-ATPase
(Biophysical Society, 2000-09-01)P3-[2-(4-hydroxyphenyl)-2-oxo]ethyl ATP (pHP-caged ATP) has been investigated for its application as a phototrigger for the rapid activation of electrogenic ion pumps. The yield of ATP after irradiation with a XeCl excimer ... -
Vibrational relaxation of CH(2)I(2) in solution: Excitation level dependence
(American Institute of Physics, 2003-03-07)Transient electronic absorption monitors the flow of vibrational energy in methylene iodide (CH(2)I(2)) following excitation of five C–H stretch and stretch–bend modes ranging in energy from 3000 to 9000 cm(−1). Intramolecular ... -
Vibrational relaxation of CH3I in the gas phase and in solution
(American Institute of Physics, 2004-03-30)Transient electronic absorption measurements reveal the vibrational relaxation dynamics of CH(3)I following excitation of the C–H stretch overtone in the gas phase and in liquid solutions. The isolated molecule relaxes ... -
Excitation-energy dependence of the mechanism for two-photon ionization of liquid H2O and D2O from 8.3to12.4eV
(American Institute of Physics, 2006-07-28)Transient absorption measurements monitor the geminate recombination kinetics of solvated electrons following two-photonionization of liquid water at several excitation energies in the range from 8.3to12.4eV. Modeling the ... -
Excited state dynamics of liquid water: Insight from the dissociation reaction following two-photon excitation
(American Institute of Physics, 2007-04-25)The authors use transient absorption spectroscopy to monitor the ionization and dissociation products following two-photon excitation of pure liquid water. The primary decay mechanism changes from dissociation at an ... -
Transient x-ray absorption spectroscopy of hydrated halogen atom
(American Institute of Physics, 2008-02-11)Time-resolved x-ray absorption spectroscopy has been used to observe the transient species generated by one-photon detachment of an electron from aqueous bromide. The K-edge spectrum of the short-lived Br(0) atom exhibits ... -
Electronic structure of liquid water from polarization-dependent two-photon absorption spectroscopy
(American Institute of Physics, 2009-02-26)Two-photon absorption (2PA) spectroscopy in the range from 7 to 10 eV provides new insight on the electronic structure of liquid water. Continuous 2PA spectra are obtained via the pump-probe technique, using broadband probe ... -
Intense Field Multiphoton Ionization via Complex Dressed States: Application to the H Atom
(American Physical Society, 1977-11-07)Extension of Floquet theory to include continuum as well as bound atomic states yields a practical technique for computation of multiphoton ionization rates in the region where rms field strengths approach the strength of ... -
Laser-assisted charge-transfer reactions (Li(3)(+)+H): Coupled dressed-quasimolecular-state approach
(American Physical Society, 1985-07-01)A semiclassical coupled dressed-quasimolecular-states (DQMS) approach is presented for nonperturbative treatment of multichannel charge-transfer reactions at low collision velocities and high laser intensities, incorporating ... -
Floquet-Liouville supermatrix approach: Time development of density-matrix operator and multiphoton resonance fluorescence spectra in intense laser fields
(American Physical Society, 1986-03-01)A Floquet-Liouville supermatrix (FLSM) approach is presented for nonperturbative treatment of the time development of the density-matrix operator of atoms and molecules exposed to intense polychromatic fields. By extending ... -
High-order harmonic generation in atomic hydrogen at 248 nm: Dipole-moment versus acceleration spectrum
(American Physical Society, 1992-12-01)We present a study of the high-order harmonic-generation (HG) spectra of atomic hydrogen at 248 nm based on the Fourier transform of the expectation values of the induced dipole moment and acceleration. The calculations ... -
Molecular-bond hardening and dynamics of molecular stabilization and trapping in intense laser pulses
(American Physical Society, 1993-07-01)We extend our previous study [Chem. Phys. Lett. 197, 413 (1992)] of the molecular stabilization in intense laser fields by considering the dynamical behavior of the H(+)(2) molecules in intense femtosecond short laser ... -
Hydrogen atoms in circularly polarized microwave fields: Near-integrability and ionization
(American Physical Society, 1995-08-01)We have recently found that the hydrogen atom in a circularly polarized (CP) microwave field possesses an approximate dynamical symmetry and its bounded motion can be well described by a three-dimensional integrable (but ... -
Generation of circularly polarized multiple high-order harmonic emission from two-color crossed laser beams
(American Physical Society, 1998-10-01)We present a scheme for the production of circularly polarized multiple high-order harmonic generation (HHG). The proposed experimental setup involves the use of two-color laser fields, consisting of a circularly polarized ... -
Generalized Floquet formulation of time-dependent current-density-functional theory
(American Physical Society, 1998-12-01)We present a generalized Floquet formulation of time-dependent current-density-functional theory for nonperturbative treatment of multiphoton processes of many-electron systems in intense monochromatic electric and magnetic ...