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John S. Muenter - One of the best experts on this subject based on the ideXlab platform.
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dipole moments of hdo in highly excited vibrational states measured by stark induced photofragment quantum beat spectroscopy
Journal of Chemical Physics, 2005Co-Authors: Patrice Theule, A Callegari, Thomas R Rizzo, John S. MuenterAbstract:We report here a measurement of electric dipole moments in highly vibrationally excited HDO molecules. We use photofragment yield detected quantum beat spectroscopy to determine electric field induced splittings of the J=1 rotational levels of HDO excited with 4, 5, and 8 quanta of vibration in the OH stretching mode. The splittings allow us to deduce μa and μb, the projections of dipole moment onto the molecular rotation Inertial axes. We compare the measured HDO dipole moment components with the results of quantitative calculations based on Morse oscillator wave functions and an ab initio dipole moment surface. The vibrational dependence of the dipole moment components reflect both structural and electronic changes in HDO upon vibrational excitation; principally the vibrational dependence of the O–H bond length and bond angle, and the resulting change in orientation of the principal Inertial Coordinate system. The dipole moment data also provide a sensitive test of theoretical dipole moment and potentia...
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dipole moments of hdo in highly excited vibrational states measured by stark induced photofragment quantum beat spectroscopy
Journal of Chemical Physics, 2005Co-Authors: Patrice Theule, A Callegari, Thomas R Rizzo, John S. MuenterAbstract:We report here a measurement of electric dipole moments in highly vibrationally excited HDO molecules. We use photofragment yield detected quantum beat spectroscopy to determine electric field induced splittings of the J=1 rotational levels of HDO excited with 4, 5, and 8 quanta of vibration in the OH stretching mode. The splittings allow us to deduce mu(a) and mu(b), the projections of dipole moment onto the molecular rotation Inertial axes. We compare the measured HDO dipole moment components with the results of quantitative calculations based on Morse oscillator wave functions and an ab initio dipole moment surface. The vibrational dependence of the dipole moment components reflect both structural and electronic changes in HDO upon vibrational excitation; principally the vibrational dependence of the O-H bond length and bond angle, and the resulting change in orientation of the principal Inertial Coordinate system. The dipole moment data also provide a sensitive test of theoretical dipole moment and potential energy surfaces, particularly for molecular configurations far from equilibrium.
Patrice Theule - One of the best experts on this subject based on the ideXlab platform.
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dipole moments of hdo in highly excited vibrational states measured by stark induced photofragment quantum beat spectroscopy
Journal of Chemical Physics, 2005Co-Authors: Patrice Theule, A Callegari, Thomas R Rizzo, John S. MuenterAbstract:We report here a measurement of electric dipole moments in highly vibrationally excited HDO molecules. We use photofragment yield detected quantum beat spectroscopy to determine electric field induced splittings of the J=1 rotational levels of HDO excited with 4, 5, and 8 quanta of vibration in the OH stretching mode. The splittings allow us to deduce μa and μb, the projections of dipole moment onto the molecular rotation Inertial axes. We compare the measured HDO dipole moment components with the results of quantitative calculations based on Morse oscillator wave functions and an ab initio dipole moment surface. The vibrational dependence of the dipole moment components reflect both structural and electronic changes in HDO upon vibrational excitation; principally the vibrational dependence of the O–H bond length and bond angle, and the resulting change in orientation of the principal Inertial Coordinate system. The dipole moment data also provide a sensitive test of theoretical dipole moment and potentia...
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dipole moments of hdo in highly excited vibrational states measured by stark induced photofragment quantum beat spectroscopy
Journal of Chemical Physics, 2005Co-Authors: Patrice Theule, A Callegari, Thomas R Rizzo, John S. MuenterAbstract:We report here a measurement of electric dipole moments in highly vibrationally excited HDO molecules. We use photofragment yield detected quantum beat spectroscopy to determine electric field induced splittings of the J=1 rotational levels of HDO excited with 4, 5, and 8 quanta of vibration in the OH stretching mode. The splittings allow us to deduce mu(a) and mu(b), the projections of dipole moment onto the molecular rotation Inertial axes. We compare the measured HDO dipole moment components with the results of quantitative calculations based on Morse oscillator wave functions and an ab initio dipole moment surface. The vibrational dependence of the dipole moment components reflect both structural and electronic changes in HDO upon vibrational excitation; principally the vibrational dependence of the O-H bond length and bond angle, and the resulting change in orientation of the principal Inertial Coordinate system. The dipole moment data also provide a sensitive test of theoretical dipole moment and potential energy surfaces, particularly for molecular configurations far from equilibrium.
A Callegari - One of the best experts on this subject based on the ideXlab platform.
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dipole moments of hdo in highly excited vibrational states measured by stark induced photofragment quantum beat spectroscopy
Journal of Chemical Physics, 2005Co-Authors: Patrice Theule, A Callegari, Thomas R Rizzo, John S. MuenterAbstract:We report here a measurement of electric dipole moments in highly vibrationally excited HDO molecules. We use photofragment yield detected quantum beat spectroscopy to determine electric field induced splittings of the J=1 rotational levels of HDO excited with 4, 5, and 8 quanta of vibration in the OH stretching mode. The splittings allow us to deduce μa and μb, the projections of dipole moment onto the molecular rotation Inertial axes. We compare the measured HDO dipole moment components with the results of quantitative calculations based on Morse oscillator wave functions and an ab initio dipole moment surface. The vibrational dependence of the dipole moment components reflect both structural and electronic changes in HDO upon vibrational excitation; principally the vibrational dependence of the O–H bond length and bond angle, and the resulting change in orientation of the principal Inertial Coordinate system. The dipole moment data also provide a sensitive test of theoretical dipole moment and potentia...
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dipole moments of hdo in highly excited vibrational states measured by stark induced photofragment quantum beat spectroscopy
Journal of Chemical Physics, 2005Co-Authors: Patrice Theule, A Callegari, Thomas R Rizzo, John S. MuenterAbstract:We report here a measurement of electric dipole moments in highly vibrationally excited HDO molecules. We use photofragment yield detected quantum beat spectroscopy to determine electric field induced splittings of the J=1 rotational levels of HDO excited with 4, 5, and 8 quanta of vibration in the OH stretching mode. The splittings allow us to deduce mu(a) and mu(b), the projections of dipole moment onto the molecular rotation Inertial axes. We compare the measured HDO dipole moment components with the results of quantitative calculations based on Morse oscillator wave functions and an ab initio dipole moment surface. The vibrational dependence of the dipole moment components reflect both structural and electronic changes in HDO upon vibrational excitation; principally the vibrational dependence of the O-H bond length and bond angle, and the resulting change in orientation of the principal Inertial Coordinate system. The dipole moment data also provide a sensitive test of theoretical dipole moment and potential energy surfaces, particularly for molecular configurations far from equilibrium.
Thomas R Rizzo - One of the best experts on this subject based on the ideXlab platform.
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dipole moments of hdo in highly excited vibrational states measured by stark induced photofragment quantum beat spectroscopy
Journal of Chemical Physics, 2005Co-Authors: Patrice Theule, A Callegari, Thomas R Rizzo, John S. MuenterAbstract:We report here a measurement of electric dipole moments in highly vibrationally excited HDO molecules. We use photofragment yield detected quantum beat spectroscopy to determine electric field induced splittings of the J=1 rotational levels of HDO excited with 4, 5, and 8 quanta of vibration in the OH stretching mode. The splittings allow us to deduce μa and μb, the projections of dipole moment onto the molecular rotation Inertial axes. We compare the measured HDO dipole moment components with the results of quantitative calculations based on Morse oscillator wave functions and an ab initio dipole moment surface. The vibrational dependence of the dipole moment components reflect both structural and electronic changes in HDO upon vibrational excitation; principally the vibrational dependence of the O–H bond length and bond angle, and the resulting change in orientation of the principal Inertial Coordinate system. The dipole moment data also provide a sensitive test of theoretical dipole moment and potentia...
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dipole moments of hdo in highly excited vibrational states measured by stark induced photofragment quantum beat spectroscopy
Journal of Chemical Physics, 2005Co-Authors: Patrice Theule, A Callegari, Thomas R Rizzo, John S. MuenterAbstract:We report here a measurement of electric dipole moments in highly vibrationally excited HDO molecules. We use photofragment yield detected quantum beat spectroscopy to determine electric field induced splittings of the J=1 rotational levels of HDO excited with 4, 5, and 8 quanta of vibration in the OH stretching mode. The splittings allow us to deduce mu(a) and mu(b), the projections of dipole moment onto the molecular rotation Inertial axes. We compare the measured HDO dipole moment components with the results of quantitative calculations based on Morse oscillator wave functions and an ab initio dipole moment surface. The vibrational dependence of the dipole moment components reflect both structural and electronic changes in HDO upon vibrational excitation; principally the vibrational dependence of the O-H bond length and bond angle, and the resulting change in orientation of the principal Inertial Coordinate system. The dipole moment data also provide a sensitive test of theoretical dipole moment and potential energy surfaces, particularly for molecular configurations far from equilibrium.
Jeffrey Winicour - One of the best experts on this subject based on the ideXlab platform.
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spectral cauchy characteristic extraction of strain news and gravitational radiation flux
Classical and Quantum Gravity, 2016Co-Authors: Casey J Handmer, Bela Szilagyi, Jeffrey WinicourAbstract:We present a new approach for the Cauchy-characteristic extraction (CCE) of gravitational radiation strain, news function, and the flux of the energy–momentum, supermomentum and angular momentum associated with the Bondi–Metzner–Sachs asymptotic symmetries. In CCE, a characteristic evolution code takes numerical data on an inner worldtube supplied by a Cauchy evolution code, and propagates it outwards to obtain the space–time metric in a neighborhood of null infinity. The metric is first determined in a scrambled form in terms of Coordinates determined by the Cauchy formalism. In prior treatments, the waveform is first extracted from this metric and then transformed into an asymptotic Inertial Coordinate system. This procedure provides the physically proper description of the waveform and the radiated energy but it does not generalize to determine the flux of angular momentum or supermomentum. Here we formulate and implement a new approach which transforms the full metric into an asymptotic Inertial frame and provides a uniform treatment of all the radiation fluxes associated with the asymptotic symmetries. Computations are performed and calibrated using the spectral Einstein code.
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spectral cauchy characteristic extraction of strain news and gravitational radiation flux
arXiv: General Relativity and Quantum Cosmology, 2016Co-Authors: Casey J Handmer, Bela Szilagyi, Jeffrey WinicourAbstract:We present a new approach for the Cauchy-characteristic extraction of gravitational radiation strain, news function, and the flux of the energy-momentum, supermomentum and angular momentum associated with the Bondi-Metzner-Sachs asymptotic symmetries. In Cauchy-characteristic extraction, a characteristic evolution code takes numerical data on an inner worldtube supplied by a Cauchy evolution code, and propagates it outwards to obtain the space-time metric in a neighborhood of null infinity. The metric is first determined in a scrambled form in terms of Coordinates determined by the Cauchy formalism. In prior treatments, the waveform is first extracted from this metric and then transformed into an asymptotic Inertial Coordinate system. This procedure provides the physically proper description of the waveform and the radiated energy but it does not generalize to determine the flux of angular momentum or supermomentum. Here we formulate and implement a new approach which transforms the full metric into an asymptotic Inertial frame and provides a uniform treatment of all the radiation fluxes associated with the asymptotic symmetries. Computations are performed and calibrated using the Spectral Einstein Code (SpEC).