Femtosecond spectroscopy of solid hydrogen - diss.fu
... A two dimensional, spectrally and time resolved Raman technique that is sensitive to induced anisotropies was introduced on gaseous and liquid para-hydrogen samples, and subsequently carried to the solid phase. Thereby, rotational alignment dynamics with periods of about 94 fs, corresponding to the ...
... A two dimensional, spectrally and time resolved Raman technique that is sensitive to induced anisotropies was introduced on gaseous and liquid para-hydrogen samples, and subsequently carried to the solid phase. Thereby, rotational alignment dynamics with periods of about 94 fs, corresponding to the ...
Magneto-optical Kerr effect (MOKE)
... Selection rules of electric-dipole transitions: Electric dipole transition is allowed when following conditions are fulfilled: Energy: Ef − Ei = ~ω (absorbed photon energy is difference between energies of the final and initial electron states) Momentum: ~ω/c ≈ 0 (photon has negligible momentum comp ...
... Selection rules of electric-dipole transitions: Electric dipole transition is allowed when following conditions are fulfilled: Energy: Ef − Ei = ~ω (absorbed photon energy is difference between energies of the final and initial electron states) Momentum: ~ω/c ≈ 0 (photon has negligible momentum comp ...
Vibrational signatures of Hydrogen bonding in the protonated
... vibrational predissociation spectrum of the messenger atom tagged species N2H7+·Ar, suggesting that the IRMPD technique does yield reliable vibrational energies in this case, even though the absorption of many IR photons is required to induce fragmentation of N2H7+ (D0 = 9440 cm-1) to form NH4+ + NH ...
... vibrational predissociation spectrum of the messenger atom tagged species N2H7+·Ar, suggesting that the IRMPD technique does yield reliable vibrational energies in this case, even though the absorption of many IR photons is required to induce fragmentation of N2H7+ (D0 = 9440 cm-1) to form NH4+ + NH ...
Sructural and chemisorption properties of metallic surfaces and metallic overlayers
... Hydrogen adsorption on both Nb(110) and W(110) surfaces results in structural changes on both surfaces. For the Nb(110) surface, exposure to hydrogen induces two stages of change, an initial abrupt change due to chemisorption at the surface, and then a gradual change due to the absorption of hydroge ...
... Hydrogen adsorption on both Nb(110) and W(110) surfaces results in structural changes on both surfaces. For the Nb(110) surface, exposure to hydrogen induces two stages of change, an initial abrupt change due to chemisorption at the surface, and then a gradual change due to the absorption of hydroge ...
Infrared Multiphoton Dissociation Spectroscopy of a Gas
... 1800 cm−1 was interpreted using a computational study based on density functional theory. The predicted vibrational frequencies are in good agreement with the measured values, with an average deviation of only 8 cm−1 (<1%) and a maximum deviation of 21 cm−1 (<2%). The only IR peak assigned to the li ...
... 1800 cm−1 was interpreted using a computational study based on density functional theory. The predicted vibrational frequencies are in good agreement with the measured values, with an average deviation of only 8 cm−1 (<1%) and a maximum deviation of 21 cm−1 (<2%). The only IR peak assigned to the li ...
Laser cooling and trapping of atoms
... laser cooling. One of the characteristics of optical control of atomic motion is that the speed of atoms can be considerably reduced. Since the spread of velocities of a sample of atoms is directly related to its temperature, the field has been dubbed laser cooling, and this name has persisted throug ...
... laser cooling. One of the characteristics of optical control of atomic motion is that the speed of atoms can be considerably reduced. Since the spread of velocities of a sample of atoms is directly related to its temperature, the field has been dubbed laser cooling, and this name has persisted throug ...
Ultrafast optical spectroscopy of surface
... pulses (directly doubled from 800-nm laser pulses), and the other 800nm beam was used to generate the broadband white-light probe pulses in the 4002800 nm range by focusing it into a 2-mm-thick water cell. Both the white light and pump light are focused on the sample and overlap with each other in s ...
... pulses (directly doubled from 800-nm laser pulses), and the other 800nm beam was used to generate the broadband white-light probe pulses in the 4002800 nm range by focusing it into a 2-mm-thick water cell. Both the white light and pump light are focused on the sample and overlap with each other in s ...
EGAS41
... T. Carette, M. Nemouchi, M.R. Godefroid, P. Jönsson CP 14, p74 A theoretical study of the isotope shift on electron affinity of chlorine T. Carette, M.R. Godefroid CP 15, p75 Nonresonant corrections for the optical resonance frequency measurements in hydrogen atom L. Labzowsky, G. Schedrin, D. Solo ...
... T. Carette, M. Nemouchi, M.R. Godefroid, P. Jönsson CP 14, p74 A theoretical study of the isotope shift on electron affinity of chlorine T. Carette, M.R. Godefroid CP 15, p75 Nonresonant corrections for the optical resonance frequency measurements in hydrogen atom L. Labzowsky, G. Schedrin, D. Solo ...
G 3 Geochemistry Geophysics
... Hydrothermal Field and Hydrate Ridge in July 2004. The first in situ Raman spectra of hydrothermal minerals, fluids, and bacterial mats were obtained. These spectra were analyzed and compared to laboratory Raman measurements of standards and samples collected from the site. Spectra of vent fluid (2 ...
... Hydrothermal Field and Hydrate Ridge in July 2004. The first in situ Raman spectra of hydrothermal minerals, fluids, and bacterial mats were obtained. These spectra were analyzed and compared to laboratory Raman measurements of standards and samples collected from the site. Spectra of vent fluid (2 ...
Physics Research A
... TOF information. In order to identify the Kþ particles, the huge background of scattered pions is suppressed using the signal from the threshold Cherenkov detector. Pions with TOF signals smaller than the peak maximum ( 17 ns) do not contaminate any other particles and they can be used to determine ...
... TOF information. In order to identify the Kþ particles, the huge background of scattered pions is suppressed using the signal from the threshold Cherenkov detector. Pions with TOF signals smaller than the peak maximum ( 17 ns) do not contaminate any other particles and they can be used to determine ...
Fluorescence of coumarins and xanthenes after two
... for Rhodamines by Bradley et al.5 and Hermann and Ducuing6 at ruby and neodymium frequencies for which results of the two-photon cross sections were given.6,7 Two-photon absorption is of interest in spectroscopy because two-photon transitions are governed by different selection rules than one-photon ...
... for Rhodamines by Bradley et al.5 and Hermann and Ducuing6 at ruby and neodymium frequencies for which results of the two-photon cross sections were given.6,7 Two-photon absorption is of interest in spectroscopy because two-photon transitions are governed by different selection rules than one-photon ...
Get
... εd are optical constants of metal and dielectric media, respectively [33]. Next, RayleighWood’s (RW) anomaly also creates some peaks or dips in narrow spectra because there is a diffraction order (j) emerging at the grazing angle. This effect can be predicted by [(λ / Λ ) j ]2 + 2(λ / Λ ) j sin θ − ...
... εd are optical constants of metal and dielectric media, respectively [33]. Next, RayleighWood’s (RW) anomaly also creates some peaks or dips in narrow spectra because there is a diffraction order (j) emerging at the grazing angle. This effect can be predicted by [(λ / Λ ) j ]2 + 2(λ / Λ ) j sin θ − ...
Multinuclear NMR as a tool for studying local order and
... modifications by partially or fully averaging first order anisotropies (chemical shift or first order quadrupolar interaction) or second order quadrupolar anisotropies. In that case, NMR experiments are sensitive to motion at frequencies ...
... modifications by partially or fully averaging first order anisotropies (chemical shift or first order quadrupolar interaction) or second order quadrupolar anisotropies. In that case, NMR experiments are sensitive to motion at frequencies ...
syllabus for two‐year four‐semester course in chemistry 2014
... symbols. Electron pair wave function, VB theory and its application to H2 molecule. Comparison of VB and MO theories. Unit-2: Coordination Chemistry 2 Metal-centered electronic spectra of transition metal complexes: microstates, determination of ground and all excited state terms of dn ions, splitti ...
... symbols. Electron pair wave function, VB theory and its application to H2 molecule. Comparison of VB and MO theories. Unit-2: Coordination Chemistry 2 Metal-centered electronic spectra of transition metal complexes: microstates, determination of ground and all excited state terms of dn ions, splitti ...
Hyper-Raman scattering and the selection rules for the wave vector
... continuous pumping of the active element (pumppower 5 kW) and with Q-switching of the cavity by an acousto-optical shutter (switching frequency 4-60 kHz). Under conditions that are optimal from the viewpoint of the intensity of the HRS signal, the repetition frequency was -5 kHz, the pulse duration ...
... continuous pumping of the active element (pumppower 5 kW) and with Q-switching of the cavity by an acousto-optical shutter (switching frequency 4-60 kHz). Under conditions that are optimal from the viewpoint of the intensity of the HRS signal, the repetition frequency was -5 kHz, the pulse duration ...
PCCPwww
... precursors. As a result of this procedure, samples containing mixtures of copper ions in different aggregation and oxidation states are usually obtained. In order to avoid the heterogeneity of copper species present in the sample (which complicates the characterisation of the active sites), an altern ...
... precursors. As a result of this procedure, samples containing mixtures of copper ions in different aggregation and oxidation states are usually obtained. In order to avoid the heterogeneity of copper species present in the sample (which complicates the characterisation of the active sites), an altern ...
(NH3)n and NH2 - Sanov Group
... Solid theoretical foundations have been developed for understanding the resulting angular distributions for the cases of atomic and small molecular anions,8, 15–19 but it is less so for cluster anions. In general, PADs reflect the superposition of all allowed final states, as perhaps most apparent i ...
... Solid theoretical foundations have been developed for understanding the resulting angular distributions for the cases of atomic and small molecular anions,8, 15–19 but it is less so for cluster anions. In general, PADs reflect the superposition of all allowed final states, as perhaps most apparent i ...
Theory of Excitation Energy Transfer in Pigment - diss.fu
... The first step of photosynthesis is the capture of light by a grid of protein bound pigments. These pigment-protein complexes are therefore termed light-harvesting complexes or antenna complexes. In 1932 Emerson and Arnold [4] estimated from experiments investigating the oxygen production efficiency ...
... The first step of photosynthesis is the capture of light by a grid of protein bound pigments. These pigment-protein complexes are therefore termed light-harvesting complexes or antenna complexes. In 1932 Emerson and Arnold [4] estimated from experiments investigating the oxygen production efficiency ...
Optical basicity - Archives ouvertes HAL Artois
... plotting the XPS O1s binding energy against Λth, which results in a logarithmic scale, while a correcting factor may be used in the case of catalysts exhibiting a compact crystal structure. As the goal is to be able to predict the acidity/basicity that would be necessary for a selective catalyst to ...
... plotting the XPS O1s binding energy against Λth, which results in a logarithmic scale, while a correcting factor may be used in the case of catalysts exhibiting a compact crystal structure. As the goal is to be able to predict the acidity/basicity that would be necessary for a selective catalyst to ...
Dynamics of electron solvation in I (CH3OH)n
... pulsed jet then passed through a ring electrode ionizer. Secondary electrons from the ionization process formed I− via dissociative electron attachment to CH3 I, which could either be picked up by methanol clusters in the jet or act as a nucleation site for cluster formation. The anion beam was inje ...
... pulsed jet then passed through a ring electrode ionizer. Secondary electrons from the ionization process formed I− via dissociative electron attachment to CH3 I, which could either be picked up by methanol clusters in the jet or act as a nucleation site for cluster formation. The anion beam was inje ...
D--All Websites-eChemistryHelp-.mdi
... 1. The definition : Oxidation number of an element in a particular compound represents the number of electrons lost or gained by an element during its change from free state into that compound or Oxidation number of an element in a particular compound represents the extent of oxidation or reduction ...
... 1. The definition : Oxidation number of an element in a particular compound represents the number of electrons lost or gained by an element during its change from free state into that compound or Oxidation number of an element in a particular compound represents the extent of oxidation or reduction ...
Simultaneous Generation of Different Types of Ion Pairs upon
... nature. We present here an investigation of the CR dynamics of ion pairs generated upon CT excitation of the MPe/TCNE complex in several solvents using femtosecond visible transient absorption spectroscopy. MPe was chosen instead of Pe because of its superior solubility. However, its photophysical a ...
... nature. We present here an investigation of the CR dynamics of ion pairs generated upon CT excitation of the MPe/TCNE complex in several solvents using femtosecond visible transient absorption spectroscopy. MPe was chosen instead of Pe because of its superior solubility. However, its photophysical a ...
Backbone and side chain assignment strategies for
... heteronuclear correlation experiments [13]. In studies of polypeptides and proteins in liquid state it is usually sufficient to examine a succession of twospin correlations such as in NH-CA, NH-CA-CB or NH-CA-CO topologies. In a conventional HETCOR experiment [14] this is usually achieved by a decreas ...
... heteronuclear correlation experiments [13]. In studies of polypeptides and proteins in liquid state it is usually sufficient to examine a succession of twospin correlations such as in NH-CA, NH-CA-CB or NH-CA-CO topologies. In a conventional HETCOR experiment [14] this is usually achieved by a decreas ...
Mössbauer spectroscopy
Mössbauer spectroscopy is a spectroscopic technique based on the Mössbauer effect. This effect, discovered by Rudolf Mössbauer in 1957, consists in the recoil-free, resonant absorption and emission of gamma rays in solids.Like NMR spectroscopy, Mössbauer spectroscopy probes tiny changes in the energy levels of an atomic nucleus in response to its environment. Typically, three types of nuclear interactions may be observed: an isomeric shift, also known as a chemical shift; quadrupole splitting; and magnetic or hyperfine splitting, also known as the Zeeman effect. Due to the high energy and extremely narrow line widths of gamma rays, Mössbauer spectroscopy is a very sensitive technique in terms of energy (and hence frequency) resolution, capable of detecting change in just a few parts per 1011.