Visualizing rotational wave functions of electronically excited nitric oxide molecules by using an ion imaging technique

2018 ◽  
Vol 20 (5) ◽  
pp. 3303-3309 ◽  
Author(s):  
Kenta Mizuse ◽  
Nao Chizuwa ◽  
Dai Ikeda ◽  
Takashi Imajo ◽  
Yasuhiro Ohshima
Keyword(s):  
Nitric Oxide ◽  
Imaging Technique ◽  
Wave Functions ◽  
Ion Imaging ◽  
Rotational Wave ◽  
Electronically Excited ◽  
Slice Imaging

Rotational eigenstates in electronically excited NO molecules have been visualized by a photoion spatial-slice imaging technique.

Photodissociation processes of a water–oxygen complex cation studied by an ion imaging technique

2020 ◽  
Vol 22 (29) ◽  
pp. 16926-16933
Author(s):  
Yuji Nakashima ◽  
Yuri Ito ◽  
Kenichi Okutsu ◽  
Motoyoshi Nakano ◽  
Fuminori Misaizu
Keyword(s):  
Imaging Technique ◽  
Theoretical Calculations ◽  
Complex Cation ◽  
Ion Imaging ◽  
Oxygen Complex ◽  
Water Oxygen

Photodissociation dynamics of O2+–H2O in the visible and ultraviolet regions was studied by ion imaging experiments and theoretical calculations.

THE Hg 6(3P1)-PHOTOSENSITIZED DECOMPOSITION OF NITRIC OXIDE

1961 ◽  
Vol 39 (12) ◽  
pp. 2549-2555 ◽  
Author(s):  
Otto P. Strausz ◽  
Harry E. Gunning
Keyword(s):  
Nitric Oxide ◽  
Quantum Yield ◽  
Ground State ◽  
Pressure Range ◽  
Oxides Of Nitrogen ◽  
Total Rate ◽  
A Value ◽  
Electronically Excited ◽  
Static Conditions ◽  
Observed Behavior

The reaction of NO with Hg 6(3P1) atoms has been studied under static conditions at 30°, over the pressure range 1–286 mm. The products were found to be N2, N2O, and higher oxides of nitrogen. At NO pressures exceeding 4 mm, the total rate of formation of N2+N2O was constant, while the ratio N2O/N2 increased linearly with the substrate pressure. The rate was found to vary directly with the first power of the intensity at 2537 Å, and a value of 1.9 × 10−3 moles/einstein was established for the quantum yield of N2 + N2O production. In the proposed mechanism, reaction is attributed to the decomposition of an energy-rich dimer, (NO)2*, which is formed by the collision of electronically excited (4II) NO molecules with those in the ground state. The (NO)2* species is assumed to decompose by the steps: (NO)2* → N2 + O2 and (NO)2* + NO → N2O + NO2. The mechanism satisfactorily explains the observed behavior of the system.

Ab initio Calculations of the Rotation-Vibration Spectrum of Na3+

1993 ◽  
Vol 58 (1) ◽  
pp. 24-28 ◽  
Author(s):  
Ladislav Češpiva ◽  
Vlasta Bonačič-Koutecký ◽  
Jaroslav Koutecký ◽  
Per Jensen ◽  
Vojtěch Hrouda ◽  
...  
Keyword(s):  
Potential Surface ◽  
Vibration Spectrum ◽  
Wave Functions ◽  
Basis Set ◽  
Morse Oscillator ◽  
Fundamental Frequencies ◽  
Rotational Wave ◽  
Rigid Molecule ◽  
Full Ci ◽  
Ci Calculations

SCF, 6C-SCF, MP4 and valence-electron full CI calculations were performed in order to determine the potential surface of Na3+. A power series in the variables yi = 1 - exp (-a∆ri), where ∆ri are bond length displacements from equilibrium, has been fitted through the surface obtained and used in a variational rotation-vibration calculations with a basis set of products of Morse-oscillator eigenfunctions and symmetric top rotational wave functions. In contrast to H3+, Na3+ behaves as a very rigid molecule and does not exhibit any anomalous anharmonicity. With our best potential surface, MP4, the predicted E' and A1' fundamental frequencies are 105.1 and 146.7 cm-1, and the harmonic E' and A1' frequencies are 106.5 and 148.3 cm-1.

An Overview of Aeronomic Processes in the Stratosphere and Mesosphere

1974 ◽  
Vol 52 (8) ◽  
pp. 1381-1396 ◽  
Author(s):  
M. Nicolet
Keyword(s):  
Nitric Oxide ◽  
Water Vapor ◽  
Nitric Acid ◽  
Oxygen Atom ◽  
Eddy Diffusion ◽  
Atmospheric Conditions ◽  
Hydrogen Atoms ◽  
Electronically Excited ◽  
The Vertical Distribution ◽  
Excited Oxygen

The discrepancy noted between theoretical and observational concentrations of O3 in the mesosphere and stratosphere can be explained by an effect of hydrogen compounds and of nitrogen oxides. Solar radiation dissociates water vapor and methane in the thermosphere and upper mesosphere. In the stratosphere the reaction of the excited oxygen atom O(1D) with methane and nitrous oxide leads to a destruction of these two molecules in the stratosphere which corresponds to a production of carbon monoxide with water vapor and of nitric oxide, respectively. Hydrogen and water vapor molecules also react with the electronically excited oxygen atom O(1D) leading to hydroxyl radicals. Insitu sources of H2 exist in the stratosphere and mesosphere: reaction of OH with CH1, photodissociation of formaldehyde, and also reaction between hydroperoxyl radicals and hydrogen atoms. The vertical distribution of water vapor is not affected by its dissociation in the stratosphere and mesosphere since its reformation is rapid.The ratio of the hydroxyl and hydroperoxyl radical concentrations cannot be determined with adequate precision and complicates the calculation of the destruction of ozone which occurs through reactions of OH and HO2 not only with atomic oxygen at the stratopause but also directly in the middle stratosphere and with CO and NO in the lower stratosphere.In addition to the various reactions involving nitric oxide and nitrogen dioxide, the reactions leading to the production and destruction of nitric acid and nitrous acid must be considered. Nitric acid molecules are involved in an eddy diffusion transport from the lower stratosphere into the troposphere and are, therefore, responsible for the removal of nitric oxide which is produced in the stratosphere. Atmospheric conditions must be known at the tropopause.

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