Rate Coefficients for Vibrational Relaxation of OH(X2Π, v = 1–4) by He

2013 ◽  
Vol 117 (16) ◽  
pp. 3253-3259 ◽  
Author(s):  
Nanase Kohno ◽  
Jun Yamashita ◽  
Chihiro Kadochiku ◽  
Hiroshi Kohguchi ◽  
Katsuyoshi Yamasaki
Keyword(s):  
Vibrational Relaxation ◽  
Rate Coefficients

Oxygen vibrational and dissociation relaxation behind regular reflected shocks

1976 ◽  
Vol 74 (3) ◽  
pp. 477-495 ◽  
Author(s):  
H. Oertel
Keyword(s):  
Theoretical Model ◽  
Vibrational Relaxation ◽  
Relaxation Times ◽  
Dissociation Rate ◽  
Numerical Calculations ◽  
Rate Coefficients ◽  
Double Exposure ◽  
Experimental Conditions ◽  
Density Profiles ◽  
Best Fit

The oxygen vibrational and dissociation relaxation behind regular reflected shocks has been calculated and measured. Numerical calculations using published rate coefficients supplied the relaxation-zone data needed to estimate the range of most useful experimental conditions. Then photographs of the shock reflexion were taken using a complementary double-exposure interferometer. The density profiles in the relaxation zones behind the reflected shocks were measured by means of a multibeam laser-differential interferometer. The results of these experiments confirmed the theoretical model adopted for the calculations within a certain range of experimental conditions, but clearly revealed the need for revising the rate coefficients. New calculations with different vibrational relaxation times and dissociation rate coefficients then had the result that the best fit of calculated to measured profiles was obtained when the following values were inserted.Vibration\begin{eqnarray*} & p\tau_v = A_v\exp(B_vT^{-\frac{1}{3}}),\\ & A_v = (2.1\pm 0.2)\times 10^{-5}\,{\rm kg/ms},\quad B_v = 129\,{}^{\circ}{\rm K}^{\frac{1}{3}}. \end{eqnarray*}Dissociation: O2+ O_2[rlarr ] 2O + O_2\begin{eqnarray*} & {\mathop {k_1}\limits^{\rightharpoonup}} = A_1T^{-2.5}\exp (-\theta_D/T),\\ & A_1 = (6.2 \pm 0.5)\times 10^{18}\,{\rm m}^3\,{}^{\circ}{\rm K}^{2.5}/{\rm mol}\,{\rm s},\quad\theta_D = 59\,136\,{}^{\circ}{\rm K}. \end{eqnarray*}Dissociation: O2+ O[rlarr ]3O\begin{eqnarray*} & {\mathop {k_1}\limits^{\rightharpoonup}} = A_2T^{-1.0}\exp (-\theta_D/T),\\ & A_2 = (4.0 \mp 0.5)\times 10^{-13}\,{\rm m}^3\,{}^{\circ}{\rm K}/{\rm mol}\,{\rm s}. \end{eqnarray*}

scholarly journals A Theoretical Study of Rate Coefficients for the O + NO Vibrational Relaxation

2008 ◽  
Vol 112 (5) ◽  
pp. 960-965 ◽  
Author(s):  
P. J. S. B. Caridade ◽  
V. C. Mota ◽  
J. R. Mohallem ◽  
A. J. C. Varandas
Keyword(s):  
Vibrational Relaxation ◽  
Theoretical Study ◽  
Rate Coefficients

Vibrational relaxation and electronic quenching rate coefficients for BiF(A0+,v’) by SF6

1988 ◽  
Vol 89 (7) ◽  
pp. 4450-4451 ◽  
Author(s):  
H. Helvajian ◽  
J. S. Holloway ◽  
J. B. Koffend
Keyword(s):  
Vibrational Relaxation ◽  
Rate Coefficients ◽  
Quenching Rate

Energy transfer in the quenching of singlet molecular oxygen - II. The rates of formation and quenching of vibrationally excited molecules

1977 ◽  
Vol 356 (1686) ◽  
pp. 295-306 ◽  
Keyword(s):  
Energy Transfer ◽  
Molecular Oxygen ◽  
Vibrational Relaxation ◽  
Vibrational Excitation ◽  
Rate Coefficients ◽  
Singlet Molecular Oxygen ◽  
Vibrationally Excited ◽  
The Absolute ◽  
Excited Molecules ◽  
Kinetics Of

The absolute efficiencies for the vibrational excitation of molecules which quench singlet molecular oxygen have been determined from measurements of their infrared chemiluminescence and kinetics of relaxation. The systems studied were NO and CO with O 2 ( 1 ∆ g ) and NO, CO, HCl, DCl, H 2 O, D 2 O, CO 2 , N 2 O, NH 3 and C 2 H 2 with O 2 ( 1 ∑ + g ). Rate coefficients for the vibrational relaxation of a number of these molecules by molecular oxygen were also determined.

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