Translational and rotational excitation of the CO2(0000) vibrationless state in the collisional quenching of highly vibrationally excited perfluorobenzene: Evidence for impulsive collisions accompanied by large energy transfers

1997 ◽  
Vol 106 (17) ◽  
pp. 7055-7071 ◽  
Author(s):  
Chris A. Michaels ◽  
Zhen Lin ◽  
Amy S. Mullin ◽  
H. Charles Tapalian ◽  
George W. Flynn
Keyword(s):  
Large Energy ◽  
Rotational Excitation ◽  
Collisional Quenching ◽  
Vibrationally Excited ◽  
Energy Transfers

scholarly journals Alpha-Transfer Reactions with Large Energy Transfers

1979 ◽  
Vol 42 (23) ◽  
pp. 1518-1520 ◽  
Author(s):  
H. Fröhlich ◽  
T. Shimoda ◽  
M. Ishihara ◽  
K. Nagatani ◽  
T. Udagawa ◽  
...  
Keyword(s):  
Transfer Reactions ◽  
Large Energy ◽  
Energy Transfers

Vibrational energy transfer. Collisional quenching of competitive unimolecular reactions

1968 ◽  
Vol 46 (2) ◽  
pp. 341-343 ◽  
Author(s):  
D. C. Tardy ◽  
C. W. Larson ◽  
B. S. Rabinovitch
Keyword(s):  
Vibrational Energy ◽  
Heat Bath ◽  
Polyatomic Molecules ◽  
Unimolecular Reaction ◽  
Collisional Quenching ◽  
Kcal Mole ◽  
Vibrationally Excited ◽  
Reaction Systems ◽  
A Value ◽  
Collisional Deexcitation

A technique is described for the study of collisional deexcitation of highly vibrationally excited polyatomic molecules by use of externally activated competitive unimolecular reaction systems. This method has some advantages and is illustrated by the decomposition of chemically activated hexyl-3 radicals in the presence of H2 and CF4 as heat bath molecules. The former removes ~1.2 kcal mole−1 per successful collision; while for the latter a value in excess of 4.6 kcal is found so that CF4 behaves operationally like a strong collider.

Energy transfers by long-lived species in glows and afterglows

2002 ◽  
Vol 74 (3) ◽  
pp. 317-326 ◽  
Author(s):  
Santolo De Benedictis ◽  
Giorgio Dilecce
Keyword(s):  
Current Literature ◽  
Ground State ◽  
Vibrationally Excited ◽  
Energy Transfers

An overview of the current literature on diagnostics and modeling of energy transfers by long-lived species in N2­CO, He­NO, He­N2­O2, N2­O2, and N2­H2O plasma is given. Energy transfers by vibrationally excited ground-state long-lived species and by electronic molecular and atomic metastables will be highlighted.

The thermal and photochemical decomposition of maleic anhydride in the gas phase

1981 ◽  
Vol 59 (9) ◽  
pp. 1342-1346 ◽  
Author(s):  
R. A. Back ◽  
J. M. Parsons
Keyword(s):  
Maleic Anhydride ◽  
Gas Phase ◽  
Light Emission ◽  
Order Rate Constant ◽  
Static System ◽  
Collisional Quenching ◽  
Vibrationally Excited ◽  
Concerted Mechanism ◽  
Photochemical Decomposition ◽  
Weak Light

The thermal decomposition of maleic anhydride has been studied in the gas phase in a static system at temperatures from 645 to 760 K and pressures from 0.7 to 20 Torr. The first-order rate constant for the homogeneous unimolecular reaction,[Formula: see text]is described by the Arrhenius parameters log A (s−1) = 14.33 (±0.3), and E = 60.9 (± 1) kcal/mol. The reaction appears to proceed through a concerted mechanism rather than a biradical one.The photochemical decomposition, studied at wavelengths from 220 to 350 nm, yielded the same products. At 300 nm and below, the decomposition was unaffected by pressure, but at longer wavelengths collisional quenching was observed. Weak light emission was observed on excitation between 350 and 380 nm. The absorption spectrum was measured from 250 to 400 nm, and three overlapping transitions, π*←π, π*←n+, and π*←n−, can be distinguished. The mechanism of the photolysis is discussed and it is concluded that it probably proceeds through internal conversion to a vibrationally excited ground state.

scholarly journals Longitudinal Neutron Resonance Spin Echo Spectroscopy under Large Energy Transfers

2019 ◽  
Vol 1316 ◽  
pp. 012005
Author(s):  
C. Franz ◽  
O. Soltwedel ◽  
S. Säubert ◽  
A. Wendl ◽  
W. Gottwald ◽  
...  
Keyword(s):  
Spin Echo ◽  
Large Energy ◽  
Neutron Resonance ◽  
Energy Transfers ◽  
Resonance Spin
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