A BOXCARS investigation of the interspecies V–V energy transfer from highly excited SF6 to N2

1995 ◽  
Vol 73 (7-8) ◽  
pp. 505-511
Author(s):  
W. E. Jones ◽  
Lixin Wang
Keyword(s):  
Experimental Data ◽  
Energy Transfer ◽  
Partial Pressure ◽  
Laser Excitation ◽  
Population Distribution ◽  
Maximum Energy ◽  
Energy Increase ◽  
Transfer Processes ◽  
Partial Pressures ◽  
Vibrational Levels

The BOXCARS technique was used to investigate the V–V energy transfer between highly excited SF6 and N2. It was found that a Boltzmann population distribution among vibrational levels of N2 is present by 1 μs after laser excitation of SF6 and is maintained during the energy-transfer processes. The maximum energy transferred to N2 increases linearly with the increase of the average number of photons absorbed [Formula: see text] by SF6 in the range [Formula: see text]. The maximum energy transferred to the N2 vibrational levels increases with the partial pressure of SF6 and decreases with the partial pressure of N2. The apparent rate of energy increase in the N2 vibrational levels increases with both partial pressures of SF6 and N2. However, both the rate and the amount of energy transferred to N2 vibrational levels depend more strongly on the partial pressure of SF6 than on the partial pressure of N2. A model calculation produces a reasonable fit to the experimental data.

A BOXCARS investigation of the V–V energy transfer from highly excited SF6 to CS2 and the sensitized photodissociation of CS2

1994 ◽  
Vol 72 (11-12) ◽  
pp. 845-850 ◽  
Author(s):  
L. Wang ◽  
W. E. Jones
Keyword(s):  
Energy Transfer ◽  
Partial Pressure ◽  
Energy Exchange ◽  
Laser Excitation ◽  
Vibrational Energy ◽  
Vibrational Temperature ◽  
Excitation Intensity ◽  
Excitation Energies ◽  
Ir Laser ◽  
Partial Pressures

The BOXCARS technique was used to investigate the vibrational energy transfer between highly excited SF6 and CS2, and for the sensitized photodissociation of CS2. The analysis of data, as reported in our previous studies, to extract vibrational temperature from the CARS signal has been revised in the present work to adjust for the fact that the ground-state population may not be constant. The current investigation suggests that IR laser excitation of SF6 and the energy exchange between excited SF6 and CS2 create a high-lying vibrational energy reservoir in the CS2 vibrational manifold. The rate of energy transfer depends on the partial pressures of SF6 and CS2, and the excitation intensity. The transfer rate shows greater dependence on the partial pressure of SF6 than on the partial pressure of CS2. At higher excitation energies, the energy reservoir leads to photofragmentation products.

Energy transfer processes of working gas in pulse tube

2000 ◽  
Author(s):  
Vincenzo Naso ◽  
Marco Lucentini ◽  
Wei Dong
Keyword(s):  
Energy Transfer ◽  
Pulse Tube ◽  
Transfer Processes

Photoluminescence studies on energy transfer processes in cerium-doped Gd3Al2Ga3O12 crystals

2015 ◽  
Vol 41 ◽  
pp. 45-48 ◽  
Author(s):  
M. Kitaura ◽  
A. Sato ◽  
K. Kamada ◽  
S. Kurosawa ◽  
A. Ohnishi ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Transfer Processes ◽  
Photoluminescence Studies

Effect of CO2 on Anti-Corrosion Property of a Polyurea Coating Modified with Organosilicone

2014 ◽  
Vol 789 ◽  
pp. 466-470
Author(s):  
Qing Hao Shi ◽  
Bing Ying Wang ◽  
Bin Zhao
Keyword(s):  
High Temperature ◽  
Partial Pressure ◽  
Composite Coating ◽  
Corrosion Test ◽  
Electrochemical Impedance ◽  
Failure Process ◽  
Corrosion Property ◽  
Corrosion Mechanism ◽  
Partial Pressures ◽  
High Temperature High Pressure

The corrosion mechanism of organic silicon modified polyurea composite coating under different CO2 partial pressures was studied using high-temperature autoclave, combined with scanning electron microscopy (SEM), adhesion tests and electrochemical impedance spectroscopy (EIS) technology. The experimental results showed that: there was no corrosion product formed on the surface of coating sample after high-temperature high-pressure corrosion test, and with the increasing of CO2 partial pressure, the coating adhesion and impedance values decline increases. Moreover CO2 partial pressure increases accelerated the failure process of polyurea composite coating system.

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