Communication: Vibrational relaxation of CO(1Σ) in collision with Ar(1S) at temperatures relevant to the hypersonic flight regime.

Computational study of collisions between O(3P) and NO(2Π) at temperatures relevant to the hypersonic flight regime.

Reactions involving N and O atoms dominate the energetics of the reactive air flow around spacecraft when reentering the atmosphere in the hypersonic flight regime. For this reason, the thermal rate coefficients for reactive processes involving O((3)P) and NO((2)Π) are relevant over a wide range of temperatures. For this purpose, a potential energy surface (PES) for the ground state of the NO2 ...

Computational Study of Collisions between O(p) and No(π) at Temperatures Relevant to the Hypersonic Flight Regime (postprint)

NO and OH Spectroscopic Vibrational Temperature Measurements in a Post-Shock Relaxation Region

A HYPERSONIC conditions encountered during atmospheric planetary entry, molecular real gas processes become significant. Thermal transitions and chemical reactions are known to affect flight aerodynamics, for example increased energy absorption by chemical reactions leads to a decreased shock standoff distance for a given test configuration [1]. Behind a strong shock, high temperatures and larg...

The vibrational relaxation of NO in Ar: tunneling in a curve-crossing mechanism.

Experimental data for the vibrational relaxation NO(X(2)Π, v = 1) + Ar → NO(X(2)Π, v = 0) + Ar between 300 and 2000 K are analyzed. The measured rate coefficients k10 greatly exceed Landau-Teller values (LT)k10. This observation can be attributed to a mechanism involving curve-crossing of the (A'', v = 1) and (A', v = 0) vibronic states of the collision system. At high temperatures, the rate co...

. at om - p h ] 2 7 M ay 1 99 9 Theoretical study of the absorption spectra of the lithium dimer

For the lithium dimer we calculate cross sections for absorption of radiation from the vibrational-rotational levels of the ground X 1Σ+g electronic state to the vibrational levels and continua of the excited A 1Σ+u and B Πu electronic states. Theoretical and experimental data are used to characterize the molecular properties taking advantage of knowledge recently obtained from photoassociation...