INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
The Role of Orbiting Resonances in the Vibrational Relaxation of I2(B,v'=21) by Collisions with He at Very Low Energies: A Theoretical and Experimental Study
Autor/es:
A. GARCÍA VELA; I. CABANILLAS VIDOSA; J. C. FERRERO; G. A. PINO
Lugar:
Oxford
Reunión:
Conferencia; MOLEC; 2012
Resumen:
The
low-energy collisions of I2(B,v'=21)
with He involving collision-induced vibrational relaxation of I2 are investigated both experimentally and by
means of wave packet simulations [1]. The theoretical cross sections exhibit a
structure of peaks originated by orbiting resonances of the I2(B,v'=21)-He van der Waals complex
formed in the I2 + He collisions. Such a structure has similar
characteristics as the structure of peaks found in the experimental cross
sections [2]. In fact, four out of the five peaks of the measured cross
sections appear at positions nearly coincident with those of four of the peaks
found in the theoretical cross sections. Thus this result confirms the
experimental finding [2,3] that enhancement of I2 vibrational relaxation is caused by population
of I2(B,v'=21)-He
orbiting resonances populated upon the low-energy collisions. The possibility
of using this mechanism in the vibrational cooling of diatomic molecules is discussed.