Full close-coupled calculations are carried out of the cross sections for energy transfer between rotational levels of carbon monoxide in collision with He-4 atoms with energies between 5 and 600 cm(-1). At low energies, the cross sections are dominated by contributions from shape resonances. The calculated cross sections are in satisfactory agreement with the experimental data measured at an energy of 570 cm(-1). Calculations using the infinite order sudden approximation are carried out of cross sections for energy transfer between vibrational levels of CO. Vibrational energy transfer is dominated by transitions in which the vibrational quantum number changes by unity.
Rotational and vibrational excitation of CO molecules by collisions with He-4 atoms / CECCHI PESTELLINI, C; Bodo, Enrico; Balakrishnan, N; Dalgarno, A.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - STAMPA. - 571:(2002), pp. 1015-1020. [10.1086/340020]
Rotational and vibrational excitation of CO molecules by collisions with He-4 atoms
BODO, Enrico;
2002
Abstract
Full close-coupled calculations are carried out of the cross sections for energy transfer between rotational levels of carbon monoxide in collision with He-4 atoms with energies between 5 and 600 cm(-1). At low energies, the cross sections are dominated by contributions from shape resonances. The calculated cross sections are in satisfactory agreement with the experimental data measured at an energy of 570 cm(-1). Calculations using the infinite order sudden approximation are carried out of cross sections for energy transfer between vibrational levels of CO. Vibrational energy transfer is dominated by transitions in which the vibrational quantum number changes by unity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.