Non-Boltzmann vibrational distributions in homonuclear diatomic molecules and ions

Details Non-Boltzmann vibrational distributions in homonuclear diatomic molecules and ions Non-Boltzmann vibrational distributions in homonuclear diatomic molecules and ions

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.288..286g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 288, Issue 2, pp. 286-294.

Astronomy and Astrophysics

Astronomy

4

Line: Formation, Molecular Processes, Ism: Molecules, Infrared: Ism: Lines And Bands

Scientific paper

We investigate the fates and population densities of the vibrationally excited homonuclear diatomic molecules H_2/H^+_2, C_2/C^+_2 and O_2/O^+_2 in interstellar conditions using photochemical kinetic models. We find that the population distribution of vibrationally excited H^+_2 resembles the nascent distribution from the cosmic ray ionization of H_2 under several cloud conditions. We predict that the density of H^+_2(v) could exceed that of H_2(v) under certain cloud conditions. Based on this we present a synthetic spectrum of the quadrupole-allowed infrared emission from H^+_2(v). Our results for H_2(v) are in accord with those of previous workers. The vibrationally excited states of C_2 and O_2 show abundances on the order of 10^-4 of the ground state. We emphasize that these populations are controlled by reaction dynamics and photochemical kinetics, and do not resemble those of the local thermodynamic equilibrium (LTE). Preliminary models of the C^+_2(v) and O^+_2(v) chemistry show that the vibrational distributions will somewhat resemble the nascent distributions of the reactions which create them. Further experimental or theoretical studies of the dynamics of these reactions are necessary before quantitative predictions can be made.

Affiliated with

Also associated with

No associations

Rating

Non-Boltzmann vibrational distributions in homonuclear diatomic molecules and ions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Non-Boltzmann vibrational distributions in homonuclear diatomic molecules and ions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-Boltzmann vibrational distributions in homonuclear diatomic molecules and ions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1477069