Influence of scattering on the vibrational partition function at extreme temperatures
Institute of Physics, University of Szczecin, Wielkopolska 15 St, Szczecin, Poland
Accepted: 11 February 2021
Published online: 22 February 2021
The vibrational partition function is calculated for three diatomic molecules of different character (CO, , NH) at extremely high temperatures and contributions of scattering interactions between atoms is analyzed. The classical method with the quantum Wigner-Kirkwood correction is used in version with only bound states and bound plus scattering states generated by rotationless potential energy curve. The partition function based on bound states of the present method is compared with the partition function based on the vibrational levels. It is also found that contribution of scattering states in the vibrational partition function is similar independently of molecule.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021