A quantum-mechanical investigation of O( 3 P ) + CO scattering cross sections at superthermal collision energies

Sanchit Chhabra, Marko Gacesa, Malathe S. Khalil, Amal Al Ghaferi, Nayla El-Kork

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The kinetics and energetic relaxation associated with collisions between fast and thermal atoms are of fundamental interest for escape and therefore also for the evolution of the Mars atmosphere. The total and differential cross sections of fast O( 3 P ) atom collisions with CO have been calculated from quantum mechanical calculations. The cross sections are computed at collision energies from 0.4 to 5 eV in the centre-of-mass frame rele v ant to the planetary science and astrophysics. All the three potential energy surfaces ( 3 A ' , 3 A, and 2 3 A symmetry) of O( 3 P ) + CO collisions separating to the atomic ground state have been included in calculations of cross sections. The cross sections are computed for all three isotopes of energetic O( 3 P ) atoms collisions with CO. The isotope dependence of the cross sections are compared. Our newly calculated data on the energy relaxation of O atoms and their isotopes with CO molecules will be very useful to impro v e the modelling of escape and energy transfer processes in the Mars' upper atmosphere.

Original languageBritish English
Pages (from-to)1253-1260
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume519
Issue number1
DOIs
StatePublished - 1 Feb 2023

Keywords

  • astrochemistry
  • molecular data
  • scattering

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