The elastic and inelastic scattering of diatomic molecules by atoms: CsI+Ar, CsCl+Ar, CsI+Xe

Journal Article · Wed Oct 15 04:00:00 EDT 1975 · J. Chem. Phys., v. 63, no. 8, pp. 3349-3364

DOI:https://doi.org/10.1063/1.431825· OSTI ID:4198554

Armstrong, W D; Conley, R J; Creaser, R P; Greene, E F; Hall, R B

Measurements of differential cross sections for the elastic and inelastic scattering of CsI by Ar, of CsI by Xe, and of CsCl by Ar are reported at three relative translational energies E in the range 4--17 kJ mol$sup -1$. Both excitation and de-excitation of the molecules, which have internal energies approximately those of a gas at 844 K, occur with cross sections approaching those of elastic scattering for center-of-mass angles of 40degree or greater. No rainbow structure is apparent; presumably either E is below the threshold for the transition from orbiting to rainbow scattering, or E is so high that any rainbow structure is obscured by the scattering near the primary beam, or more probably the molecular asymmetry and dipole moment cause complicated trajectories. The absence of structure corresponding to purely vibrational transitions, even when this would be resolved by the apparatus, suggests that a substantial fraction of the inelastic events involve changes in rotational energy.

• Research Organization: Metcalf Chemical Laboratories, Brown University, Providence, Rhode Island 02912
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-004008
• OSTI ID: 4198554
• Journal Information: J. Chem. Phys., v. 63, no. 8, pp. 3349-3364, Journal Name: J. Chem. Phys., v. 63, no. 8, pp. 3349-3364; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

*ARGON-- ATOM-MOLECULE COLLISIONS
*CESIUM CHLORIDES-- ATOM-MOLECULE COLLISIONS
*CESIUM IODIDES-- ATOM-MOLECULE COLLISIONS
*XENON-- ATOM-MOLECULE COLLISIONS
640304* --Physics Research--Atomic
Molecular & Chemical Physics--Collision Phenomena
DE-EXCITATION
DIFFERENTIAL CROSS SECTIONS
EXCITATION
N60400* --Physics (Atomic & Molecular)--Collision Phenomena