Low energy collisions of CN(X{sup 2}Σ{sup +}) with He in magnetic fields
- Department of Physics, Anhui normal university, Wuhu 241000 (China)
A theoretical investigation of the He–CN({sup 2}Σ{sup +}) complex is presented. We perform ab initio calculations of the interaction potential energy surface and carry out accurate calculations of bound energy levels of the complex including the molecular fine structure. We find the potential has a shallow minimum and supports seven and nine bound levels in complex with {sup 3}He and {sup 4}He, respectively. Based on the potential the quantum scattering calculation is then implemented for elastic and inelastic cross sections of the magnetically trappable low-field-seeking state of CN({sup 2}Σ{sup +}) in collision with {sup 3}He atom. The cold collision properties and the influence of the external magnetic field as well as the effect of the uncertainty of interaction potential on the collisionally induced Zeeman relaxation are explored and discussed in detail. The ratios of elastic to inelastic cross sections are large over a wide range of collision energy, magnetic field, and scaling factor of the potential, suggesting helium buffer gas loading and cooling of CN in a magnetic trap is a good prospect.
- OSTI ID:
- 22489539
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 5 Vol. 136; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
Zeeman relaxation of MnH (X{sup 7}{Sigma}{sup +}) in collisions with {sup 3}He: Mechanism and comparison with experiment
Ultracold atom-molecule collisions and bound states in magnetic fields: Tuning zero-energy Feshbach resonances in He-NH ({sup 3}{sigma}{sup -})