Publication Abstracts

Green et al. 1977

Green, S., L. Monchick, R. Goldflam, and D.J. Kouri, 1977: Computational tests of angular momentum decoupling approximations for pressure broadening cross sections. J. Chem. Phys., 66, 1409-1412, doi:10.1063/1.434126.

The utility of several approximate scattering methods for predicting collision induced spectral pressure broadening has been tested by comparison with accurate close coupling results. In particular, broadening of the pure rotational spectra of HD, HCl, CO, and HCN — all perturbed by low energy collisions with He atoms — has been computed using the effective potential formalism of Rabitz, the decoupled l-dominant approximation of DePristo and Alexander, and the jz-conserving coupled states method of McGuire and Kouri. For this last method, pressure broadening cross sections have been obtained with the new, correct expression recently derived by Goldflam and Kouri as well as with an earlier formalism based on an incorrect labeling of the scattering matrices. These methods were found to be generally disappointing for predicting pressure broadening with the exception of the new, correctly formulated jz-conserving coupled states method which was found to agree quantitatively (better than 5%) with close coupling values for all cases studied.

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BibTeX Citation

@article{gr00700d,
  author={Green, S. and Monchick, L. and Goldflam, R. and Kouri, D. J.},
  title={Computational tests of angular momentum decoupling approximations for pressure broadening cross sections},
  year={1977},
  journal={Journal of Chemical Physics},
  volume={66},
  pages={1409--1412},
  doi={10.1063/1.434126},
}

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RIS Citation

TY  - JOUR
ID  - gr00700d
AU  - Green, S.
AU  - Monchick, L.
AU  - Goldflam, R.
AU  - Kouri, D. J.
PY  - 1977
TI  - Computational tests of angular momentum decoupling approximations for pressure broadening cross sections
JA  - J. Chem. Phys.
JO  - Journal of Chemical Physics
VL  - 66
SP  - 1409
EP  - 1412
DO  - 10.1063/1.434126
ER  -

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