Rivlin, T;
McKemmish, LK;
Spinlove, KE;
Tennyson, J;
(2019)
Low temperature scattering with the R-matrix method: argon-argon scattering.
Molecular Physics
, 117
(21)
pp. 3158-3170.
10.1080/00268976.2019.1615143.
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Abstract
Results for elastic atom-atom scattering are obtained as a first practical application of RmatReact, a new code for generating high-accuracy scattering observables from potential energy curves. RmatReact has been created in response to new experimental methods which have paved the way for the routine production of ultracold (μK) atoms and molecules, and hence the experimental study of chemical reactions involving only a small number of partial waves. Elastic scattering between argon atoms is studied here. There is an unresolved discrepancy between different Ar2 potential energy curves which give different numbers of vibrational bound states and different scattering lengths for the Ar2 dimer. Depending on the number of bound states, the scattering length is either large and positive or large and negative. Scattering observables, specifically the scattering length, effective range, and partial and total cross-sections, are computed at low collision energies and compared to previous results. In general, good agreement is obtained, although our full scattering treatment yields resonances which are slightly lower in energy and narrower than previous determinations using the same potential energy curve.
| Type: | Article |
|---|---|
| Title: | Low temperature scattering with the R-matrix method: argon-argon scattering |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1080/00268976.2019.1615143 |
| Publisher version: | https://doi.org/10.1080/00268976.2019.1615143 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10076499 |
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