Quenching of para-H{sub 2} with an ultracold antihydrogen atom H{sub 1s}
- High Performance Computing Group, BCRL, St. Cloud State University, St. Cloud, Minnesota 56301-4498 (United States)
- Institute of Theoretical Physics, UNESP--Universidade Estadual Paulista, 01140-070 Sao Paulo, SP (Brazil)
In this work we report the results of calculation for quantum-mechanical rotational transitions in molecular hydrogen, H{sub 2}, induced by an ultracold ground-state antihydrogen atom H{sub 1s}. The calculations are accomplished using a nonreactive close-coupling quantum-mechanical approach. The H{sub 2} molecule is treated as a rigid rotor. The total elastic-scattering cross section {sigma}{sub el}({epsilon}) at energy {epsilon}, state-resolved rotational transition cross sections {sigma}{sub jj}{sup '}({epsilon}) between states j and j{sup '}, and corresponding thermal rate coefficients k{sub jj}{sup '}(T) are computed in the temperature range 0.004 K < or approx. T < or approx. 4 K. Satisfactory agreement with other calculations (variational) has been obtained for {sigma}{sub el}({epsilon}).
- OSTI ID:
- 21408231
- Journal Information:
- Physical Review. A, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevA.81.022705; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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