Ultra low-energy behavior of an ionic replacement reaction {sup 3}He{sup 4}He{sup +}+{sup 4}He{yields}{sup 4}He{sub 2}{sup +}+{sup 3}He
- Department of Chemistry, University of Rome La Sapienza, Piazzale A. Moro 5, 00185 Rome (Italy)
An accurate ab initio potential energy surface has been employed for the treatment of the full quantum dynamics for isotopic exchange reaction {sup 4}He{sup 3}He{sub 2}{sup +}+{sup 4}He. State-to-state reactive probabilities have been obtained using a time-independent approach at ultralow collision energies. More than one total angular momentum has been calculated in order to provide a converged rate constant for the title reaction within the ultralow temperature regime. The reaction is found to become faster than the Langevin value when T{yields}0, thus providing connection with experiments with sympathetically cooled molecular ions or superfluid helium nanodroplets.
- OSTI ID:
- 20786908
- Journal Information:
- Physical Review. A, Vol. 73, Issue 3; Other Information: DOI: 10.1103/PhysRevA.73.032702; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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