Cold atom-atom-ion three-body recombination of 4 He- 4 He-X - (X = H or D).

Autor: Wang BB; Department of Physics, Dalian University of Technology, Dalian 116024, China. ychan@dlut.edu.cn., Han YC; Department of Physics, Dalian University of Technology, Dalian 116024, China. ychan@dlut.edu.cn., Gao W; Department of Physics, Dalian University of Technology, Dalian 116024, China. ychan@dlut.edu.cn., Cong SL; Department of Physics, Dalian University of Technology, Dalian 116024, China. ychan@dlut.edu.cn.
Jazyk: angličtina
Zdroj: Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2017 Aug 30; Vol. 19 (34), pp. 22926-22933.
DOI: 10.1039/c7cp04310d
Abstrakt: The atom-atom-ion three-body recombination (TBR) of mixed 4 He and X - (X = H or D) systems is investigated by solving the Schrödinger equation using the adiabatic hyperspherical representation method. It is shown that the dominant products after a TBR in the ultracold limit (E ≤ 0.1 mK × k B ) are different for the two systems. For the 4 He 4 HeH - system, the rate of TBR into the 4 HeH - ion is nearly two orders of magnitude larger than that of TBR into the neutral 4 He 2 molecule. In contrast, the yield of 4 He 2 is a little higher than that of 4 HeD - for the 4 He 4 HeD - system. Furthermore, since the adiabatic potentials become more attractive and the nonadiabatic couplings become much stronger by substituting D for H in the 4 He 4 HeH - system, the total TBR rate for the 4 He 4 HeD - system is nearly two orders of magnitude larger than that for the 4 He 4 HeH - system.
Databáze: MEDLINE
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