Atom-atom-anion three-body recombination (TBR) in mixed ⁴He and ^xLi^- (x = 6 or 7) is investigated in the adiabatic hyperspherical representation by quantum mechanically solving the Schrödinger equation. The distributions of product states following these TBR processes are found to be relatively different for the two systems when the collision energy is less than roughly 0.6 mK × k_B or 0.3 mK × k_B for ⁴He⁴He⁶Li^- and ⁴He⁴He⁷Li^- systems, respectively, with k_B being the Boltzmann constant. For ⁴He⁴He⁶Li^- systems, the rate of recombination into (v=0) l = 0⁴He⁶Li^- molecular anions is the largest with v and l denoting the rovibrational quantum numbers, while the TBR rate that leads to the formation of l = 1⁴He⁶Li^- molecular anions is a little smaller than that of neutral ⁴He₂ molecules. For ⁴He⁴He⁷Li^- systems, neutral ⁴He₂ molecules tend to be the most products, following the yields of l = 0 and 1 ⁴He⁷Li^- molecular anions. However, in spite of these distinctly different distributions, the products of molecular anions, the sum of l = 0 and 1 ⁴He^xLi^- products, are relatively larger than that of neutral ⁴He₂ molecules for both the two systems.

Su‐Hua Jing

Publications