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Volumn 78, Issue 4, 2008, Pages

Chemical reactions between cold trapped Ba+ ions and neutral molecules in the gas phase

Author keywords

[No Author keywords available]

Indexed keywords

BARIUM; CHEMICAL REACTIONS; DYNAMICS; ELECTROLYSIS; GRAFTING (CHEMICAL); LASER COOLING; LASERS; MOLECULAR DYNAMICS; MOLECULES; QUANTUM CHEMISTRY; RATE CONSTANTS; REACTION KINETICS; REACTION RATES; SYNTHESIS (CHEMICAL);

EID: 55049119936     PISSN: 10502947     EISSN: 10941622     Source Type: Journal    
DOI: 10.1103/PhysRevA.78.042709     Document Type: Article
Times cited : (22)

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    • The most important overall feature of crystallized mixed-species ion ensembles is a radial separation of the species due to their different effective trap potential (pseudopotential) strength. The effective trap potential Utrap for a particular ion species with charge Q and mass m scales as Q2 /m. In addition, for two ion species with charges Q1 and Q2, the interspecies intercation is ∼ Q1 Q2. Thus, for equal charge of all ions, the total potential energy will usually be minimized if the lighter ions are closer to the axis. A radial gap between the species develops. For arbitrary charge ratio, in the limit of cylindrical symmetry (very prolate ensembles), the ratio of outer radius r1 of the lower mass-to-charge ratio (say m1 / Q1) ensemble and inner radius r2 of the higher mass-to-charge ratio (say m2 / Q2) ensemble is given by r1 / r2 = (Q2 m1 / Q1 m2) 1/2 [D. J. Wineland, in Proceedings of the Cooling, Condensation, and Storage of Hydrogen Cluster Ions Workshop, Menlo Park, 1987, edited by, J. T. Bahns, (Dayton University, Menlo Park, CA, 1987), p. 181].
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