Sympathetic crystallization of CaH{sup +} produced by a laser-induced reaction

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.033422· OSTI ID:21541327

Kimura, Naoki; Okada, Kunihiro; Takayanagi, Toshinobu ^[1]; Wada, Michiharu ^[2]; Ohtani, Shunsuke ^[3]; Schuessler, Hans A ^[4]

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1. Department of Physics, Sophia University, 7-1 Kioicho, Chiyoda, Tokyo 102-8554 (Japan)
2. Atomic Physics Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
3. Institute for Laser Science (ILS), University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585 (Japan)
4. Department of Physics, Texas A and M University, College Station, Texas 77843 (United States)

We investigated sympathetic Coulomb crystallization of CaH{sup +} ions produced by a laser-induced reaction through an excited state according to {sup 40}Ca{sup +}(4p {sup 2}P{sub 1/2}) + H{sub 2} {yields} {sup 40}CaH{sup +} + H. {sup 40}CaH{sup +} ions stored in a linear Paul trap were characterized by their secular-motion excitation spectrum and by the modified fluorescence images of crystallized Ca{sup +} ions. The number of two-species crystallized ions, the secular motion temperature, and the structure were determined by molecular dynamics simulations. Both the observed two-species ion crystals and simulation images demonstrate that the CaH{sup +} ions were sympathetically crystallized with their secular-motion temperature being less than 10 mK. We determined reaction rates from fluorescence images of two-species Coulomb crystals by systematically changing the reaction time. In addition a lower limit for the reaction rate coefficient k=8x10{sup -10} cm{sup 3}/s was obtained.

• OSTI ID: 21541327
• Journal Information: Physical Review. A, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevA.83.033422; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCIUM HYDRIDES
CALCIUM IONS
CRYSTALLIZATION
EXCITATION
FLUORESCENCE
HYDROGEN
IONIC CRYSTALS
LASERS
MOLECULAR DYNAMICS METHOD
REACTION KINETICS
SIMULATION
SPECTRA
TRAPPING
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCULATION METHODS
CHARGED PARTICLES
CRYSTALS
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
HYDRIDES
HYDROGEN COMPOUNDS
IONS
KINETICS
LUMINESCENCE
NONMETALS
PHASE TRANSFORMATIONS
PHOTON EMISSION