Ion-Atom and Ion-Molecule Hybrid Systems: Ion-Neutral Chemistry at Ultralow Energies

Eberle, Pascal; Dörfler, Alexander; Planta, Claudio von; Ravi, K.; Haas, Dominik; Zhang, Dong; Meerakker, Sebastiaan Y. T. van de; Willitsch, Stefan

doi:10.1088/1742-6596/635/1/012012

Cited by 11 publications

(12 citation statements)

References 37 publications

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“…Emerging techniques in ultracold physics are now being adapted to the study of chemical systems, bringing new capabilities to probe reaction dynamics and mechanisms (11)(12)(13). Recently, a study of the reaction of conformers of 3-aminophenol with lasercooled Ca + ions revealed a fascinating dependence on conformational state (14); quantum state resolved collisions between OH and NO (15), as well between N2 + and Rb (16), have been observed; and quantum effects were found to have a major impact on state-resolved KRb reactions (17).…”

Section: Main Textmentioning

confidence: 99%

Synthesis of mixed hypermetallic oxide BaOCa ⁺ from laser-cooled reagents in an atom-ion hybrid trap

Puri

Mills

Schneider

et al. 2017

Science

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Hypermetallic alkaline earth (M) oxides of formula MOM have been studied under plasma conditions that preclude insight into their formation mechanism. We present here the application of emerging techniques in ultracold physics to the synthesis of a mixed hypermetallic oxide, BaOCa These methods, augmented by high-level electronic structure calculations, permit detailed investigation of the bonding and structure as well as the mechanism of its formation via the barrierless reaction of Ca (P) with BaOCH Further investigations of the reaction kinetics as a function of collision energy over the range 0.005 kelvin (K) to 30 K and of individual Ca fine-structure levels compare favorably with calculations based on long-range capture theory.

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Section: Main Textmentioning

confidence: 99%

Synthesis of mixed hypermetallic oxide BaOCa ⁺ from laser-cooled reagents in an atom-ion hybrid trap

Puri

Mills

Schneider

et al. 2017

Science

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“…Owing to the narrow initial energy spread of the cold atoms and their controlled acceleration using pulsed, near-resonant laser beams, traveling clouds of atoms with well-defined and narrowly distributed kinetic energies are generated paving the way for collision experiments with a high energy resolution. Some preliminary results of our experiment were already presented in a previous conference proceedings article [31]. Here, we present a detailed characterisation of the performance of our dynamic hybrid trap and demonstrate first applications to reaction studies.…”

Section: Introductionmentioning

confidence: 60%

“…3 of our preliminary report Ref. [31]). The kinetic-energy spread is simulated to range between 24 mK and 35 mK from the lowest to the highest collision energies in Fig.…”

Section: Measurement Of Time-of-flight Spectramentioning

confidence: 73%

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A Dynamic Ion–Atom Hybrid Trap for High‐Resolution Cold‐Collision Studies

et al. 2016

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We present a dynamic ion-atom hybrid trap for studies of cold ion-neutral collisions and reactions with a significantly improved energy resolution compared to previous experiments. Our approach is based on pushing a cloud of laser-cooled Rb atoms through a stationary Coulomb crystal of cold ions using precisely controlled, tunable radiation-pressure forces. We demonstrate the tuning of the atom kinetic energies over an interval ranging from 30 mK up to 350 mK with energy spreads as low as 24 mK inferred from the comparison of experimental time-of-flight measurements with Monte Carlo trajectory simulations. We also demonstrate first applications of our method to the investigation of chemical reactions. Our development opens up perspectives for accurate studies of the energy dependence of the reaction rates, the dynamics and the reaction-product ratios of ion-neutral processes in the cold regime. It also paves the way for the realisation of fully energy-and state-controlled cold-collision experiments.

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“…A Paul Trap allows very long trapping times for ions, which in combination with cooling leads to applications in fields such as high resolution spectroscopy [1,2], quantum computation, quantum simulations [3] and cold chemistry [4,5]. Some ions such as 9 Be + can be conveniently laser cooled [6,7], most, however, cannot.…”

Section: Introductionmentioning

confidence: 99%

\(\bar{\text{H}}^{+}\) Sympathetic Cooling Simulations with a Variable Time Step

Sillitoe

Karr

Heinrich

et al. 2017

Proceedings of the 12th International Conference on Low Energy Antiproton Physics (LEAP2016)

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In this paper we present a new variable time step criterion for the velocity-Verlet algorithm allowing to correctly simulate the dynamics of charged particles exchanging energy via Coulomb collisions while minimising simulation time. We present physical arguments supporting the use of the criterion along with numerical results proving its validity. We numerically show thatH + ions with 18 meV initial energy can be captured and sympathetically cooled by a Coulomb crystal of Be + and HD + in less than 10 ms, an important result for the GBAR project.

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Ion-Atom and Ion-Molecule Hybrid Systems: Ion-Neutral Chemistry at Ultralow Energies

Cited by 11 publications

References 37 publications

Synthesis of mixed hypermetallic oxide BaOCa ⁺ from laser-cooled reagents in an atom-ion hybrid trap

Synthesis of mixed hypermetallic oxide BaOCa ⁺ from laser-cooled reagents in an atom-ion hybrid trap

A Dynamic Ion–Atom Hybrid Trap for High‐Resolution Cold‐Collision Studies

\(\bar{\text{H}}^{+}\) Sympathetic Cooling Simulations with a Variable Time Step

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Ion-Atom and Ion-Molecule Hybrid Systems: Ion-Neutral Chemistry at Ultralow Energies

Cited by 11 publications

References 37 publications

Synthesis of mixed hypermetallic oxide BaOCa + from laser-cooled reagents in an atom-ion hybrid trap

Synthesis of mixed hypermetallic oxide BaOCa + from laser-cooled reagents in an atom-ion hybrid trap

A Dynamic Ion–Atom Hybrid Trap for High‐Resolution Cold‐Collision Studies

\(\bar{\text{H}}^{+}\) Sympathetic Cooling Simulations with a Variable Time Step

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Synthesis of mixed hypermetallic oxide BaOCa ⁺ from laser-cooled reagents in an atom-ion hybrid trap

Synthesis of mixed hypermetallic oxide BaOCa ⁺ from laser-cooled reagents in an atom-ion hybrid trap