Cold heteromolecular dipolar collisions

Abstract

We present the first experimental observation of cold collisions between two different species of neutral polar molecules, each prepared in a single internal quantum state. Combining for the first time the techniques of Stark deceleration, magnetic trapping, and cryogenic buffer gas cooling allows the enhancement of molecular interaction time by 10${}^5$. This has enabled an absolute measurement of the total trap loss cross sections between OH and ND${}_3$ at a mean collision energy of 3.6 cm${}^{-1}$ (5 K). Due to the dipolar interaction, the total cross section increases upon application of an external polarizing electric field. Cross sections computed from \emph{ab initio} potential energy surfaces are in excellent agreement with the measured value at zero external electric field. The theory presented here represents the first such analysis of collisions between a ${}^2\Pi$ radical and a closed-shell polyatomic molecule.

7 pages, 5 figures

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Cited by in corpus (43)

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• Resonant collisional shielding of reactive molecules using electric fields
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• Laser slowing of CaF molecules to near the capture velocity of a molecular MOT
• Dynamics of gas phase Ne${}^{\ast }$ + NH${}_3$ and Ne${}^{\ast }$ + ND${}_3$ Penning ionization at low temperatures
• Magnetic Trapping of Molecules via Optical Loading and Magnetic Slowing
• Quantum state resolved molecular dipolar collisions over four decades of energy
• Controlling Spin-flips of Molecules in an Electromagnetic Trap
• Cryogenic Buffer Gas beams of AlF, CaF, MgF, YbF, Al, Ca, Yb and NO -- a comparison
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• Ultracold ${}^{88}{\mathrm{Sr}}_2$ molecules in the absolute ground state
• Molecular Collisions: from Near-cold to Ultra-cold
• Multistage Zeeman deceleration of metastable neon
• Layers of Cold Dipolar Molecules in the Harmonic Approximation
• Microwave state transfer and adiabatic dynamics of magnetically trapped polar molecules
• Controlling ultracold chemical reactions via Rydberg-dressed interactions
• Threshold resonance effects in reactive processes
• Ultracold hydrogen atoms: a versatile coolant to produce ultracold molecules
• Electric-field-controlled cold dipolar collisions between trapped CH${}_3$F molecules
• Total angular momentum representation for atom-molecule collisions in electric fields
• Low-energy collisions between carbon atoms and oxygen molecules in a magnetic trap
• Jost function description of near threshold resonances for coupled-channel scattering
• Cold collisions of polyatomic molecular radicals with S-state atoms in a magnetic field: An ab initio study of He + CH2(X) collisions
• Rotational-state purity of Stark-decelerated molecular beams
• Fast and High-Yield Loading of a D${}_2$ MOT of Potassium from a Cryogenic Buffer Gas Beam
• Conformer-selection by matter-wave interference
• Optical stimulated slowing of polar heavy-atom molecules with a constant beat phase
• Penning collisions between supersonically expanded metastable helium atoms and laser-cooled lithium atoms
• Collisions Between Ultracold Atoms and Cold Molecules in a Dual Electrostatic-Magnetic Trap
• Beyond the Limits of Conventional Stark Deceleration
• Thermodynamics of Dipolar Chain Systems
• Associative detachment of rubidium hydroxide
• Measurements of trap dynamics of cold OH molecules using resonance enhanced multiphoton ionization
• Enhancing radical molecular beams by skimmer cooling
• Vibrational quenching of the electronic ground state in ThO in cold collisions with ${}^3$He
• Classical crystal formation of dipoles in two dimensions
• Universal stereodynamics of cold atom-molecule collisions in electric fields