Cold N+NH Collisions in a Magnetic Trap

Abstract

We present an experimental and theoretical study of atom-molecule collisions in a mixture of cold, trapped atomic nitrogen and NH molecules at a temperature of $\sim 600$~mK. We measure a small N+NH trap loss rate coefficient of $k_{\mathrm{loss}}^{(\mathrm{N}+\mathrm{NH})}=8(4)\times 10^{-13}$~cm${}^3$s${}^{-1}$. Accurate quantum scattering calculations based on {\it ab initio} interaction potentials are in agreement with experiment and indicate the magnetic dipole interaction to be the dominant loss mechanism. Our theory further indicates the ratio of N+NH elastic to inelastic collisions remains large ($>100$) into the mK regime.

References in corpus (20)

• Quantum computation with trapped polar molecules
• Cold and Ultracold Molecules: Science, Technology, and Applications
• Quantum-State Controlled Chemical Reactions of Ultracold KRb Molecules
• Dipolar collisions of polar molecules in the quantum regime
• Measurement of the electron electric dipole moment using YbF molecules
• Quantum gas of rovibronic ground-state molecules in an optical lattice
• Quantum magnetism with multicomponent polar molecules in an optical lattice
• Experimental investigation of ultracold atom-molecule collisions
• Atom-molecule collisions in an optically trapped gas
• Search for the electric dipole moment of the electron with thorium monoxide
• Low-energy molecular collisions in a permanent magnetic trap
• Ultracold Rb-OH collisions and prospects for sympathetic cooling
• Production of ultracold NH molecules by sympathetic cooling with Mg
• Mechanism of Collisional Spin Relaxation in Triplet-Sigma Molecules
• Magnetic trapping of atomic nitrogen (14^N) and cotrapping of NH (X-triplet-Sigma-)
• The depletion of NO in pre-protostellar cores
• The prospects for producing ultracold NH${}_3$ molecules by sympathetic cooling: a survey of interaction potentials
• Cold collisions of N atoms and NH molecules in magnetic fields
• Formation of van der Waals molecules in buffer gas cooled magnetic traps
• Collisional properties of cold spin-polarized nitrogen gas: theory, experiment, and prospects as a sympathetic coolant for trapped atoms and molecules

Cited by in corpus (47)

• The Buffer Gas Beam: An Intense, Cold, and Slow Source for Atoms and Molecules
• Manipulation of Molecules with Electromagnetic Fields
• Observation of magnetically tunable Feshbach resonances in ultracold ${}^{23}$Na${}^{40}$K+${}^{40}$K collisions
• Statistical Aspects of Ultracold Resonant Scattering
• Resonant collisional shielding of reactive molecules using electric fields
• Collisional Cooling of Ultracold Molecules
• Cold heteromolecular dipolar collisions
• Laser slowing of CaF molecules to near the capture velocity of a molecular MOT
• Collisions between cold molecules in a superconducting magnetic trap
• Large Effects of Electric Fields on Atom-Molecule Collisions at Millikelvin Temperatures
• Ultracold Sticky Collisions: Theoretical and Experimental Status
• Magnetic Trapping of Molecules via Optical Loading and Magnetic Slowing
• Shielding ${}^2\Sigma$ ultracold dipolar molecular collisions with electric fields
• Quantum reactive scattering of ultracold NH($X{}^3{\Sigma }^{-}$) radicals in a magnetic trap
• Collisions Between Ultracold Molecules and Atoms in a Magnetic Trap
• Structure of the Alkali-metal-atom-Strontium molecular ions: towards photoassociation and formation of cold molecular ions
• Ultracold spin-polarized mixtures of 2Sigma molecules with S-state atoms: Collisional stability and implications for sympathetic cooling
• Cold and ultracold NH--NH collisions in magnetic fields
• Sympathetic cooling of polyatomic molecules with S-state atoms in a magnetic trap
• Atomic Rydberg Reservoirs for Polar Molecules
• Atom-molecule collisions, spin relaxation, and sympathetic cooling in an ultracold spin-polarized Rb(${}^2\mathrm{S}$)-SrF${(}^2{\Sigma }^{+})$ mixture
• The approach to chaos in ultracold atomic and molecular physics: statistics of near-threshold bound states for Li+CaH and Li+CaF
• Efficient method for quantum calculations of molecule - molecule scattering properties in a magnetic field
• Cold and ultracold NH--NH collisions: The field-free case
• Molecular Collisions: from Near-cold to Ultra-cold
• Cold collisions of heavy ${}^2\Sigma$ molecules with alkali-metal atoms in a magnetic field: Ab initio analysis and prospects for sympathetic cooling of SrOH${(}^2\Sigma )$ by Li(${}^2$S)
• Ultracold $O_2$+$O_2$ collisions in a magnetic field: on the role of the potential energy surface
• Probing ultracold chemistry using ion spectrometry
• Multistage Zeeman deceleration of NH $X{}^3{\Sigma }^{-}$ radicals
• One dimensional magneto-optical compression of a cold CaF molecular beam
• Ab Initio Study of Chemical Reactions of Cold SrF and CaF Molecules with Alkali-Metal and Alkaline-Earth-Metal Atoms
• On the role of the magnetic dipolar interaction in cold and ultracold collisions: Numerical and analytical results for NH(${}^3{\Sigma }^{-}$) + NH(${}^3{\Sigma }^{-}$)
• Total angular momentum representation for atom-molecule collisions in electric fields
• Quantum rainbow scattering at tunable velocities
• Low-energy collisions between carbon atoms and oxygen molecules in a magnetic trap
• Cold collisions of polyatomic molecular radicals with S-state atoms in a magnetic field: An ab initio study of He + CH2(X) collisions
• Long-range interactions between an atom in its ground S state and an open-shell linear molecule
• Optical stimulated slowing of polar heavy-atom molecules with a constant beat phase
• Collisions in a dual-species magneto-optical trap of molecules and atoms
• Collisions Between Ultracold Atoms and Cold Molecules in a Dual Electrostatic-Magnetic Trap
• Dynamics of a buffer-gas-loaded, deep optical trap for molecules
• Magnetic Feshbach resonances in ultracold atom-molecule collisions
• Nuclear spin relaxation in cold atom-molecule collisions
• Total angular momentum representation for state-to-state quantum scattering of cold molecules in a magnetic field
• Cold collisions of an open-shell S-state atom with a ^2Pi molecule: N(^4S) colliding with OH in a magnetic field
• Measurements of trap dynamics of cold OH molecules using resonance enhanced multiphoton ionization
• Ultracold molecular collisions in magnetic fields: Efficient incorporation of hyperfine structure in the total rotational angular momentum representation