A novel crossed-molecular-beam experiment for investigating reactions of state- and conformationally selected strong-field-seeking molecules

Abstract

The structure and quantum state of the reactants have a profound impact on the kinetics and dynamics of chemical reactions. Over the past years, significant advances have been made in the control and manipulation of molecules with external electric and magnetic fields in molecular-beam experiments for investigations of their state-, structure- and energy-specific chemical reactivity. Whereas studies for neutrals have so far mainly focused on weak-field-seeking species, we report here progress towards investigating reactions of strong-field-seeking molecules by introducing a novel crossed-molecular-beam experiment featuring an electrostatic deflector. The new setup enables the characterisation of state- and geometry-specific effects in reactions under single-collision conditions. As a proof of principle, we present results on the chemi-ionisation reaction of metastable neon atoms with rotationally state-selected carbonyl sulfide (OCS) molecules and show that the branching ratio between the Penning and dissociative ionisation pathways strongly depends on the initial rotational state of OCS.

arXiv comment8 pages, 6 figures

References in corpus (36)

• Observation of Quantum Effects in sub Kelvin Cold Reactions
• Slowing heavy, ground-state molecules using an alternating gradient decelerator
• Specific chemical reactivities of spatially separated 3-aminophenol conformers with cold Ca${}^{+}$ ions
• Quantum-state selection, alignment, and orientation of large molecules using static electric and laser fields
• Quantum-state resolved bimolecular collisions of velocity-controlled OH with NO radicals
• Direct probe of anisotropy in atom-molecule collisions via quantum scattering resonances
• Observation of different reactivities of para- and ortho-water towards cold diazenylium ions
• Spatially-controlled complex molecules and their applications
• A selector for structural isomers of neutral molecules
• Imaging the onset of the resonance regime in low-energy NO-He collisions
• Alternating Gradient Focusing and Deceleration of Polar Molecules
• Molecular movie of ultrafast coherent rotational dynamics
• State- and conformer-selected beams of aligned and oriented molecules for ultrafast diffraction studies
• Separating Para and Ortho Water
• Alternating gradient focusing and deceleration of large molecules
• Stark-selected beam of ground-state OCS molecules characterized by revivals of impulsive alignment
• Determining the nature of quantum resonances by probing elastic and reactive scattering in cold collisions
• Spatial separation of state- and size-selected neutral clusters
• Two-state wave packet for strong field-free molecular orientation
• CMISTARK: Python package for the Stark-effect calculation and symmetry classification of linear, symmetric and asymmetric top wavefunctions in dc electric fields
• Stark deceleration of OH radicals in low-field-seeking and high-field-seeking quantum states
• Chemical reactions of conformationally selected molecules in a beam with Coulomb-crystallized ions
• Getting a Grip on the Transverse Motion in a Zeeman Decelerator
• Microwave Lens for Polar Molecules
• A new concept multi-stage Zeeman decelerator
• Rotational-state-specific guiding of large molecules
• Multistage Zeeman deceleration of metastable neon
• Decelerating molecules with microwave fields
• High-resolution imaging of molecular collisions using a Zeeman decelerator
• Improved spatial separation of neutral molecules
• Knife edge skimming for improved separation of molecular species by the deflector
• Transport of polar molecules by an alternating gradient guide
• Quantum-chemistry-aided identification, synthesis and experimental validation of model systems for conformationally controlled reaction studies: Separation of the conformers of 2,3-dibromobuta-1,3-diene in the gas phase
• Production of rotationally cold methyl radicals in pulsed supersonic beams
• Spatial Separation of the Conformers of Methyl Vinyl Ketone
• Suppression of Penning ionization by orbital angular momentum conservation