16 research outputs found
Chemical pathways in ultracold reactions of SrF molecules
We present a theoretical investigation of the chemical reaction SrF + SrF
products, focusing on reactions at ultralow temperatures. We find
that bond swapping, SrF + SrF Sr + F, is energetically
forbidden at these temperatures. Rather, the only energetically allowed
reaction is SrF + SrF SrF + Sr, and even then only singlet
states of the SrF trimer can form. A calculation along a reduced reaction
path demonstrates that this abstraction reaction is barrierless, and proceeds
by one SrF molecule "handing off" a fluorine atom to the other molecule.Comment: Two column format, 7 pages, 3 figures. Submitted to PR
Resonances in rotationally inelastic scattering of OH() with helium and neon
We present detailed calculations on resonances in rotationally and spin-orbit
inelastic scattering of OH (X\,^2\Pi, j=3/2, F_1, f) radicals with He and Ne
atoms. We calculate new \emph{ab initio} potential energy surfaces for OH-He,
and the cross sections derived from these surfaces compare favorably with the
recent crossed beam scattering experiment of Kirste \emph{et al.} [Phys. Rev. A
\textbf{82}, 042717 (2010)]. We identify both shape and Feshbach resonances in
the integral and differential state-to-state scattering cross sections, and we
discuss the prospects for experimentally observing scattering resonances using
Stark decelerated beams of OH radicals.Comment: 14 pages, 15 Figure
Scattering of Stark-decelerated OH radicals with rare-gas atoms
We present a combined experimental and theoretical study on the rotationally
inelastic scattering of OH (X\,^2\Pi_{3/2}, J=3/2, f) radicals with the
collision partners He, Ne, Ar, Kr, Xe, and D as a function of the collision
energy between cm and 400~cm. The OH radicals are state
selected and velocity tuned prior to the collision using a Stark decelerator,
and field-free parity-resolved state-to-state inelastic relative scattering
cross sections are measured in a crossed molecular beam configuration. For all
OH-rare gas atom systems excellent agreement is obtained with the cross
sections predicted by close-coupling scattering calculations based on accurate
\emph{ab initio} potential energy surfaces. This series of experiments
complements recent studies on the scattering of OH radicals with Xe [Gilijamse
\emph{et al.}, Science {\bf 313}, 1617 (2006)], Ar [Scharfenberg \emph{et al.},
Phys. Chem. Chem. Phys. {\bf 12}, 10660 (2010)], He, and D [Kirste \emph{et
al.}, Phys. Rev. A {\bf 82}, 042717 (2010)]. A comparison of the relative
scattering cross sections for this set of collision partners reveals
interesting trends in the scattering behavior.Comment: 10 pages, 5 figure
Quantum-state resolved bimolecular collisions of velocity-controlled oh with no radicals
Contains fulltext :
103660.pdf (publisher's version ) (Closed access)
Contains fulltext :
103660.pdf (preprint version ) (Closed access
Resonances in rotationally inelastic scattering of NH3 and ND3 with H-2
Contains fulltext :
149631.pdf (publisher's version ) (Open Access
Taming molecular beams
Contains fulltext :
98803.pdf (preprint version ) (Open Access