Differential scattering of cold molecules in superimposed electric and magnetic fields

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We present a detailed theoretical study of differential cross sections
for inelastic collisions of (2)Sigma molecules in the presence of
superimposed electric and magnetic fields. Using rigorous quantum
dynamical calculations, we show that the angular dependence of cross
sections for Zeeman relaxation in collisions of CaD molecules with He
atoms at low temperatures can be significantly modified by electric
fields of less than 100 kV/cm. Our results suggest that the
differential scattering cross sections are more sensitive to the
electric field than the averaged integral cross sections. We show that
the integral cross sections corresponding to a fixed orientation of the
incoming collision flux may exhibit interference effects induced by
electric fields. (C) 2008 American Institute of Physics.

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