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Título
Effects of reagent rotation on interferences in the product angular distributions of chemical reactions
Autor(es)
Materia
Química física
Reagent rotation
Chemical reactions
Clasificación UNESCO
2210 Química Física
Fecha de publicación
2016
Citación
Jambrina, P. G., Aldegunde, J., Aoiz, F. J., Sneha, M., & Zare, R. N. (2015). Effects of reagent rotation on interferences in the product angular distributions of chemical reactions. Chemical science, 7(1), 642-649.
Resumen
[EN] Differential cross sections (DSCs) of the HD(v0 , j0) product for the reaction of H atoms with supersonically
cooled D2 molecules in a small number of initial rotational states have been measured at a collision
energy of 1.97 eV. These DCSs show an oscillatory pattern that results from interferences caused by
different dynamical scattering mechanisms leading to products scattered into the same solid angle. The
interferences depend on the initial rotational state j of the D2(v ¼ 0, j) reagent and diminish in strength
with increasing rotation. We present here a detailed explanation for this behavior and how each
dynamical scattering mechanism has a dependence on the helicity U, the projection of the initial
rotational angular momentum j of the D2 reagent on the approach direction. Each helicity corresponds
to a different internuclear axis distribution, with the consequence that the dependence on U reveals the
preference of the different quasiclassical mechanisms as a function of approach direction. We believe
that these results are general and will appear in any reaction for which several mechanisms are operative.
URI
ISSN
2041-6520
DOI
10.1039/c5sc03373j
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