Rotational dynamics of a diatomic molecular ion in a Paul trap
2015 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 143, 204308Article in journal (Refereed) Published
We present models for a heteronuclear diatomic molecular ion in a linear Paul trap in a rigid-rotor approximation, one purely classical and the other where the center-of-mass motion is treated classically, while rotational motion is quantized. We study the rotational dynamics and their influenceon the motion of the center-of-mass, in the presence of the coupling between the permanent dipole moment of the ion and the trapping electric field. We show that the presence of the permanent dipole moment affects the trajectory of the ion and that it departs from the Mathieu equation solution found for atomic ions. For the case of quantum rotations, we also evidence the effect of the above-mentioned coupling on the rotational states of the ion.
Place, publisher, year, edition, pages
2015. Vol. 143, 204308
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:umu:diva-111920DOI: 10.1063/1.4936425ISI: 000366319700019PubMedID: 26627960OAI: oai:DiVA.org:umu-111920DiVA: diva2:874156
FunderSwedish National Infrastructure for Computing (SNIC), 2014/1-305