GLOBAL FIT OF THE B-X SYSTEM OF $Na_{3}$ USING A NEW MODEL HAMILTONIAN
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Date
1996
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Publisher
Ohio State University
Abstract
The A and X states $Na_{3}$ can be thought of as ordinary asymmetric rotors (complicated slightly by spinrotation interaction) but the B state must be treated as a floppy molecule since it exhibits an almost free pseudorotational $motion^{1,2}$. Because of the peculiar nature of the centrifugal distortion in the B state, previous fitting of the B-X system has been most successful for P and R type transitions involving ground state levels characterized by $J, K_{a}, K_{a} = J, 0, J$ or J, 1, J-1, i.e., levels with $J-K_{c} = 0$ or 1. The present talk will describe our progress in globally fitting recently $recorded^{3}$ transitions involving levels with $J-K_{c} > 1$ in order to more thoroughly test the correctness of the recently developed model $Hamiltonian^{2}$. In addition, our experiments have revealed an unexpected splitting of each Coriolis component in pseudorotational states with angular momentum quantum number $j\geq{1}$. This small splitting--like the larger Coriolis splitting itself--is approximately proportional to $j^{4}$. We believe it arises from some type of interaction between the electron spin angular momentum and the pseudorotational angular momentum. Our attempts to describe this phenomenon will also be discussed.
Description
Author Institution: Department of Physics, The Pennsylvania State University