OSU Navigation Bar

The Ohio State University University Libraries Knowledge Bank

JAHN-TELLER AND PSEUDO JAHN-TELLER INTERACTIONS IN THE B STATE MANIFOLD OF THE SODIUM TRIMER

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/18752

Show full item record

Files Size Format View
1998-FB-09.jpg 138.4Kb JPEG image Thumbnail of JAHN-TELLER AND PSEUDO JAHN-TELLER INTERACTIONS IN THE B STATE MANIFOLD OF THE SODIUM TRIMER

Title: JAHN-TELLER AND PSEUDO JAHN-TELLER INTERACTIONS IN THE B STATE MANIFOLD OF THE SODIUM TRIMER
Creators: Golonzka, Oleg; Ernst, Wolfgang E.
Issue Date: 1998
Abstract: The B state of $Na_{3}$ is the result of the vibronic coupling of a $^{2}E'$ and a $^{2}A'_{1}$ state. The three states mix by pseudo Jahn-Teller (PJT) and Jahn-Teller (JT) interactions giving rise to three potential surfaces the lowest of which allows for free pseudorotational motion of the Na nuclei. Energy levels in the corresponding lowest vibronic states are well described by a new model $Hamiltonian^{a}$ which includes rotation and pseudorotation. In this talk, we link experimentally determined molecular parameters from the Ohashi-Hougen Hamiltonian to the potential surface picture used by molecular dynamics $theorists^{b,c}$. Of particular interest is the potential barrier to the pseudorotation which lies well below the lowest vibronic state. This small barrier can be caused by PJT or JT interaction or by a combination of both. The Hamiltonian parameter corresponding to the effective barrier height has been well determined from our analysis of high resolution spectra. Measured barrier parameters for different vibronic states allow to distinguish the influences of JT and PJT coupling on the shape of the barrier. Our study suggests that the lowest potential surface is dominated by linear PJT interaction with some smaller amount of quadratic PJT and linear JT coupling.
URI: http://hdl.handle.net/1811/18752
Other Identifiers: 1998-FB-09
Bookmark and Share