MILLIMETER WAVE SPECTROSCOPY OF RYDBERG STATES OF MOLECULES IN THE REGION OF 260-295 GHz

Grimes, David

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https://hdl.handle.net/2142/79229 Copy

Description

Title

MILLIMETER WAVE SPECTROSCOPY OF RYDBERG STATES OF MOLECULES IN THE REGION OF 260-295 GHz

Author(s)

Grimes, David

Contributor(s)

• Field, Robert W.
• Barnum, Timothy J.
• Zhou, Yan

Issue Date

23-Jun-15

Keyword(s)

Rydberg Atoms and Molecules

Abstract

Free induction decay detected chirped pulse millimeter wave spectroscopy of Rydberg-Rydberg transitions in atoms and molecules is a powerful and flexible method for characterizing the electronic structure of Rydberg states and determining the structure and dynamics of the ion-core. Complicating the use of this technique are the difficulties in reliably and repeatedly accessing not just the most information rich core-nonpenetrating states, but also the low-$ell$ core-penetrating Rydberg states in the area of principal quantum number textit{n}$^{*}$ $>35$. Small transition moments and narrow linewidths for transitions between valence electronic states and high Rydberg states are the primary limiting factor. We demonstrate a simple method to avoid the problem entirely by using chirped pulse technology operating in the frequency range of 260-295 GHz, which allows us to sample a lower range of textit{n}$^{*}$ values than before with comparable frequency resolution and accuracy as our previous W-band experiments. Further improvements to our experiment in order to accurately capture details of Stark demolition, a technique that provides rapid differentiation between core-penetrating and core-nonpenetrating states, will also be discussed.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

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http://hdl.handle.net/2142/79229

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