Stark and zeeman effect in the [18.5]2∆ 3/2 - X2∆3/2 transition of thorium monofluoride

Nguyen, Duc-Trung

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https://hdl.handle.net/2142/100829 Copy

Description

Title

Stark and zeeman effect in the [18.5]2∆ 3/2 - X2∆3/2 transition of thorium monofluoride

Author(s)

Nguyen, Duc-Trung

Contributor(s)

Steimle, Timothy

Issue Date

2018-06-21

Keyword(s)

Electronic structure, potential energy surfaces

Abstract

Studies of the bonding and electronic structure of simple actinide compoundsbcde are attractive because they provide insight into the chemistry of more complex molecules associated with radioactive waste. These molecules are the most effective venues for developing a synergism between theory and experiment. The primary goal of the present study is to understand and identify different levels of covalency in a series of gas phase actinides and lanthanides containing molecules via the determination of the permanent electric dipole moment, µ, and magnetic g-factors. The electronic spectrum of ThF has been investigated using: a) medium resolution two dimensional (2D)f ; ultrahigh field free, Stark, and Zeeman spectroscopy of a supersonically cooled molecular beam sample. A strong band system near 540 nm was detected and the Stark shifts and splitting were analyzed to produce µ values of 1.426(18)D and 0.586(30)D, for the X2∆3/2 and [18.5] Ω=3/2 states, respectively. Zeeman splittings were analyzed to show that both the ground and excited [18.5] Ω=3/2 states are predominately 2∆3/2 spin-orbit components. A molecular orbital correlation diagram will be used to rationalize the observed very small µ values, the electronic state distribution, and garner insight into the bonding mechanism.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100829

DOI

10.15278/isms.2018.RJ03

Copyright and License Information

Copyright 2018 Duc-Trung Nguyen

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