Files in this item

FilesDescriptionFormat

application/pdf

application/pdf1192750.pdf (9MB)
PresentationPDF

application/pdf

application/pdf3250.pdf (19kB)
AbstractPDF

Description

Title:PRECISION MEASUREMENT OF THE IONIZATION ENERGY OF METASTABLE He2
Author(s):Jansen, Paul
Contributor(s):Merkt, Frederic; Semeria, Luca
Subject(s):Mini-symposium: Frequency-Comb Spectroscopy
Abstract:Predicting the energy-level structure of molecules from first principles is one of the major goals and tasks of theoretical molecular physics and chemistry. Few-electron molecules are particularly attractive systems for comparison with experimental results because numerically ``exact'' predictions of molecular properties can in principle be obtained, i.e., predictions that are only limited in accuracy by the uncertainties of fundamental constants. We present absolute-frequency measurements of transitions from rotational levels of the a $^3\Sigma_\text{u}^+\,(v''=0)$ metastable state of He${_2}$ to $n$p Rydberg states. The transition frequencies are determined by one-photon UV spectroscopy in slow molecular beams using a narrow-band laser system referenced to a frequency comb. The ionization energy of metastable He$_2$ and the rotational structure of the X$^+$ $^2\Sigma_\text{u}^+\,(v^+=0)$ ground state of He${_2}^+$ have been determined with unprecedented precision and accuracy using Rydberg-series extrapolation.
Issue Date:06/18/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100645
DOI:10.15278/isms.2018.MG02
Other Identifier(s):MG02
Date Available in IDEALS:2018-08-17
2018-12-12


This item appears in the following Collection(s)

Item Statistics