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Development of Experimental Methods, Data Analysis and Standards in Atomic Spectroscopy

Öberg, Kasper LU (2007)
Abstract (Swedish)
Popular Abstract in Swedish

Denna avhandling handlar om experimentella tekniker och dataanalys inom atomspektroskopi. Förbättrade metoder för analys av spektra och bestämning av nivåenergier presenteras, där de flesta bygger på en rigorös statistisk behandling av spektroskopisk data. Starka linjer i spektrumet från envärt joniserat neon mellan 2000 och 5000Å föreslås som våglängdsstandarder. Dessa har undersökts med Fouriertransformspektroskopi på ljuset från en hålkatodlampa. Neon hat två isotoper som påverkar utseendet på spektrallinjerna. För att erhålla noggranna våglängder genomfördes därför en detaljerad analys av linjeprofilerna. En penninglampa introduceras som plasmakälla för livstidsmätningar genom tidsupplöst... (More)
Popular Abstract in Swedish

Denna avhandling handlar om experimentella tekniker och dataanalys inom atomspektroskopi. Förbättrade metoder för analys av spektra och bestämning av nivåenergier presenteras, där de flesta bygger på en rigorös statistisk behandling av spektroskopisk data. Starka linjer i spektrumet från envärt joniserat neon mellan 2000 och 5000Å föreslås som våglängdsstandarder. Dessa har undersökts med Fouriertransformspektroskopi på ljuset från en hålkatodlampa. Neon hat två isotoper som påverkar utseendet på spektrallinjerna. För att erhålla noggranna våglängder genomfördes därför en detaljerad analys av linjeprofilerna. En penninglampa introduceras som plasmakälla för livstidsmätningar genom tidsupplöst laserspektroskopi. Denna lampa visade sig ha stora fördelar över andra ? mer vanliga ? plasmakällor. Livstider i tvåvärt joniserat ytterbium mättes, vilka kombinerades med relativa intensiteter från Fouriertransformspektra av penninglampan för att ge experimentella livstider för jonen. (Less)
Abstract
The focus of this work is on the experimental techniques and data analysis in atomic spectroscopy. Improved methods for the analysis of spectra and the determination of level energies are presented. Most of these are based on a rigorous statistical treatment of the spectroscopic data. Strong lines in the spectrum of singly-ionized neon between 2000 and 5000Å are suggested as tertiary wavelength standards. These have been investigated by means of Fourier-transform spectroscopy on the light from a hollow-cathode source. Neon has two isotopes that affect the shape of the spectral lines. In order to derive accurate wavelengths, this was accounted for by a detailed deconvolution of the line profiles. A Penning-discharge lamp is introduced as a... (More)
The focus of this work is on the experimental techniques and data analysis in atomic spectroscopy. Improved methods for the analysis of spectra and the determination of level energies are presented. Most of these are based on a rigorous statistical treatment of the spectroscopic data. Strong lines in the spectrum of singly-ionized neon between 2000 and 5000Å are suggested as tertiary wavelength standards. These have been investigated by means of Fourier-transform spectroscopy on the light from a hollow-cathode source. Neon has two isotopes that affect the shape of the spectral lines. In order to derive accurate wavelengths, this was accounted for by a detailed deconvolution of the line profiles. A Penning-discharge lamp is introduced as a plasma source for radiative lifetime measurements by the time-resolved laser-induced fluorescence technique. This lamp proved to have significant advantages over more commonly used plasma sources. Lifetimes in doubly-ionized ytterbium were measured, which were combined with relative line intensities from Fourier-transform spectra of the Penning-discharge lamp, yielding experimental transition probabilities of the species. (Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Dr. Sansonetti, Craig, Atomic Physics Division, NIST, Gaithersburg, USA
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Atom- och molekylärfysik, Atomic and molecular physics, ytterbium, spectroscopy, radiative lifetimes, oscillator strengths, neon, line shapes, light sources, Fourier-transform spectroscopy, branching fractions, Stark effect, spectroscopic techniques, LIF, Atomic data
pages
124 pages
publisher
Lund Observatory, Lund University
defense location
Lundmarksalen Lund Observatory Sölvegatan 27 Lund
defense date
2007-02-03 10:15
ISBN
978-91-628-7046-1
language
English
LU publication?
yes
id
9207e681-81de-4902-8851-25a51ba01808 (old id 547906)
date added to LUP
2007-09-06 10:55:11
date last changed
2016-09-19 08:45:06
@misc{9207e681-81de-4902-8851-25a51ba01808,
  abstract     = {The focus of this work is on the experimental techniques and data analysis in atomic spectroscopy. Improved methods for the analysis of spectra and the determination of level energies are presented. Most of these are based on a rigorous statistical treatment of the spectroscopic data. Strong lines in the spectrum of singly-ionized neon between 2000 and 5000Å are suggested as tertiary wavelength standards. These have been investigated by means of Fourier-transform spectroscopy on the light from a hollow-cathode source. Neon has two isotopes that affect the shape of the spectral lines. In order to derive accurate wavelengths, this was accounted for by a detailed deconvolution of the line profiles. A Penning-discharge lamp is introduced as a plasma source for radiative lifetime measurements by the time-resolved laser-induced fluorescence technique. This lamp proved to have significant advantages over more commonly used plasma sources. Lifetimes in doubly-ionized ytterbium were measured, which were combined with relative line intensities from Fourier-transform spectra of the Penning-discharge lamp, yielding experimental transition probabilities of the species.},
  author       = {Öberg, Kasper},
  isbn         = {978-91-628-7046-1},
  keyword      = {Atom- och molekylärfysik,Atomic and molecular physics,ytterbium,spectroscopy,radiative lifetimes,oscillator strengths,neon,line shapes,light sources,Fourier-transform spectroscopy,branching fractions,Stark effect,spectroscopic techniques,LIF,Atomic data},
  language     = {eng},
  pages        = {124},
  publisher    = {ARRAY(0xde2a6c8)},
  title        = {Development of Experimental Methods, Data Analysis and Standards in Atomic Spectroscopy},
  year         = {2007},
}