I= MAGNETO-OPTICAL SPECTROSCOPY OF THALLIUM, COPPER AND SILVER USING SYNCHROTRON RADIATION
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Title of Thesis
MAGNETO-OPTICAL SPECTROSCOPY OF THALLIUM, COPPER AND SILVER USING SYNCHROTRON RADIATION

Author(s)
Abdul Rashid
Institute/University/Department Details
Department of Physics/ Quaid-i-Azam University, Islamabad
Session
1998
Subject
Physics
Number of Pages
123
Keywords (Extracted from title, table of contents and abstract of thesis)
magneto-optical spectroscopy, thallium, copper, silver, synchrotron radiation, magneto-optical absorption, oscillator strengths, photoionization cross section

Abstract
The magneto-optical absorption spectroscopy experiments on thallium, copper and silver are presented. The experimental setup and the method of analysis. are described. The data were acquired utilizing the linearly polarized light emitted by the 2.5 GeV electron accelerator, a 6 Tesla superconducting magnet, and a 3-meter high dispersion spectrograph with the photographic detection.

The magneto-optical absorption spectra of thallium were recorded in the wavelength range from 2020 A to 2090 A. Measurements of oscillator strengths (relative f-value) for the principal series of thallium

6s2 6p 2p1/2 †’ 6s2 nd 2D3/2 (12 ‰ n ‰ 24)

6s2 ns 2S ½ (14 ‰ n ‰ 23)

are reported. A quantum defect plot of the density of oscillator strengths of discrete transitions in thallium yields the photoionization cross section at the threshold as 1.68 ± 0.15 Mb for the s-series and 7.77 ± 0.23 Mb for the d-series.

In case of copper, the magneto-optical absorption spectra are reported in the wavelength range 1600 A - 1850 A. The oscillator strengths for the transitions

3d10 4s 2S1/2 †’ 3d10 np 2Pl/2 (7 ‰n ‰13)

3d10 4s 2S1/2 †’ 3d10 np 2P3/2 (7 ‰n ‰23)

have been measured, and comparison with the earlier work has been reported. The quantum defect plot of the density of oscillator strength of the discrete transition has been plotted and compared with the alkali atoms.

The magneto-optical absorption spectra of silver are reported in the wavelength range of 1630 A to 1730 A. This wavelength range includes the electric dipole transitions:

4d10 5s 2S1/2 †’ 4d10 np 2P1/2,.3/2 (9 ‰ n ‰ 23)

3d10 4s 2S1/2 †’ 3d9 5s5p 4P1/2,.3/2

The oscillator strengths for the above transition have been measured. The quantum defect plot of the density of oscillator strengths of the discrete transitions has been plotted.

Download Full Thesis
11809.68 KB
S. No. Chapter Title of the Chapters Page Size (KB)
1 0 Contents 0
1204.83 KB
2 1 Introduction 1
10673.15 KB
  1.1 Oscillator Strengths 2
  1.2 Einstein Probabilities Coefficient 3
  1.3 Survey of the Experimental Methods 4
  1.4 Atomic Lifetimes Measurements 7
  1.5 Thesis Overview 9
3 2 Influence of the External Fields 10
1357.82 KB
  2.1 Background 10
  2.2 The Basic Hamiltonian 11
  2.3 The Paramagnetic Effects 13
  2.4 Diamagnetic Region 17
4 3 Magneto-Optical Rotation Spectroscopy 22
1571.99 KB
  3.1 Background 22
  3.2 Principle of the Faraday Effect 23
  3.3 Magneto-Optical Vernier Technique 33
  3.4 Computer Simulation of an Experimental Profile 35
  3.5 Instrument Considerations 36
5 4 Experimental Scheme 38
1497.23 KB
  4.1 Background 38
  4.2 Synchrotron Radiation 39
  4.3 Super Conducting Magnet 41
  4.4 Absorption Cell 44
  4.5 Spectrograph 49
  4.6 Wavelength Standards 50
  4.7 Microdensitometer 50
6 5 Magneto-Optical Spectra of Thallium 51
1286.05 KB
7 6 Introduction 51
2652.46 KB
8 7 Analysis of the Magneto-optical Rotation Patterns 53
1263.15 KB
  7.1 Results and Discussions 54