I= TWO-PHOTON LASER OPTOGALVANIC SPECTROSCOPIC STUDIES OF KRYPTON AND XENON
Pakistan Research Repository Home
 

Title of Thesis
TWO-PHOTON LASER OPTOGALVANIC SPECTROSCOPIC STUDIES OF KRYPTON AND XENON

Author(s)
Mushtaz Ahmed
Institute/University/Department Details
Department of Physics/ Quaid-i-Azam University, Islamabad
Session
1997
Subject
Physics
Number of Pages
81
Keywords (Extracted from title, table of contents and abstract of thesis)
photon laser, optogalvanic spectroscopic studies, krypton, xenon, odd parity, rydberg series, odd parity bound, autoionized rydberg, multichannel quantum defect theory, rare gases, rydberg atoms

Abstract
We report extensive new data on the odd parity Rydberg series of krypton and xenon using single colour two photon laser optogalvanic spectroscopy. In krypton the odd parity bound and autoionized Rydberg series are excited from the 4p55s[3/2]2 and 4p55s'[1/2]0 metastable levels respectively. A total ten odd parity 4p5nd[1/2]0,1. 4p5nd[3/2]2, 4p5nd[5/2]2,3' 4p5nd[7/2]3,4, 4p5ns[3/2]2, 4p5ns'[1/2]0 and unresolved 4p5nd'[3/2]2 (or 4p5nd'[5/2]2 ) Rydberg series are observed. The 4p5nd[1/2]0, 4p5nd[7/2]4' 4p5nd'[3/2]2 or 4p5nd'[5/2]2 and 4p5ns'[1/2]0 series for high n values are reported for the first time. The 4p5nd[1/2]0, 4p5nd[7/2]4' 4p5ns[3/2]2, 4p5nd'[3/2]2 or (4p5nd'[5/2]2) and 4p5ns,[1/2]0 Rydberg series have been observed up to n = 23, 49, 44, 39 and 36 respectively. The interchannel interaction among the overlapping Rydberg series has been studied using the multichannel quantum defect theory for J = 0, 2 and 3. In addition, the two photon parity forbidden Rydberg series 4p5np[1/2]1 excited from the 4p55s[3/2]2 level is also observed. In xenon the odd parity bound Rydberg series are excited from the 5p56s[3/2]2 metastable level. A total of eight odd parity 5p5nd[1/2]0,1' 5p5nd[3/2]2, 4p5nd[5/2]2,3' 5p5nd[7/2]3,4 and 5p5ns[3/2]2 Rydberg series are observed. The 5p5nd[1/2]0, 5p5nd[7/2]4 and 5p5ns[3/2]2 series for high n values are reported for the first time. The 5p5nd[1/2]0, 5psnd[7/2]4 and 5p5ns[3/2]2 series have been observed up to n = 21, 47 and 44. We have also observed an even parity (two photon parity forbidden). 5p5np[5/2]2 Rydberg series excited from the 5p56s[3/2]2 metastable level. The multichannel quantum defect theory analysis for the odd parity bound levels of J = 0, 2 and 3 has been performed. Besides the two photon Rydberg series we have also observed a number of one photon transitions excited from the 5p55d configuration in the reported spectral region. Some of them can be grouped into 5p5nf Rydberg series. The 5p5nf series have been observed up to n = 31.

Download Full Thesis
846.1 KB
S. No. Chapter Title of the Chapters Page Size (KB)
1 0 Contents 0
75.78 KB
2 1 Introduction 1
85.12 KB
  1.1 Rydberg Atoms 1
  1.2 Structure of Rare Gases 2
  1.3 Previous Work 5
  1.4 Present Work 6
  1.5 Layout of Thesis 7
3 2 Theoretical Aspects 8
237.44 KB
  2.1 Discharge 8
  2.2 Optogalvanic Spectroscopy 12
  2.3 Two Photon Spectroscopy 15
  2.4 Multichannel Quantum Defect Theory 21
4 3 Experimental Set Up 27
52.65 KB
5 4 Two Photon Laser Optogalvanic Spectroscopic Studies of krypton 31
204.14 KB
  4.1 Introduction 31
  4.2 Results and Discussion 33
  4.3 Conclusion 42
  4.4 Tables 43
6 5 Two Photon Laser Optogalvanic Spectroscopic Studies of Xenon 48
291.21 KB
  5.1 Introduction 48
  5.2 Results and Discussion 49
  5.3 Conclusion 59
  5.4 Tables 61
  5.5 References 68