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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.
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Chapter |
Title of the Chapters |
Page |
Size (KB) |
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| 1 |
0 |
Contents |
0 |
75.78 KB |
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| 2 |
1 |
Introduction |
1 |
85.12 KB |
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1.1 |
Rydberg Atoms |
1 |
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1.2 |
Structure of Rare Gases |
2 |
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1.3 |
Previous Work |
5 |
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1.4 |
Present Work |
6 |
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1.5 |
Layout of Thesis |
7 |
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| 3 |
2 |
Theoretical Aspects |
8 |
237.44 KB |
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2.1 |
Discharge |
8 |
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2.2 |
Optogalvanic Spectroscopy |
12 |
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2.3 |
Two Photon Spectroscopy |
15 |
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2.4 |
Multichannel Quantum Defect Theory |
21 |
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| 4 |
3 |
Experimental Set Up |
27 |
52.65 KB |
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| 5 |
4 |
Two Photon Laser Optogalvanic Spectroscopic Studies of krypton |
31 |
204.14 KB |
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4.1 |
Introduction |
31 |
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4.2 |
Results and Discussion |
33 |
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4.3 |
Conclusion |
42 |
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4.4 |
Tables |
43 |
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| 6 |
5 |
Two Photon Laser Optogalvanic Spectroscopic Studies of Xenon |
48 |
291.21 KB |
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5.1 |
Introduction |
48 |
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5.2 |
Results and Discussion |
49 |
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5.3 |
Conclusion |
59 |
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5.4 |
Tables |
61 |
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5.5 |
References |
68 |
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