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Title: Dye-laser intracavity absorption spectrum of deuterium molecule and the collisional quenching of molecular hydrogen

Abstract

The intracavity absorption technique (ICA) in a continuous wave (cw) multimode dye laser has been applied to the study of the molecular spectrum of D{sub 2} in the optical region (6185.28-5797.37 {angstrom}). This work represents the first attempt to directly observe the optical absorption spectrum of D{sub 2} whereas only the emission spectrum in the region was previously available. In the course of an extensive analysis of our data, new transition assignments were given to lines that were not previously observed in emission. Furthermore, some wrong assignments that existed in the previously published literature have been corrected. Besides the expected transitions originating from the 2c{sup {minus}} state ({tau}: 10{sup {minus}3}s), transitions from very short lived states such as 2a, 2c{sup +}, 2C{sup {plus minus}}, 2B ({tau}: 10{sup {minus}8} {yields} 10{sup {minus}9}s) were also observed, which shows ICA to be highly sensitive to detection of very weak absorption lines. In the second part of this research project the proportionality of the ICA signal to number density has been used to investigate the collisional quenching of the 2c{sup 3}{Phi}{sub u} state of H{sub 2} by H{sub 2}, N{sub 2} Ar, Ne, and He over various vibrational and rotational levels. The study wasmore » carried out in an rf (radio frequency) produced plasma containing mixtures of the various gases.« less

Authors:
Publication Date:
Research Org.:
State Univ. of New York, Buffalo, NY (USA)
OSTI Identifier:
5469196
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ARGON; ATOM-MOLECULE COLLISIONS; DEUTERIUM; ABSORPTION SPECTRA; HYDROGEN; MOLECULE-MOLECULE COLLISIONS; NEON; NITROGEN; CORRECTIONS; DYE LASERS; ENERGY-LEVEL TRANSITIONS; LASER CAVITIES; MOLECULES; RADIOWAVE RADIATION; VISIBLE SPECTRA; ATOM COLLISIONS; COLLISIONS; ELECTROMAGNETIC RADIATION; ELEMENTS; FLUIDS; GASES; HYDROGEN ISOTOPES; ISOTOPES; LASERS; LIGHT NUCLEI; LIQUID LASERS; MOLECULE COLLISIONS; NONMETALS; NUCLEI; ODD-ODD NUCLEI; RADIATIONS; RARE GASES; SPECTRA; STABLE ISOTOPES; 640302* - Atomic, Molecular & Chemical Physics- Atomic & Molecular Properties & Theory; 640304 - Atomic, Molecular & Chemical Physics- Collision Phenomena

Citation Formats

Banerjee, A K. Dye-laser intracavity absorption spectrum of deuterium molecule and the collisional quenching of molecular hydrogen. United States: N. p., 1988. Web.
Banerjee, A K. Dye-laser intracavity absorption spectrum of deuterium molecule and the collisional quenching of molecular hydrogen. United States.
Banerjee, A K. Fri . "Dye-laser intracavity absorption spectrum of deuterium molecule and the collisional quenching of molecular hydrogen". United States.
@article{osti_5469196,
title = {Dye-laser intracavity absorption spectrum of deuterium molecule and the collisional quenching of molecular hydrogen},
author = {Banerjee, A K},
abstractNote = {The intracavity absorption technique (ICA) in a continuous wave (cw) multimode dye laser has been applied to the study of the molecular spectrum of D{sub 2} in the optical region (6185.28-5797.37 {angstrom}). This work represents the first attempt to directly observe the optical absorption spectrum of D{sub 2} whereas only the emission spectrum in the region was previously available. In the course of an extensive analysis of our data, new transition assignments were given to lines that were not previously observed in emission. Furthermore, some wrong assignments that existed in the previously published literature have been corrected. Besides the expected transitions originating from the 2c{sup {minus}} state ({tau}: 10{sup {minus}3}s), transitions from very short lived states such as 2a, 2c{sup +}, 2C{sup {plus minus}}, 2B ({tau}: 10{sup {minus}8} {yields} 10{sup {minus}9}s) were also observed, which shows ICA to be highly sensitive to detection of very weak absorption lines. In the second part of this research project the proportionality of the ICA signal to number density has been used to investigate the collisional quenching of the 2c{sup 3}{Phi}{sub u} state of H{sub 2} by H{sub 2}, N{sub 2} Ar, Ne, and He over various vibrational and rotational levels. The study was carried out in an rf (radio frequency) produced plasma containing mixtures of the various gases.},
doi = {},
url = {https://www.osti.gov/biblio/5469196}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Thesis/Dissertation:
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