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Determination of the relative line strengths of the A^2A' ← X^2A" and (200)←(000) transitions of HO_2


Rosario-Ortiz, Fernando L. (2002) Determination of the relative line strengths of the A^2A' ← X^2A" and (200)←(000) transitions of HO_2. Master's thesis, California Institute of Technology.


The hydroperoxyl radical (HO_2) has been one of the most studied triatomic radicals during the past few decades. Its roles in atmospheric chemistry through the HO_x cycle as well as in processes such as combustion have made the study of this radical extremely important. In the past three decades the interest in the spectroscopy of this molecule has increased due in part by the need of detecting this radical in several different environments. Although its UV, mid- and far-IR transitions have been studied extensively, its near-IR transitions have not received much attention until recently. Among the transitions observed in this region, the A^2 A' ← X^2 A" first electronic transition and the (200)←(000) first OH overtone transition are two of the most important. These bands offer many advantages for detection of HO_2 in kinetic experiments and possibly in situ. Due to the importance of these two bands, information on their intensity is needed to measure accurately the concentration of HO_2. An apparatus has been constructed to measure the line strengths of the A ← X electronic transition at 1.43 µm and the (200)←(000) first OH overtone transition at 1.51 µm by diode laser absorption spectroscopy.

Item Type:Thesis (Master's thesis)
Subject Keywords:Chemistry
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Thesis Availability:Restricted to Caltech community only
Research Advisor(s):
  • Okumura, Mitchio (advisor)
  • Sander, Stanley P. (co-advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:28 September 2001
Record Number:CaltechTHESIS:02022012-093757351
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6804
Deposited By: Benjamin Perez
Deposited On:02 Feb 2012 17:59
Last Modified:26 Dec 2012 04:40

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