High-Resolution Direct-Absorption Spectroscopy of Hydroxymethyl Radical in the CH Symmetric Stretching Region

2013 ◽  
Vol 117 (32) ◽  
pp. 7042-7049 ◽  
Author(s):  
Melanie A. Roberts ◽  
Erin N. Sharp-Williams ◽  
David J. Nesbitt
Keyword(s):  
High Resolution ◽  
Absorption Spectroscopy ◽  
Direct Absorption ◽  
Direct Absorption Spectroscopy ◽  
Hydroxymethyl Radical

A constant intensity technique to improve the performances of devices based on direct absorption spectroscopy

2015 ◽  
Vol 23 (1) ◽  
Author(s):  
A. Montori ◽  
M. De Pas ◽  
M. Giuntini ◽  
M. Siciliani De Cumis ◽  
S. Viciani ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Direct Absorption ◽  
Background Signal ◽  
Constant Intensity ◽  
Gas Concentration ◽  
Direct Absorption Spectroscopy ◽  
Frequency Scan ◽  
Time Observation ◽  
Detection Processing ◽  
Real Time Observation

Abstract We describe an all−in−fibre apparatus for Constant Intensity Direct Absorption Spectroscopy (CIDAS) for gas concentration measurements which keeps the power of a diode laser constant along the frequency sweep. The reduction of the large variation of the laser power, connected to the frequency scan, enhances the ability of detecting small variations in a background signal, resulting in an increase of the sensitivity with respect to standard direct absorption techniques. Moreover, CIDAS allows for a real−time observation of the absorption signals without any kind of post−detection processing. The apparatus has been tested with carbon dioxide (CO

Direct absorption spectroscopy of water clusters formed in a continuous slit nozzle expansion

2009 ◽  
Vol 131 (20) ◽  
pp. 204312 ◽  
Author(s):  
A. Moudens ◽  
R. Georges ◽  
M. Goubet ◽  
J. Makarewicz ◽  
S. E. Lokshtanov ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Water Clusters ◽  
Direct Absorption ◽  
Direct Absorption Spectroscopy
Sign in / Sign up

Export Citation Format

Share Document