Infrared Spectrograph

The Infrared Spectrograph (IRS) provided crucial data to characterize the mid-infrared rise in the spectral energy distribution of transition disks, which bear... 

IRS Infrared Spectrograph, the spectrograph on board the Spitzer Space Telescope. The instrument had a low- and high-resolution mode, providing sensitive spectra from 5 to 40 pm. 

The initial rate of appearance of N 02 is given by fcifN Os), where is the mole fraction of in the N2O6 (the N 02 was followed spectrophotometrically in the infrared). At 27 C in the presence of about 500 mm Hg of CO2, h was about 0.5 sec compared to a rate constant of about 4 X 10 sec" for the over-all decomposition. At 50 mm Hg of CO2, ki was about 0.1 sec Such rapid rates are obviously difficult to study with the relatively slowly responding infrared spectrograph, and so the data are only semiquantitative. 

R. P. Madden and W. S. Benedict from a high resolution infrared spectrograph. 

Figure 13.1 Schematic representation of the optical layout of a planar array infrared spectrograph.

L. C. Roess and E. N. Dacus, Design and Construction of Rapid-Response Thermocouples for Use as Radiation Detectors in Infrared Spectrographs, Rev. Sci. Instr. 16, 164, 1945. 

Pellerin, C., Snively, C.M., Chase, D.B. and Rabolt, J.F. (2004) Performance and application of a new planar array infrared spectrograph operating in the mid-infrared (2000-975cm" ) fingerprint region. Appl. Spectrosc., 58, 639-646. 

Pellerin C, Frisk S, Rabolt JF, Chase DB. A faster approach to infrared rheo-optics using a planar array infrared spectrograph. Appl Spectrosc 2004 58 799-803. 

The InfraRed Spectrograph (IRS) provides the primary spectroscopic capability for SIRTF. It covers the wavelength range of 5.3 to 40.0 /xm with low-resolution (7 = 60-120) spectroscopy and the range between 10 and 37 /txm at higher resolution R = 600). IRS utilizes 128 X 128 Si As and Si Sb BIB arrays to cover its wavelength region. 

Three specific classes of dispersive infrared spectrographs are now feasible ... 

Cabannes-Ott, C., 1960. The structure of several metal oxyhydrates by thermogravimetric and infrared spectrographic methods. Ann. Chim. (Paris) 5 905. 

Gonzalez Garcia, S., 1960. Infrared spectrographic and X-ray study of a clay formed of illite and attapulgite. Anales Real Soc. Espah. Fis. Quim. (Madrid) 56B 39. 

Orsini, L., and M. Petitjean, 1953. Infrared spectrographic study of boehmite and its dehydration products. Compt. Rend. IZl. yil. 

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