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Experimental Measurement of Weak Band Intensities

Published online by Cambridge University Press:  12 April 2016

Kevin K. Lehmann  and
Daniele Romanini
Kevin K. Lehmann
Affiliation:
Department of Chemistry, Princeton University, Princeton NJ 08544, USA
Daniele Romanini
Affiliation:
Department of Chemistry, Princeton University, Princeton NJ 08544, USA

Extract

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In modeling the opacity of astronomical objects, such as stellar atmospheres, the most important transitions are those with absorbance = αL ∼ 1, where α is the absorption coefficient of the atmosphere and L is the pathlength that light travels in leaving the atmosphere. Transitions with much smaller absorbance are not important, while those with much larger absorbance are effectively opaque. The relevant absorption lengths L are typically orders of magnitude larger than can be realized in the laboratory, and thus obtaining the needed laboratory data is a significant experimental challenge. This volume contains several examples of the power of modern ab initio methods to predict spectra of simple triatomic molecules, such as H2O, but it is still necessary to at least calibrate the predictions against laboratory bands of similar oscillator strength. The theoretical treatment of molecules with four or more atoms lags far behind the theoretical treatment of triatomics and present experimental capabilities.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 146: Molecules in the Stellar Environment , 1994 , pp. 366 - 375
Copyright
Copyright © Springer-Verlag 1994

References

Botschwina, P., 1988, J. Chem. Soc. Faraday Trans. 2, 84, 1263 Google Scholar
Botschwina, P., 1992, private communicationGoogle Scholar
Botschwina, P., Seeger, S., Horn, M., Fluegge, J., Oswald, M., Mladenowic, M., Hoeper, ‘U., Oswald, R., Schick, E., 1993, Proceedings of the 50'th international meeting of the Division de Chimie Physique de la Societě Française de Chimie (Mont Sainte-Odilie), to be published with the American Institute of Physics.Google Scholar
Burberry, M.S., Morrell, J.A., Albrecht, A.C., Swofford, R.L., 1979, J. Chem. Phys., 70, 5522 Google Scholar
Carter, S., Handy, N.C., Mills, I.M., 1993, J. Chem. Phys., 99, 4379 Google Scholar
Davidsson, J., Gutow, J.H., Zare, R.N., 1990, J. Phy. Chem., 94, 4069 Google Scholar
Fairbanks, W.M., Hänsch, T.W., Schawlow, A.L., 1975, J. Opt. Soc. Am., 65, 199 Google Scholar
Giver, L.P., 1978, J. Quant. Spectrosc. Radiât. Transfer, 19, 311 Google Scholar
Herriott, D.R., Kogelnik, H., Kompfner, R., 1964, Appi. Opt., 3, 523 Google Scholar
Herzberg, G., 1945, Infrared and Raman Spectra of Polyatomic Molecule, Van NostrandGoogle Scholar
Kritchman, E., Shtrikman, S., Slatkine, M., 1978, J. Opt. Soc. Am., 68, 1257 Google Scholar
Lovas, F.J., Suenram, , Ogata, T., Yamanoto, S., 1992, Astrophys. J., 399, 325 Google Scholar
O'Keefe, A., Deacon, D.A.G., 1988, Rev. Sei. Instrum., 59, 2544 Google Scholar
O'Keefe, A., Scherer, J.J., Cooksy, A.L., Sheeks, R., Heath, J., Saykally, R.J., 1990, Chem. Phys. Lett., 172, 214 Google Scholar
Powers, D.E., Hansen, S.G., Geusic, M.E., Puiu, A.C., Hopkins, J.B., Dietz, T.G., Duncan, M.A., Langridge-Smith, P.R.R., Smalley, R.E., 1982, J. Phys. Chem., 78, 1627 Google Scholar
Rempe, G., Thompson, R.J., Kimble, H.J., Lalezari, R., 1992, Optics. Letters, 17, 363 Google Scholar
Romanini, D., Lehmann, K.K., 1993, J. Chem. Phys., 99, 6287 CrossRefGoogle Scholar
Smith, A.M., Lehmann, K.K., Klemperer, K., 1986, J. Chem. Phys., 85, 4958 Google Scholar
Smith, A.M., Jørgensen, U.G., Lehmann, K.K., 1987, J. Chem. Phys., 87, 3034 Google Scholar
Smith, A.M., Coy, S.L., Klemperer, K., Lehmann, K.K., 1989, J. Mol. Spectrosc., 134, 134 Google Scholar
Smith, I.W.M., 1981, J. Chem. Soc. Faraday Trans. 2, 77, 2357 Google Scholar
Stoeckel, F., Atkinson, G.H., 1985, Appi. Optics., 24, 3591 Google Scholar
Stoeckel, F., Melieres, M.-A., Chenevier, M., 1982, J. Chem. Phys., 76, 2191 Google Scholar
Welsh, H.L., Cummìning, C., Stansbury, E.J., 1951, J. Opt. Soc. Am., 41, 712 Google Scholar
White, J.U., 1942, J. Opt. Soc. Amer., 32, 285 Google Scholar
Yariv, A., 1989, Quantum Electronic, Wiley and SonsGoogle Scholar