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Betz, A. L.; Johnson, M. A.; McLaren, R. A.; Sutton, E. C. |
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Title |
Heterodyne detection of CO2 emission lines and wind velocities in the atmosphere of Venus |
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Journal Article |
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Year |
1976 |
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Astrophys. J. |
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208 |
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L141-L144 |
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Keywords |
carbon dioxide, emission spectra, optical heterodyning, planetary radiation, venus atmosphere, wind velocity, doppler effect, infrared radiation, ultraviolet radiation, venus clouds |
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455 |
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Author |
Масленников, Сергей Николаевич |
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Title |
Смесители на эффекте электронного разогрева для терагерцового и инфракрасного диапазонов |
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Manuscript |
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2007 |
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М. МПГУ |
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HEB, detector, mixer, terahertz, THz, infrared, IR, direct detection effect, conversion loss |
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Ph.D. thesis |
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Russian |
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481 |
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Soifer, B. T.; Pipher, J. L. |
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Title |
Instrumentation for infrared astronomy |
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1978 |
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Annual Rev. Astron. Astrophys. |
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16 |
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1 |
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335-369 |
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infrared applications |
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0066-4146 |
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492 |
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Thiébeau, C.; Courtois, D.; Delahaigue, A.; Corre, H.; Mouanda, J. C.; Fayt, A. |
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Dual-beam laser heterodyne spectrometer: Ethylene absorption spectrum in the 10 μm range |
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Journal Article |
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1988 |
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Applied Physics B: Photophysics and Laser Chemistry |
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Appl. Phys. B |
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47 |
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4 |
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313-318 |
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infrared applications |
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0721-7269 |
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493 |
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Parrott, Edward P. J.; Zeitler, J. Axel; Fris<cc><152>c<cc><152>ic<cc><81>, Tomislav; Pepper, Michael; Jones, William; Day, Graeme M.; Gladden, Lynn F. |
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Title |
Testing the sensitivity of terahertz spectroscopy to changes in molecular and supramolecular structure: a study of structurally similar cocrystals |
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Journal Article |
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2009 |
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Crystal Growth & Design |
Abbreviated Journal |
Crystal Growth & Design |
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9 |
Issue |
3 |
Pages |
1452-1460 |
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supramolecular recognition, infrared, terahertz, IR, THz, TDS |
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Abstract |
Terahertz time-domain-spectroscopy (THz-TDS) has emerged as a versatile spectroscopic technique, and an alternative to powder X-ray diffraction in the characterization of molecular crystals. We tested the ability of terahertz spectroscopy to distinguish between chiral and racemic hydrogen-bonded cocrystals that are similar in molecular and supramolecular structure. Terahertz spectroscopy readily distinguished between the isostructural cocrystals of theophylline with chiral and racemic forms of malic acid which are almost identical in molecular structure and supramolecular architecture. Similarly, the cocrystals of theophylline with chiral and racemic forms of tartaric acid, which are similar at the molecular level but dissimilar in crystal packing, were distinguished unequivocally. The investigation of the same cocrystals using X-ray powder diffraction and Raman spectroscopy suggested that THz-TDS is comparable in sensitivity to diffraction methods and more sensitive than Raman spectroscopy to changes in cocrystal architecture. The differences in spectra acquired by THz-TDS could be further enhanced by cooling the samples to 109 K. |
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1528-7483 |
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567 |
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