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Microwave detection of molecules formed by shock wave induced reactions (1998)

Ewert, D. ; Grönig, H. ; Olivier, H. ; [et al.]

Springer

Shock waves 8 (1998), S. 385-388

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ISSN: 1432-2153

Keywords: Key words:Shock tube experiments, Formation of molecules, Microwave absorption technique

Source: Springer Online Journal Archives 1860-2000

Topics: Physics , Technology

Notes: Abstract. The paper describes experimental investigations in a shock tube concerning the formation of new molecules using He as a driver gas and a mixture of Kr, CH $_4$ and NH $_3$ as driven gas, where Kr serves as diluant. By microwave absorption technique it was possible to detect HCN, CH $_2$ O and CH $_3$ NH $_2$ as reaction products. Obviously, these molecules were formed in the plasma behind the shock wave. In addition, the “swan bands” of C $_2$ have been observed with optical methods.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s001930050132

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Infrared appearance of dynamical models for circumstellar dust shells around long-period variables (1995)

Winters, J. M. ; Fleischer, A. J. ; Sedlmayr, E. ; [et al.]

Springer

Astrophysics and space science 224 (1995), S. 329-332

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ISSN: 1572-946X

Keywords: hydrodynamics ; radiative transfer ; circumstellar shells ; carbon stars ; long-period variables ; dust ; stars: IRC +10216

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract Synthetic brightness profiles resulting from consistent dynamical models for circumstellar dust shells around long-period variables are presented and discussed with respect to a corresponding observation of IRC +10216.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00667866

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Ab initio thermodynamic properties for different isomers of the Al O molecule (1999)

Patzer, A.B.C. ; Chang, C. ; Sedlmayr, E. ; [et al.]

Springer

The European physical journal 6 (1999), S. 57-62

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ISSN: 1434-6079

Keywords: PACS. 33.15.-e Properties of molecules and molecular ions - 82.60.-s Chemical thermodynamics

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: We present ab initio thermodynamic properties for seven different geometric isomers of molecular Al2O3 over a wide temperature range. The rigid rotator-harmonic oscillator approximation is used to calculate the partition function as it is generally applied in thermodynamic studies of polyatomic molecules. The molecular data employed in setting up the partition functions are taken from the theoretical results of ab initio MP2/6-31G(d) calculations. An analysis of the effects of the various contributions is made. The resulting thermodynamic functions of Al2O3 are consistent with the JANAF thermochemical data compilation. Some thermochemical implications are discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100530050284

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