Bau einer heizbaren Ultraschalldüse zur mikrowellenspektroskopischen Untersuchung schwerflüchtiger Substanzen im Molekularstrahl

Within the scope of this work a new heatable molecular beam nozzle has been developed which is able to evaporate substances with low vapor pressure. With this nozzle low vapor pressure substances can be measured with the high resolution and high sensitivity of the molecular beam Fouriertransform microwave spectroscopy. Following molecules of the thiazole type have been studied: 4,5-dimethylthiazole, benzo[b]thiophene, benzothiazole and 2-methylbenzothiazole. For all these molecules the rotational spectra has been assigned for the first time. Apart from the rotational constants and the quartic centrifugal distortion constants for those molecules with internal rotors barrier to internal rotation could be determined. In the case of nitrogen containing molecules, the diagonal quadrupole coupling constants, in some cases also the off-diagonal elements, have been obtained.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2000

Author dc:creator

• Welzel, Alexandra

Contributors dc:contributor

• Stahl, Wolfgang

• info:eu-repo/classification/ddc/530
• Physik
• Strahldüse
• Molekularstrahl
• Thiazole
• Mikrowellenspektroskopie
• Fourier-Spektroskopie

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-121993%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:60272