dc.creator Hong, X. en_US dc.creator Miller, Terry A. en_US dc.date.accessioned 2007-11-20T17:10:19Z dc.date.available 2007-11-20T17:10:19Z dc.date.issued 1995 en_US dc.identifier 1995-RJ-01 en_US dc.identifier.uri http://hdl.handle.net/1811/29685 dc.description Author Institution: The Ohio State University, Columbus, OH 43210 en_US dc.description.abstract Polarity-dependent, Doppler shifts of emissions from neutral species have been observed for the firsttime in a positive column of a DC discharge. We have studied discharge emissions from $H_{2}$ and its isotopomers using a Fourier-transform spectrometer. Experimental evidence supports the hypothesis that the polarity-dependent, Doppler shifts observed for emission lines derive from momentum transferred during the electron-molecule collisions that produce the excited emissive states. We have formulated a theoretical model to relate Doppler shifts to the drift velocity of electrons in discharge. Predictions based on the model are consistent with the experimental observations. For example, we have found experimentally that the Doppler shift of emission from a triplet state is typically larger than that from a singlet state. This result can be interpreted quantitatively in terms of a model which predicts different momentun transfer for singlet-singlet and singlet-triplet electron-molecule excition collisions. en_US dc.format.extent 54568 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title OBSERVATION OF CHARACTERISTIC, POLARITY-DEPENDENT, DOPPLER SHIFTS FOR NEUTRAL SPECIES IN THE POSITIVE COLUMN OF A DISCHARGE PLASMA en_US dc.type article en_US
﻿

### Files in this item

Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.