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dc.creatorHong, X.en_US
dc.creatorMiller, Terry A.en_US
dc.date.accessioned2007-11-20T17:10:19Z
dc.date.available2007-11-20T17:10:19Z
dc.date.issued1995en_US
dc.identifier1995-RJ-01en_US
dc.identifier.urihttp://hdl.handle.net/1811/29685
dc.descriptionAuthor Institution: The Ohio State University, Columbus, OH 43210en_US
dc.description.abstractPolarity-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.extent54568 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleOBSERVATION OF CHARACTERISTIC, POLARITY-DEPENDENT, DOPPLER SHIFTS FOR NEUTRAL SPECIES IN THE POSITIVE COLUMN OF A DISCHARGE PLASMAen_US
dc.typearticleen_US


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