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IEEE Sensors Journal
Different gases have been successfully fingerprinted on the basis of the distinct transition frequencies measured by frequency tuning a THz source developed by us. Our further analysis illustrates that one can reliably separate isotopologues by measuring and comparing their rotational constants. Based on our investigation of the N 2 O isotopologues, 29 rotational transition peaks were identified for the first time. For the gas mixtures, preliminary results indicate that one can identify thedoi:10.1109/jsen.2009.2038568 fatcat:mjdnl64n5rc6pfhldqtklrhrjq