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Comment on "K. Hansen, Int. J. Mass Spectrom. 399-400 (2016)51"

Authors Leif Holmlid
Publication year 2016
Published at Department of Chemistry and Molecular Biology
Language en
Subject categories Molecular physics, Chemical physics, Spectroscopy


The comment by K. Hansen suggests that the time-of-flight mass spectrometry data in one table in our paper from 2103 in IJMS should be due to a proton contamination and correspond to protons p instead of deuterons D. The evidence for such a suggestion is a re-plotting of our data, giving a bond distance of 5.0 pm instead of 2.3 pm, corresponding to state s = 3 instead of s = 2 in the ultra-dense hydrogen. However, protium has indeed been studied on the next pages in our paper, giving shorter time-of-flights as expected. A replotting of our protium results as suggested by Hansen gives a best fit mass of 0.6 u, showing that the suggested procedure gives consistently too small mass. Hansen also rejects the rotational energy transfer model as due to our use of D in the analysis of the data. However, this model has been applied successfully in two previous publications, including experiments using protium. Hansen also suggests that the protium is due to a contamination of the source; however, the gas feed (H2 or D2) and its result is well controlled and monitored. The most likely source of protons was instead laser-induced nuclear fusion, but the laser intensity in these experiments was a factor three too low to give strong fusion. Thus, the suggestion by Hansen is not valid.

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