  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.
