Clustering of molecular hydrogen in fused silica

Graebner, J. E.; Lemaire, P. J.; Allen, L. C.; Haemmerle, W. H.
May 1985
Applied Physics Letters;5/1/1985, Vol. 46 Issue 9, p839
Academic Journal
Molecular hydrogen H[sub 2] in glass optical fibers has been detected calorimetrically at the 50 ppm level by monitoring the ortho-para conversion of H[sub 2] at low temperatures (T < 1 K). The number of H[sub 2] molecules is determined and information about the local configuration can be inferred. It is concluded that the majority of the H[sub 2] is located in strings or very small clusters of two or three molecules each, rather than being uniformly distributed as isolated molecules.


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