Anomalous kinetic energies of adsorbed 4He on active carbon fibre (ACF)

D. Nemirovsky, R. Moreh, K. H. Andersen, J. Mayers

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Direct measurements of the kinetic energies of He atoms adsorbed on active carbon fibre (ACF), at submonolayer coverage, are reported. The electronvolt spectrometer (eVs) of the ISIS neutron source, that utilizes the neutron Compton scattering technique, was employed. The specific adsorption area of the ACF was 3000 m2 g-1. The momentum distribution of adsorbed helium was measured at 4.6 Kand 10.2 K and theaverage kinetic energy Ks was found: 54.3±3.0K. This value is 30% higher than that estimated by assuming slit-shaped pores of dimensions ∼0.7 nm together with a nearly monolayer coverage on a graphitic type adsorber.

Original languageEnglish
Pages (from-to)6653-6660
Number of pages8
JournalJournal of Physics Condensed Matter
Issue number35
StatePublished - 6 Sep 1999

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics


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