D Nemirovsky et al 1999 J. Phys.: Condens. Matter 11 6653 doi:10.1088/0953-8984/11/35/303
Anomalous kinetic energies of adsorbed 4He on active carbon fibre (ACF)
D Nemirovsky
, R Moreh, K H Andersen
and J Mayers§
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 K and 10.2 K and the average kinetic energy Ks was found: 54.3±3.0 K. 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.
- PACS
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68.03.Fg Evaporation and condensation of liquids
78.70.-g Interactions of particles and radiation with matter
- Subjects
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Soft matter, liquids and polymers
- Dates
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Issue 35 (6 September 1999)
Received 7 April 1999
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Anomalous kinetic energies of adsorbed 4He on active carbon fibre (ACF)
D Nemirovsky et al 1999 J. Phys.: Condens. Matter 11 6653
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