Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.704691
Title: An NMR study of adsorbed helium films
Author: Kent, Anthony Joseph
Awarding Body: University of London
Current Institution: Royal Holloway, University of London
Date of Award: 1985
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Abstract:
The properties of sub-monolayer Helium-3 films adsorbed on two totally different but planar substrates, Mylar film and exfoliated graphite have been studied using NMR. The nuclear magnetic relaxation times T1 and T 2 have been measured as functions of fractional monolayer completion, temperature, substrate plane orientation and Larmor frequency using a specially designed and constructed NMR spectrometer system. The results obtained with a Mylar film substrate are consistent3with the formation of patches of solid 3He at regions of preferential adsorption on the substrate. Measurements of T2 m very low coverage 3He films on exfoliated graphite also indicate that the adsorbate forms areas of relatively high density solid, in agreement with the thermodynamic analysis of Elgin and Goodstein. Finally, detailed measurements of T2 as a function of all of the above parameters at low areal densities will help us to characterise the relaxation processes for the fluid phase of 33He on exfoliated graphite. Mylar is the tradename of poly(ethelene-terephthalate) film, marketed by Du Pont.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.704691  DOI: Not available
Keywords: Low Temperature Physics
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