Hendry, P. C. and Lawson, N. S. and McClintock, Peter V. E. and Williams, C. D. H. and Bowley, R. M. (1988) Macroscopic quantum tunnelling of vortices in He II. Physical Review Letters, 60 (7). pp. 604-607. ISSN 1079-7114Full text not available from this repository.
Experimental evidence is presented showing that the creation of vortices in He II involves macroscopic quantum tunneling through, or thermal activation over, a potential-energy barrier E. The investigations, based on measurements of the rate at which negative ions create vortex rings in the isotopically pure superfluid within the temperature range 50 < T < 500 mK, have yielded a barrier height of E/kB = 3.1 ± 0.1 K, in excellent agreement with the theoretical value predicted by Muirhead, Vinen, and Donnelly.
|Journal or Publication Title:||Physical Review Letters|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
Faculty of Health and Medicine > Health Research
|Deposited By:||Professor P. V. E. McClintock|
|Deposited On:||23 Mar 2010 10:19|
|Last Modified:||26 Jul 2012 17:08|
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