Access the full text.
Sign up today, get DeepDyve free for 14 days.
M. Gibbs, P. Sokol, W. Stirling, R. Azuah, M. Adams (1997)
The collective excitations of superfluid4He in aerogel glassJournal of Low Temperature Physics, 107
Andersen, Bossy, Cook, Randl, Ragazzoni (1996)
High-Resolution Measurements of Rotons in 4He.Physical review letters, 77 19
R. Donnelly, J. Donnelly, R. Hills (1981)
Specific heat and dispersion curve for helium IIJournal of Low Temperature Physics, 44
K. Bedell, D. Pines, A. Zawadowski (1984)
Pseudopotential theory of interacting roton pairs in superfluid /sup 4/HePhysical Review B, 29
J. Pearce, R. Azuah, W. Stirling, R. Dimeo, P. Sokol, M. Adams (2000)
High-resolution measurements of the temperature dependence of the roton energy of superfluid 4HePhysica B-condensed Matter, 276
New measurements of the roton excitations in superfluid 4He have been made using the IRIS spectrometer (energy resolution ∼20 μeV at the roton energy) at the ISIS spallation neutron source. The roton energy was determined over a temperature range of 0.56 to 1.61 K. High resolution (energy resolution <1 μeV) neutron inelastic scattering measurements by Andersen et al.2 of the dependence of the 4He roton energy on temperature have shown significant deviations from the expected behaviour; the temperature variation was found to be discontinuous and slower than predicted by the established roton-roton interaction theory due to Bedell, Pines and Zawadowski (BPZ). 3 We find that our results can be described well by the BPZ theory over this temperature range and we do not observe the anomalous behaviour reported by Andersen et al. We offer some explanations as to the origin of this apparent disagreement.
Journal of Low Temperature Physics – Springer Journals
Published: Oct 8, 2004
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.