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Search for single-roton emission from negative ions in He II.

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>1981
<mark>Journal</mark>Physica B: Condensed Matter
Number of pages2
<mark>Original language</mark>English


We describe an experiment to search for evidence of single-roton emission from negative ions in Hell. Preliminary results are presented, enabling an upper bound of 3 x 10^-3 to be placed on the ratio of the single/pair emission rate constants. We draw attention to the urgent need for more accurate measurements of the Landau parameters at low temperatures close to the melting pressure.

Bibliographic note

Proceedings of the 16th International Conference on Low Temperature Physics, Los Angeles, 19-25 August 1981.