| 释义 |
roton Physics.|ˈrəʊtɒn|
[f. rotation + -on1.]
A quantum or quasiparticle associated with vortical motion in a liquid, esp. in liquid helium.
1941L. Landau in Jrnl. Physics U.S.S.R. V. 75/2 An ‘elementary excitation’ of the vortex spectrum might be called a ‘roton’. [Note] This name was suggested by I. E. Tamm. 1947Physical Rev. LXXII. 852/1 In Landau's theory, the excited atoms of the Bose-Einstein theory are replaced by ‘rotons’. 1968New Scientist 25 July 198/3 The evaporation of helium atoms due to the decay of ‘rotons’, the elementary rotational excitations of liquid helium. 1973Nature 9 Nov. 66/1 A new type of elementary excitation, christened the 3He roton, may exist in liquid 3He–4He mixtures. 1977New Scientist 3 Mar. 507/1 The physical nature of the roton still remains a mystery some thirty years after their existence was first postulated by Landau, although they have been detected in numerous experiments. |