Lifetime of roton in liquid helium

Journal Article · Wed Sep 20 04:00:00 EDT 1978 · JETP Lett. (USSR) (Engl. Transl.); (United States)

OSTI ID:6285240

Blagoveshchenskii, N M; Dokukin, E B

The temperature dependence of the lifetime and energy of the roton was investigated by the method of inelastic scattering of neutrons. It follows from the results that the elementary theory of the roton lifetime in superfluid He/sup 4/ does not explain satisfactorily the GAMMA (T) dependence, and calls for invoking additional broadening mechanisms. Strong damping of the roton at the lambda point was experimentally demonstrated.

• Research Organization: Institute of High Pressure Physics, USSR Academy of Sciences
• OSTI ID: 6285240
• Journal Information: JETP Lett. (USSR) (Engl. Transl.); (United States), Journal Name: JETP Lett. (USSR) (Engl. Transl.); (United States) Vol. 28:6; ISSN JTPLA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COHERENT SCATTERING
DIFFRACTION
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LAMBDA POINT
LIFETIME
LIGHT NUCLEI
NEUTRON DIFFRACTION
NUCLEI
PHYSICAL PROPERTIES
QUANTUM FLUIDS
QUASI PARTICLES
ROTONS
SCATTERING
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE