The excitation dispersion in quantum liquid, namely superfluid <$E nothing sup 4 roman He>, has been investigated. An attempt was made to systemize literature experimental data, pointing to different origins of excitations with wave vectors, corresponding to different intervals of the dispersion curve for liquid <$E nothing sup 4 roman He>. The neutron spectroscopy data are analyzed from the point of view of a certain physical hypothesis of the formation of this spectrum. The hypothesis permits us to explain most of the available experimental data. Special attention is concentrated on comparing the experimental data obtained with a DIN-2PI time-of-flight spectrometer (IBR-2 reactor, Dubna) and the results of foreign centers.

• Пучков Олександр Васильович (1954–) (біологічні науки)

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