2-BRANCH STRUCTURE OF THE SPECTRUM OF ELEMENTARY EXCITATIONS OF SUPERFLUID HE-4

Authors
BLAGOVESHCHENSKII NM BOGOYAVLENSKII IV KARNATSEVICH LV KOZLOV ZA KOLOBRODOV VG PUCHKOV AV SKOMOROKHOV AN
Citation
Nm. Blagoveshchenskii et al., 2-BRANCH STRUCTURE OF THE SPECTRUM OF ELEMENTARY EXCITATIONS OF SUPERFLUID HE-4, JETP letters, 57(7), 1993, pp. 428-432
Citations number
5
Categorie Soggetti
Physics
Journal title
JETP letters → ACNP
ISSN journal
00213640
Volume
57
Issue
7
Year of publication
1993
Pages
428 - 432
Database
ISI
SICI code
0021-3640(1993)57:7<428:2SOTSO>2.0.ZU;2-D
Abstract
The spectrum of elementary excitations of Hell at wave vectors q almos t-equal-to 0.1-1.9 angstrom-1 has been studied by a neutron-scattering method at temperatures T = 0.42-1.72 K. At q greater-than-or-equal-to q0(T) almost-equal-to 0.48 angstrom-1 and under the condition epsilon greater-than-or-equal-to DELTA, the spectrum has a two-branch structu re.