0185432 - UJF-V 20010159 RIV NL eng J - Journal Article
Farhi, E. - Fak, B. - Zeyen, C. M. E. - Kulda, Jiří
Roton lifetime measurement in superfluid He4 using the spin-echo option on the IN20 triple-axis spectrometer.
Physica B-Condensed Matter. Roč. 297, 1/4 (2001), s. 32-36. ISSN 0921-4526. E-ISSN 1873-2135
Institutional research plan: CEZ:AV0Z1048901
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 0.663, year: 2001

High-resolution measurements of the temperature dependence of the roton lifetime and energy shift in superfluid He4 have been performed using the IN20 thermal neutron triple-axis spectrometer spill-echo option (TASSE). This experiment constitutes the first implementation of the spin-echo technique for inelastic neutron scattering measurements on IN20 using the optimized field-shape superconducting presission coils. An energy resolution of 0.7 mu eV was achieved and the results are in agreement with previous studies.
Permanent Link: http://hdl.handle.net/11104/0081828