Zobrazeno 1 - 10
of 20
pro vyhledávání: '"E. Iolin"'
Publikováno v:
Physical Review B. 94
The damping $(\mathrm{\ensuremath{\Gamma}}a)$ of the transverse acoustic (TA) phonon in single crystals of the relaxor $\mathrm{KT}{\mathrm{a}}_{1\ensuremath{-}x}\mathrm{N}{\mathrm{b}}_{x}{\mathrm{O}}_{3}$ with $x=0.15--0.17$ was studied by means of
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 529:152-156
It is calculated that simultaneous ultrasonic excitation of the Bonse–Hart monochromator and analyzer leads to the improvement of resolution and increasing of the intensity. It is argued that incoherent ultrasonic field is applicable in similar exp
Existence of quasi-stationary neutron and x-ray states near the surface of a deformed single crystal
Autor:
L Rusevich, E Iolin
Publikováno v:
Journal of Physics D: Applied Physics. 32:A92-A96
The problem of x-ray or neutron multiply internally reflected inside a bent single crystal plate (Bragg geometry) is considered. It is found that such multiple reflections lead to the existence of quasi-stationary (QS) states. QS states are discrete
Publikováno v:
Neutron News. 10:24-27
The name “neutron camel” is connected with an unusual profile of the back-face rocking curve (BFRC) discovered at the Bonse-Hart neutron double-crystal diffractometer, Oak Ridge National Laboratory (ORNL) 11. At that time, effort was focused on t
Publikováno v:
Applied Physics A: Materials Science & Processing. 74:s1686-s1688
The recently discovered dynamical diffraction effect ‘neutron camel’ was used for residual stress measurements in a thick Si (111) crystal coated with a 2000 A-thick Ni film. The observed asymmetry of the back-face rocking curve corresponds to th
Publikováno v:
Physica B: Condensed Matter. :1213-1215
We have observed, for the first time, inelastic neutron scattering from the phonons externally excited in single crystals. We have used ultrasonic transducers (50–200 MHz) for the excitation and neutron spin-echo spectroscopy for observing acoustic
Publikováno v:
SPIE Proceedings.
Neutron scattering from ultrasonic waves in silicon and KBr single crystals was studied. By the use of neutron spin echo spectroscopy we have observed ultrasonic phonons for the first time by inelastic neutron scattering. One, double and zero phonon
Publikováno v:
Acta Crystallographica Section A Foundations of Crystallography. 52:C499-C499
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