Zobrazeno 1 - 10
of 573
pro vyhledávání: '"R. O. Simmons"'
Publikováno v:
physica status solidi (b). 241:284-291
A first measurement of the dynamic diffuse scattering (DDS) of X-rays was made in a fcc 4He crystal. The generally preferred method of studying lattice dynamics is through inelastic neutron scattering (INS). INS experiments, however, require large cr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::283f5ba03c22330930e807c7ce8f5f37
https://doi.org/10.1002/pssb.200301925
https://doi.org/10.1002/pssb.200301925
Publikováno v:
Physica B: Condensed Matter. :412-415
The technique of inelastic X-ray spectroscopy with energy resolution in the meV regime matured with the high photon flux of the third generation synchrotrons of these days. The progress is demonstrated with the phonon dispersion curves of single crys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::267613f50cd78bec1bbf4664fd4abd77
https://doi.org/10.1016/s0921-4526(98)01399-4
https://doi.org/10.1016/s0921-4526(98)01399-4
Publikováno v:
The Journal of Chemical Physics. 110:1650-1661
Neutron Compton profiles were measured of atomic momentum distributions in solid hexafluoroethane (C2F6) at saturated vapor pressure from 20 to 170 K, and of the liquid phase at 180 K. There are conflicting reports in the literature, from different k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80468e55a44e79a044981c2bc6cd46bb
https://doi.org/10.1063/1.477806
https://doi.org/10.1063/1.477806
Publikováno v:
Journal of Physics: Condensed Matter. 11:3501-3511
We present the first measurement of the coherent dynamic structure factor S(Q,) of solid 3He. At a density of 13.25(10) cm3 mol-1, we observed longitudinal phonons, using high-resolution inelastic x-ray scattering at momentum transfers 6 nm-1 < |Q| <
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ecf3ec89983769d1dcae75c64d4b78c
https://doi.org/10.1088/0953-8984/11/17/308
https://doi.org/10.1088/0953-8984/11/17/308
Publikováno v:
Journal of Physics: Condensed Matter. 8:6665-6684
Direct measurements are reported of the kinetic energies of FCC neon at seven temperatures between 4.25 and 20.2 K. The measurements employed the electronvolt spectrometer which is the neutron scattering instrument at the ISIS neutron source, UK. Wav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8435755a10ab908e57cbe0e0a1af5da5
https://doi.org/10.1088/0953-8984/8/36/018
https://doi.org/10.1088/0953-8984/8/36/018
Publikováno v:
Physical Review Letters. 77:115-118
We report new path-integral calculations and measurements of the kinetic energy of condensed helium and construct an overall dependence of kinetic energy on temperature for densities less than 70 atoms ${\mathrm{nm}}^{\ensuremath{-}3}$. In the solid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f5b03ec388c8afb9d010001369726dd
https://doi.org/10.1103/physrevlett.77.115
https://doi.org/10.1103/physrevlett.77.115
Publikováno v:
Physical Review Letters. 74:2535-2538
The dynamic structure factor $S(\stackrel{\ensuremath{\rightarrow}}{q},\ensuremath{\omega})$ of electrons in solid ${}^{4}$He was measured with 1.6 eV energy resolution by means of inelastic scattering of synchrotron x rays from a hcp single crystal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a96679839a965c1dc47607f7dec4cc30
https://doi.org/10.1103/physrevlett.74.2535
https://doi.org/10.1103/physrevlett.74.2535
Publikováno v:
Zeitschrift für Naturforschung A. 48:438-442
Using deep inelastic neutron scattering, direct measurements have been made, i) of the dynamic structure factor of a series of condensed argon samples over the temperature range 18 to 85 K, near melting (for wave-vector transfers 12 to 26 Ä -1) and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5c203d01f125b8b977210a21025bfaa
https://doi.org/10.1515/zna-1993-1-273
https://doi.org/10.1515/zna-1993-1-273
Publikováno v:
Zeitschrift für Naturforschung A. 48:433-437
Deep inelastic neutron scattering has been used to measure the neutron Compton profile (NCP) of a series of condensed 4He samples at densities from 28.8 atoms/nm3 (essentially the minimum possible density in the solid phase) up to 39.8 atoms/nm3 usin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f43552d455f78658ba89d4c419c3fd7
https://doi.org/10.1515/zna-1993-1-272
https://doi.org/10.1515/zna-1993-1-272
Publikováno v:
Physical Review B. 45:9671-9679
High-energy neutron-scattering experiments are reported on three samples of liquid natural neon. One was at 25.8 K at low pressure and two near 35 K were pressurized to densities differing by 9%. Measurements were made at wave-vector transfers Q in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0850b948d464cfc292efefdf984d1f3f
https://doi.org/10.1103/physrevb.45.9671
https://doi.org/10.1103/physrevb.45.9671