Zobrazeno 1 - 10
of 580
pro vyhledávání: '"Alfred, Q."'
Autor:
Baron, Alfred Q. R.
Publikováno v:
Hamon Volume 34 Number 1 2024 p3
This paper reviews non-resonant meV-resolved inelastic x-ray scattering (IXS) as a complementary method to inelastic neutron scattering (INS). Two aspects of IXS that are notable in this context are (1) that IXS allows straightforward measurements of
Externí odkaz:
http://arxiv.org/abs/2406.08670
Autor:
Hosokawa, Shinya, Stellhorn, Jens R., Pusztai, Laszlo, Yamazaki, Yoshikatsu, Jiang, Jing, Kato, Hidemi, Ichitsubo, Tetsu, Magome, Eisuke, Blanc, Nils, Boudet, Nathalie, Ohara, Koji, Tsutsui, Satoshi, Uchiyama, Hiroshi, Baron, Alfred Q. R.
To experimentally clarify the changes in structural and dynamic heterogeneities in a metallic glass (MG), Gd65Co35, by rejuvenation with a temperature cycling (cryogenic rejuvenation), high-energy x-ray diffraction (HEXRD), anomalous x-ray scattering
Externí odkaz:
http://arxiv.org/abs/2311.04422
Autor:
Baron, Alfred Q. R., Ishikawa, Daisuke
Background rates in several pixel array detectors are investigated with an eye toward using them with hard, >6 keV, x-rays in very low-rate experiments - e.g. at signal rates <0.1/s/cm^2. Measured background event rates for a detector with an unshiel
Externí odkaz:
http://arxiv.org/abs/2210.10219
Autor:
Baron, Alfred Q. R., Ishikawa, Daisuke
Publikováno v:
SPring-8 Information, 27 (2022) 80-85
We describe how improvements in methodology and instrumentation for meV-resolved inelastic x-ray scattering (IXS), coupled with a fresh examination of older theory, allow identification of interaction between the quasi-elastic and acoustic dynamical
Externí odkaz:
http://arxiv.org/abs/2205.06472
Autor:
Sun, Peihao, Monaco, Giulio, Zalden, Peter, Sokolowski-Tinten, Klaus, Antonowicz, Jerzy, Sobierajski, Ryszard, Kajihara, Yukio, Baron, Alfred Q. R., Fuoss, Paul, Chuang, Andrew Chihpin, Park, Jun-Sang, Almer, Jonathan, Hastings, J. B.
Publikováno v:
PNAS 119(28), e2202044119 (2022)
Liquid polymorphism is an intriguing phenomenon which has been found in a few single-component systems, the most famous being water. By supercooling liquid Te to more than 130 K below its melting point and performing simultaneous small-angle and wide
Externí odkaz:
http://arxiv.org/abs/2201.06838
Autor:
Kajihara, Yukio, Inui, Masanori, Matsuda, Kazuhiro, Ishikawa, Daisuke, Tsutsui, Satoshi, Baron, Alfred Q. R.
Publikováno v:
Phys. Rev. Research 5, 013120 (2023)
We report a new experimental approach for observing mesoscopic fluctuations underlying the thermodynamic anomalies of ambient liquid water. In this approach, two sound velocity measurements with different frequencies, namely inelastic X-ray scatterin
Externí odkaz:
http://arxiv.org/abs/2111.06589
Autor:
Ishikawa, Daisuke, Baron, Alfred Q. R.
Publikováno v:
Journal of the Physical Society of Japan, Vol.90 (2021) No.8, Article ID: 083602
We investigate the presence of an acoustic-quasi-elastic interaction contribution in the IXS spectra of liquid water at 301K using inelastic x-ray scattering with sub-meV energy resolution at momentum transfers 0.77<=Q<=4.20 /nm. The contribution app
Externí odkaz:
http://arxiv.org/abs/2107.09827
Publikováno v:
The Journal of Physical Chemistry B 125(49), 13494-13501 (2021)
Despite the technological importance of supercritical fluids, controversy remains about the details of their microscopic dynamics. In this work, we study four supercritical fluid systems -- water, Si, Te, and Lennard-Jones fluid -- \emph{via} classic
Externí odkaz:
http://arxiv.org/abs/2104.07732
Autor:
Ikuta, Daijo, Ohtani, Eiji, Fukui, Hiroshi, Sakamaki, Tatsuya, Heid, Rolf, Ishikawa, Daisuke, Baron, Alfred Q. R.
Publikováno v:
Sci. Adv. 9, eadh8706 (2023)
An accurate pressure scale is a fundamental requirement to understand planetary interiors. Here, we establish a primary pressure scale extending to the multi-megabar pressures of the Earth's core, by combined measurement of the acoustic velocities an
Externí odkaz:
http://arxiv.org/abs/2104.02076
Autor:
Ishikawa, Daisuke, Baron, Alfred Q. R.
We compare several different ways of measuring the energy resolution for meV-resolved inelastic x-ray scattering (IXS): using scattering from poly(methyl methacrylate), PMMA, using scattering from borosilicate glass (Tempax), and using powder diffrac
Externí odkaz:
http://arxiv.org/abs/2103.04002