scholarly journals Boson peak in ultrathin alumina layers investigated with neutron spectroscopy

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
D. L. Cortie ◽  
M. J. Cyster ◽  
T. A. Ablott ◽  
C. Richardson ◽  
J. S. Smith ◽  
...  
Keyword(s):  
Boson Peak ◽  
Neutron Spectroscopy

Low-temperature thermal conductivity and boson peak in the glassy g-As2S3

2016 ◽  
Vol 39 (0) ◽  
pp. 66-72
Author(s):  
В. Міца ◽  
О. Фегер ◽  
С. Петрецький ◽  
Р. Голомб ◽  
В. Ткач
Keyword(s):  
Thermal Conductivity ◽  
Low Temperature ◽  
Boson Peak

SELF-COMPENSATED CASED-HOLE PULSED NEUTRON SPECTROSCOPY MEASUREMENTS

2020 ◽  
Author(s):  
Tong Zhou ◽  
◽  
David Rose ◽  
Jeffrey Miles ◽  
Jason Gendur ◽  
...  
Keyword(s):  
Neutron Spectroscopy ◽  
Pulsed Neutron

scholarly journals Impact of Chemical Structure on the Dynamics of Mass Transfer of Water in Conjugated Microporous Polymers: A Neutron Spectroscopy Study

2021 ◽  
Vol 3 (2) ◽  
pp. 765-776
Author(s):  
Anne A. Y. Guilbert ◽  
Yang Bai ◽  
Catherine M. Aitchison ◽  
Reiner Sebastian Sprick ◽  
Mohamed Zbiri
Keyword(s):  
Mass Transfer ◽  
Chemical Structure ◽  
Neutron Spectroscopy ◽  
Spectroscopy Study ◽  
Microporous Polymers ◽  
Conjugated Microporous Polymers

scholarly journals Boson peak and structural heterogeneity in ternary SiO 2 ‐Al 2 O 3 ‐B 2 O 3 glasses

2021 ◽  
Author(s):  
Mariana Fatobene Ando ◽  
Sindy Fuhrmann ◽  
Zhiwen Pan ◽  
Bruno Poletto Rodrigues ◽  
Tatsuya Mori ◽  
...  
Keyword(s):  
Structural Heterogeneity ◽  
Boson Peak

scholarly journals Terahertz and Microwave Optical Properties of Single-Crystal Quartz and Vitreous Silica and the Behavior of the Boson Peak

2021 ◽  
Vol 11 (15) ◽  
pp. 6733
Author(s):  
Mira Naftaly ◽  
Andrew Gregory
Keyword(s):  
Single Crystal ◽  
Silica Glass ◽  
Broad Band ◽  
Peak Frequency ◽  
Vitreous Silica ◽  
Peak Height ◽  
Fused Silica ◽  
Boson Peak ◽  
Single Crystal Quartz ◽  
Crystal Quartz

Z-cut single-crystal quartz and vitreous silica (silica glass or fused silica) were evaluated for use as reference materials for terahertz and microwave measurements of complex permittivity, with Z-cut quartz confirmed as being suitable. Measurements of refractive indices and absorption coefficients for o-ray and e-ray in quartz and for vitreous silica are reported at frequencies between 0.2 and 6 THz and at 36 and 144 GHz, and compared with data reported in the literature. A previously unreported broad band was seen in the extraordinary absorption of quartz. The Boson peak in silica glass absorption was examined, and for the first time, two negative relationships have been observed: between the refractive index and the Boson peak frequency, and between the Boson peak height and its frequency.

High-Resolution Neutron Spectroscopy for the Investigation of Hydrogen Diffusion and Molecular Rotations in Solids

1993 ◽  
Vol 48 (1-2) ◽  
pp. 406-414
Author(s):  
T. Springer
Keyword(s):  
High Resolution ◽  
Hydrogen Diffusion ◽  
Quantum Effects ◽  
Quantum States ◽  
The Other ◽  
Neutron Spectroscopy ◽  
Impurity Atoms ◽  
Molecular Rotations ◽  
Rotational Motions ◽  
Diffusion Of Hydrogen

Abstract An introductory survey on applications of high-resolution neutron spectroscopy is presented, dealing with the motion of hydrogen in solids, namely concerning (i) random rotational motions or stationary tunneling states of NH+4-ions or CH3-groups, and (ii) diffusion of hydrogen in alloys. For the rotation of hydrogenous groups in solids, at higher temperatures rotational jumps can be found, whereas quantum states are observed by μeV-spectroscopy at temperatures below 50 K. On the other hand, hydrogen diffusion does not reveal pronounced evidence of quantum effects, except for hydrogen in a metal containing impurity atoms.

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