skip to main content

DOE PAGESDOE PAGES

Title: The spectrum of density fluctuations of noble gases probed by THz neutron and x-ray spectroscopy

Approximately 50 years of inelastic scattering studies of noble gases are reviewed to illustrate the main advances achieved in the understanding of the THz dynamics of simple systems. The gradual departure of the spectral shape from the hydrodynamic regime is discussed with an emphasis on the phenomenology of fast (sub- ps) relaxation processes. This review shows that relaxation phenomena in noble gases have an essentially collisional origin, which is also revealed by the parallelism between their characteristic timescale and the interatomic collision time. In addition, recent THz spectroscopy results on noble gases at extreme thermodynamic conditions are discussed to illustrate the need for a revision of our current understanding of the supercritical phase.
Authors:
 [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-111785-2016-JA
Journal ID: ISSN 2076-3417; ASPCC7
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Applied Sciences
Additional Journal Information:
Journal Volume: 6; Journal Issue: 3; Journal ID: ISSN 2076-3417
Publisher:
MDPI
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; inelastic X-ray scattering; inelastic neutron scattering; noble gases; relaxation phenomena; liquid and supercritical systems
OSTI Identifier:
1341512

Cunsolo, Alessandro. The spectrum of density fluctuations of noble gases probed by THz neutron and x-ray spectroscopy. United States: N. p., Web. doi:10.3390/app6030064.
Cunsolo, Alessandro. The spectrum of density fluctuations of noble gases probed by THz neutron and x-ray spectroscopy. United States. doi:10.3390/app6030064.
Cunsolo, Alessandro. 2016. "The spectrum of density fluctuations of noble gases probed by THz neutron and x-ray spectroscopy". United States. doi:10.3390/app6030064. https://www.osti.gov/servlets/purl/1341512.
@article{osti_1341512,
title = {The spectrum of density fluctuations of noble gases probed by THz neutron and x-ray spectroscopy},
author = {Cunsolo, Alessandro},
abstractNote = {Approximately 50 years of inelastic scattering studies of noble gases are reviewed to illustrate the main advances achieved in the understanding of the THz dynamics of simple systems. The gradual departure of the spectral shape from the hydrodynamic regime is discussed with an emphasis on the phenomenology of fast (sub-ps) relaxation processes. This review shows that relaxation phenomena in noble gases have an essentially collisional origin, which is also revealed by the parallelism between their characteristic timescale and the interatomic collision time. In addition, recent THz spectroscopy results on noble gases at extreme thermodynamic conditions are discussed to illustrate the need for a revision of our current understanding of the supercritical phase.},
doi = {10.3390/app6030064},
journal = {Applied Sciences},
number = 3,
volume = 6,
place = {United States},
year = {2016},
month = {2}
}