Infrared absorption by localized electrons in solid deuterium

1985 ◽  
Vol 63 (8) ◽  
pp. 1105-1109 ◽  
Author(s):  
S. K. Bose ◽  
J. D. Poll
Keyword(s):  
Infrared Absorption ◽  
Electronic States ◽  
Bound State ◽  
State Transitions ◽  
Cavity Size ◽  
Broad Absorption ◽  
Solid Deuterium ◽  
Mode Oscillation ◽  
Different Types ◽  
Energy Bound

A broad absorption in the spectral region 4000–7500 cm−1 has been observed in tritiated as well as proton-irradiated samples of solid deuterium. To explain this absorption we investigate two different types of localized electronic states in the solid. It is shown that the absorption can be interpreted as being due to the lowest energy bound-state transitions of electrons localized in nonspherical cavities of two different average radii. The localization is assumed to be initiated by vacancies. The shape of the absorption line is calculated by estimating the cavity size and the frequency of the breathing-mode oscillation of these cavities.

scholarly journals The interaction of CO molecules on Au–Rh bimetallic nanoclusters supported on a thin film of Al2O3/NiAl(100)

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13362-13371 ◽  
Author(s):  
Hsuan Lee ◽  
Zhen-He Liao ◽  
Po-Wei Hsu ◽  
Ting-Chieh Hung ◽  
Yu-Cheng Wu ◽  
...  
Keyword(s):  
Thin Film ◽  
Infrared Absorption ◽  
Electronic States ◽  
Bimetallic Clusters ◽  
Absorption Intensity ◽  
Bimetallic Nanoclusters ◽  
Binding Surface

The varied infrared absorption intensity of CO on bimetallic clusters reflects altered electronic states of CO-binding surface atoms.

Imogolite: a unique aluminosilicate

Clay Minerals ◽  
1969 ◽  
Vol 8 (1) ◽  
pp. 87-99 ◽  
Author(s):  
J. D. Russell ◽  
W. J. McHardy ◽  
A. R. Fraser
Keyword(s):  
Electron Diffraction ◽  
Infrared Absorption ◽  
Chain Structure ◽  
Absorption Bands ◽  
Repeat Units ◽  
Sample Orientation ◽  
Different Types ◽  
Stretching Vibrations ◽  
Diffraction Patterns ◽  
Silicate Chain

The fibrous aluminosilicate imogolite has been studied by electronoptical and infrared absorption methods. Electron diffraction patterns are interpreted in terms of repeat units of 8·4 Å parallel and 23 Å perpendicular to the fibre axis. These spacings can not be reconciled with a continuous silicate chain structure and this conclusion is supported by an Si-O vibration near 930 cm−1. A structure is postulated in which distorted chains of Al-O octahedra are cross-linked through isolated Si2O7 groups.Multiple OH stretching vibrations indicate different types of OH group in the imogolite structure. Absorption bands near 1000, 700 and 600 cm−1 are sensitive to sample orientation. This is attributed to the morphology and dimensions of the imogolite fibres.

The Digitized First Byurakan Survey - DFBS

2005 ◽  
Vol 216 ◽  
pp. 230-238 ◽  
Author(s):  
A. M. Mickaelian ◽  
L. A. Sargsyan ◽  
L. K. Erastova ◽  
S. K. Balayan ◽  
K. S. Gigoyan ◽  
...  
Keyword(s):  
Emission Lines ◽  
Web Page ◽  
Broad Absorption ◽  
Byurakan Survey ◽  
First Byurakan Survey ◽  
X Ray ◽  
Different Types ◽  
New Research ◽  
Spectral Survey ◽  
Flux Calibration

The First Byurakan Survey (FBS) is the largest spectral survey in the Northern sky. One can select objects by color, broad absorption and emission lines, and SED; classify and investigate them. The digitization of the FBS is aimed at making a DFBS database available for the astronomical community. Besides scanning, we are creating plate solutions, extraction software, wavelength and flux calibration, templates for different types of objects, numerical classification, a catalog of objects, a database of spectra, a user interface and a DFBS web page. New research projects based on the DFBS are possible, including a search for new QSOs and other AGN, a continuation of the second part of FBS, and identifications of radio, IR and X-ray sources. The DFBS database will be available at the end of 2004.

scholarly journals Development of an individual-based model for polioviruses: implications of the selection of network type and outcome metrics

2010 ◽  
Vol 139 (6) ◽  
pp. 836-848 ◽  
Author(s):  
H. RAHMANDAD ◽  
K. HU ◽  
R. J. DUINTJER TEBBENS ◽  
K. M. THOMPSON
Keyword(s):  
Network Structure ◽  
Critical Role ◽  
State Transitions ◽  
Different Types ◽  
Support Policy ◽  
The Individual ◽  
The Impact ◽  
Potential Use ◽  
Selection Of ◽  
Outcome Metrics

SUMMARYWe developed an individual-based (IB) model to explore the stochastic attributes of state transitions, the heterogeneity of the individual interactions, and the impact of different network structure choices on the poliovirus transmission process in the context of understanding the dynamics of outbreaks. We used a previously published differential equation-based model to develop the IB model and inputs. To explore the impact of different types of networks, we implemented a total of 26 variations of six different network structures in the IB model. We found that the choice of network structure plays a critical role in the model estimates of cases and the dynamics of outbreaks. This study provides insights about the potential use of an IB model to support policy analyses related to managing the risks of polioviruses and shows the importance of assumptions about network structure.

Core‐electron excitations and the electronic decay of core‐to‐bound‐state transitions in condensed azabenzenes

1989 ◽  
Vol 91 (1) ◽  
pp. 20-28 ◽  
Author(s):  
R. Dudde ◽  
M. L. M. Rocco ◽  
E. E. Koch ◽  
S. Bernstorff ◽  
W. Eberhardt
Keyword(s):  
Bound State ◽  
State Transitions ◽  
Core Electron ◽  
Electron Excitations

Ultraviolet absorption in proton-irradiated solid deuterium

1990 ◽  
Vol 68 (11) ◽  
pp. 1247-1250 ◽  
Author(s):  
J. A. Forrest ◽  
J. L. Hunt ◽  
R. L. Brooks
Keyword(s):  
Proton Beam ◽  
Potential Model ◽  
Ultraviolet Absorption ◽  
Broad Absorption ◽  
Electron Bubbles ◽  
Solid Deuterium ◽  
Square Well ◽  
Localized Electrons

A broad absorption near a wavelength of 350 nm in proton-irradiated solid deuterium at 4.2 K has been measured. The absorption is caused by the resonant detrapping of localized electrons from their quantum bubbles. The growth and decay of the absorption with onset and termination of the proton beam is shown to be consistent with similar timing measurements on other spectroscopic features associated with the localized electrons. A simple square-well potential model is used to estimate the depth of the well and the size of the electron bubbles.

scholarly journals Infrared absorption spectrum of solid deuterium at near-triple point temperature

2013 ◽  
Vol 62 (16) ◽  
pp. 163301
Author(s):  
Liu Jiang-Ping ◽  
Bi Peng ◽  
Lei Hai-Le ◽  
Li Jun ◽  
Wei Jian-Jun
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Triple Point ◽  
Infrared Absorption Spectrum ◽  
Point Temperature ◽  
Solid Deuterium ◽  
Triple Point Temperature
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