Search results for " Clusters"
showing 10 items of 1091 documents
Adsorption Studies of Molecules on the Halloysite Surfaces: A Computational and Experimental Investigation
2017
We report the results of joint computational and experimental investigations on the adsorption capability of halloysite toward a set of common molecules (water, alcohols, halides, and carboxylic acids). The halloysite system has been modelized by means of a cluster approach choosing a portion of a spiral nanotube; it has a slight curvature, with a convex aluminic layer. The adsorption geometries are described in terms of hydrogen bond network structures; calculated interaction energies invariably indicate that the inner aluminic surface is the place for preferential adsorption of polar molecules. The presence of substitutional defects on the outer or inner surface of the halloysite model ca…
Stability of carbon nanotubes under electron irradiation: Role of tube diameter and chirality
2005
As recent experiments demonstrate, the inner shells of multiwalled carbon nanotubes are more sensitive to electron irradiation than the outer shells. To understand the origin of such counterintuitive behavior, we employ a density-functional-theory based tight-binding method and calculate the displacement threshold energies for carbon atoms in single-walled nanotubes with different diameters and chiralities. We show that the displacement energy and the defect production rate strongly depend on the diameter of the nanotube and its chirality, with the displacement energy being lower, but saturating towards the value for graphite when the tube diameter increases. This implies that the threshold…
"Table 1" of "Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC"
2012
(1) Number of generated MC events for the scalar top signal grid (2) Relative Cross section uncertainties for the scalar top signal grid.
"Table 1" of "Measurement of the t anti-t production cross-section in p anti-p collisions using dilepton events"
2008
TOP TOPBAR production cross section for top quark mass 175 GeV.
"Table 1" of "Measurement of the t anti-t production cross section in p anti-p collisions at s**(1/2) = 1.96-TeV"
2008
The combined result for the TOP TOPBAR production cross section at top quark mass of 175 GeV.. The second DSYS error is the uncertainty on the luminosity.
"Table 2" of "Measurement of the t anti-t production cross section in p anti-p collisions at s**(1/2) = 1.96-TeV"
2008
The cross section for TOP TOPBAR production at the world average top quark mass of 172.6 GeV.. Errors contain both statistics and systematics.
"Table 12" of "Search for light scalar top quark pair production in final states with two leptons with the ATLAS detector in sqrt(s) = 7 TeV proton-p…
2012
Distribution of the Jet Multiplicity for all events in the Top Control Region.
"Table 1" of "t anti-t production cross-section in p anti-p collisions at s**(1/2) = 1.8-TeV"
2002
Measured top quark pair production cross section in the different channels and the various averages, including the overall average.
"Table 10" of "Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at $\sqrt{s}=8$ TeV with the ATLAS detec…
2017
The top-antitop asymmetry dependence on the transverse momentum of the top-antitop system ($p_T^{t\bar{t}}$) in the fiducial volume.
"Table 4" of "Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at $\sqrt{s}=8$ TeV with the ATLAS detect…
2017
The leptonic asymmetry dependence on the invariant mass of top-antitop system ($m_{t\bar{t}}$) in the fiducial volume.