3,590 research outputs found
Soft probes of high density QCD physics with CMS
The CMS heavy-ion program will probe QCD matter under extreme conditions. Its
capabilities for the study of global observables and soft probes are described.Comment: 6 pages, 10 figures. Presented at the International Conference on
Strangeness in Quark Matter 2007, Levoca, Slovakia, 28 June 200
Size distribution and waiting times for the avalanches of the Cell Network Model of Fracture
The Cell Network Model is a fracture model recently introduced that resembles
the microscopical structure and drying process of the parenchymatous tissue of
the Bamboo Guadua angustifolia. The model exhibits a power-law distribution of
avalanche sizes, with exponent -3.0 when the breaking thresholds are randomly
distributed with uniform probability density. Hereby we show that the same
exponent also holds when the breaking thresholds obey a broad set of Weibull
distributions, and that the humidity decrements between successive avalanches
(the equivalent to waiting times for this model) follow in all cases an
exponential distribution. Moreover, the fraction of remaining junctures shows
an exponential decay in time. In addition, introducing partial breakings and
cumulative damages induces a crossover behavior between two power-laws in the
avalanche size histograms. This results support the idea that the Cell Network
Model may be in the same universality class as the Random Fuse Model
A conceptual design of an advanced 23 m diameter IACT of 50 tons for ground-based gamma-ray astronomy
A conceptual design of an advanced Imaging Air Cherenkov Telescope with a 23
m diameter mirror and of 50 tons weight will be presented. A system photon
detection efficiency of 15-17%, averaged over 300-600 nm, is aimed at to lower
the threshold to 10-20 GeV. Prospects for a second generation camera with
Geiger-mode Avalanche Photo Diodes will be discussed.Comment: 4 pages, 1 figure, to appear in the proceedings of the 31th
International Cosmic Ray Conference, Lodz, Poland, 200
Bound and unbound rovibrational states of the methane-argon dimer
Peculiarities of the intermolecular rovibrational quantum dynamics of the
methane-argon complex are studied using a new, ab initio potential energy
surface [Y. N. Kalugina, S. E. Lokshtanov, V. N. Cherepanov, and A. A. Vigasin,
J. Chem. Phys. 144, 054304 (2016)], variational rovibrational computations, and
detailed symmetry considerations within the molecular symmetry group of this
floppy complex as well as within the point groups corresponding to the local
minimum structures. The computed (ro)vibrational states up to and beyond the
dissociation asymptote are characterized using two limiting models: the rigidly
rotating molecule's model and the coupled-rotor model of the rigidly rotating
methane and an argon atom orbiting around it
Wide range optical studies on transparent SWNT films
We present transmission spectra from the far infrared through the ultraviolet region on
freestanding SWNT films at temperatures between 40 and 300 K. Several interesting features are
observed in the low-frequency part of the spectrum: the Drude-like frequency dependence of the
metallic tubes as well as a (sample-dependent) peak in the conductivity around 0.01 eV. We also
studied the accidental nitrate doping of the SWNT samples during purification by nitric acid. Asprepared
purified samples exhibit increased metallic absorption and decreased interband transitions;
these features disappear on heating in vacuum
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