7,969 research outputs found
Characterization of Jets in Relativistic Heavy Ion Collisions
Jet quenching is considered to be one of the signatures of the formation of
quark gluon plasma. In order to investigate the jet quenching, it is necessary
to detect jets produced in relativistic heavy ion collisions, determine their
properties and compare those with the jets one obtains in hadron-hadron or
collisions. In this work, we propose that calculation of flow
parameters may be used to detect and characterize jets in relativistic heavy
ion collisions.Comment: 18 pages, 4 figures, more discussions are added, to be published in
Phys. Rev.
Design and fabrication of a data logger for atmospheric pressure, temperature and relative humidity for gas-filled detector development
A novel instrument has been developed to monitor and record the ambient pa-
rameters such as temperature, atmospheric pressure and relative humidity. These
parameters are very essential for understanding the characteristics such as
gain of gas filled detectors like Gas Electron Multiplier (GEM) and Multi Wire
Propor- tional Counter (MWPC). In this article the details of the design,
fabrication and operation processes of the device has been presented.Comment: 11 pages, 12 figure
Effects of edge magnetism and external electric field on energy gaps in multilayer graphene nanoribbons
Using first-principles density-functional theory, we study the electronic
structure of multilayer graphene nanoribbons as a function of the ribbon width
and the external electric field, applied perpendicular to the ribbon layers. We
consider two types of edges (armchair and zigzag), each with two edge
alignments (referred to as alpha- and beta-alignments). We show that, as in
monolayer and bilayer armchair nanoribbons, multilayer armchair nanoribbons
exhibit three classes of energy gaps which decrease with increasing width.
Nonmagnetic multilayer zigzag nanoribbons have band structures that are
sensitive to the edge alignments and the number of layers, indicating different
magnetic properties and resulting energy gaps. We find that energy gaps can be
induced in ABC-stacked ribbons with a perpendicular external electric field
while in other stacking sequences, the gaps decrease or remain closed as the
external electric field increases.Comment: 7 pages, 9 figures, text revised, last version before publicatio
Shell model and deformed shell model spectroscopy of Ga
In the present work we have reported comprehensive analysis of recently
available experimental data [H.M. David et al., Phys. Lett. B {\bf 726}, 665
(2013)] for high-spin states up to with in the odd-odd
nucleus Ga using shell model calculations within the full
model space and deformed shell model based on Hartee-Fock
intrinsic states in the same space. The calculations have been performed using
jj44b effective interaction developed recently by B.A. Brown and A.F. Lisetskiy
for this model space. The results obtained with the two models are similar and
they are in reasonable agreement with experimental data. In addition to the
and energy bands, band crossings and electromagnetic transition
probabilities, we have also calculated the pairing energy in shell model and
all these compare well with the available theoretical results.Comment: 9 pages, 4 figure
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