9,485 research outputs found
Behaviour of the EAS Age Parameter in the Knee Energy Region
Analyzing simulated EAS events generated with the CORSIKA code, the
characteristics of lateral distribution of electrons in EAS around the knee
energy region of the primary energy spectrum have been studied and compared
with experimental observations. The differences between the EGS4 and the NKG
output of CORSIKA in respect to electron radial density distribution have been
investigated. The relation between lateral and longitudinal age parameters has
been studied after introducing the notion of the local age parameter that
reflects the profile of the lateral distribution of electrons in EAS. The
present analysis motivates the inclusion of the lateral shower age in a
multiparameter study of EAS to extract information on hadronic interactions and
primary composition.Comment: Talk presented at XVI International Symposium on Very High Energy
Cosmic Ray Interactions (ISVHECRI 2010), Batavia, IL, USA (28 June - 2 July
2010). 4 pages, 5 figure
Mean field baryon magnetic moments and sumrules
New developments have spurred interest in magnetic moments (-s) of
baryons. The measurement of some of the decuplet -s and the findings of
new sumrules from various methods are partly responsible for this renewed
interest. Our model, inspired by large colour approximation, is a relativistic
self consistent mean field description with a modified Richardson potential and
is used to describe the -s and masses of all baryons with up (u), down (d)
and strange (s) quarks. We have also checked the validity of the Franklin
sumrule (referred to as CGSR in the literature) and sumrules of Luty,
March-Russell and White. We found that our result for sumrules matches better
with experiment than the non-relativistic quark model prediction. We have also
seen that quark magnetic moments depend on the baryon in which they belong
while the naive quark model expects them to be constant.Comment: 7 pages, no figure, uses epl.cl
A note on matrix model with IR cutoff and AdS/CFT
We propose an effective model of strongly coupled gauge theory at finite
temperature on in the presence of an infrared cutoff. It is constructed
by considering the theory on with an infrared cutoff and then taking the
size of the to infinity while keeping the cutoff fixed. This model
reproduces various qualitative features expected from its gravity dual.Comment: 27 pages, 9 figures, an appendix added, other minor changes, journal
versio
Magnetska svojstva monokristala bizmuta punjenih galijem i indijem
Diamagnetic susceptibility in single crystals of bismuth doped with gallium and indium has been measured as a function of temperature between 100 and 300 K. Susceptibility decreases with the increase of temperature for each of the samples and also with the increase of the percentage of impurity. An attempt has been made to explain properly the observed phenomena on the basis of the large diamagnetism exhibited by valence electrons.Mjerili smo dijamagnetsku susceptibilnost monokristala bizmuta punjenih galijem i indijem u ovisnosti o temperaturi između 100 i 300 K. Susceptibilnost se smanjuje s povećanjem temperature i povećanjem punjenja za sve uzorke. Predlažemo tumačenje postignutih ishoda mjerenja na osnovi jakog dijamagnetizma koji pokazuju valentni elektroni
Radiating spherical collapse with heat flow
We present here a simple model of radiative gravitational collapse with
radial heat flux which describes qualitatively the stages close to the
formation of a superdense cold star. Starting with a static general solution
for a cold star, the model can generate solutions for the earlier evolutionary
stages. The temporal evolution of the model is specified by solving the
junction conditions appropriate for radiating gravitational collapse.Comment: 13 pages, including 3 figures, submitted to IJMP-
Effects of partial crystallinity and quenched-in defects on corrosion of a rapidly solidified Ti-Cu alloy
Rapid solidification by planar flow casting has been found to have introduced deficiencies, viz. partial crystallinity, air pockets and compositional difference in the ribbons of rapidly solidified Ti42.9Cu57.1 alloy. In order to investigate the effects of these deficiencies on the corrosion of rapidly solidified Ti42.9Cu57.1 alloy ribbons, electrochemical behaviour of alloy ribbons has been investigated in the acidic chloride environments at room temperature by taking into consideration each side of the alloy ribbon separately. The alloy displayed passivity followed by pitting corrosion. In the as- solidified condition, air pockets appear to be the most detrimental defect from the viewpoint of corrosion resistance of the alloy ribbons
- …