University of Rajasthan

About: University of Rajasthan is a education organization based out in Jaipur, India. It is known for research contribution in the topics: Chemical shift & Derivative (chemistry). The organization has 15058 authors who have published 15733 publications receiving 117400 citations. The organization is also known as: Rajasthan University.

Measurements of transverse energy distributions in Au plus Au collisions at root s(NN)=200 GeV

Abstract: Transverse energy (E{sub T}) distributions have been measured for Au+Au collisions at {radical}s{sub NN} = 200 GeV by the STAR collaboration at RHIC. E{sub T} is constructed from its hadronic and electromagnetic components, which have been measured separately. E{sub T} production for the most central collisions is well described by several theoretical models whose common feature is large energy density achieved early in the fireball evolution. The magnitude and centrality dependence of E{sub T} per charged particle agrees well with measurements at lower collision energy, indicating that the growth in E{sub T} for larger collision energy results from the growth in particle production. The electromagnetic fraction of the total E{sub T} is consistent with a final state dominated by mesons and independent of centrality.

XPS and AFM surface study of PMMA irradiated by electron beam

Abstract: The effect of low energy electron (LEE) irradiation on polymethylmethacrylate (PMMA) film has been studied. The PMMA film of thickness 20 μm is exposed by a 10 keV electron beam with fluence 2 × 10 14 e/cm 2 . The irradiated film was characterized by X-ray Photoelectron Spectroscopy (XPS) and Atomic Force Microscopy (AFM). The significant changes in the chemical composition of the surface layer were confirmed by XPS quantitatively. The scission of the chain in the surface layer of PMMA film was induced by electron irradiation and the atomic ration (O 1s /C 1s ) was decreased. This phenomenon is responsible for the creation of carbon-rich surface layer. TM-AFM showed hills of nano size surrounded by crater-type features on the irradiated film. The root-mean-square (rms) surface roughness of the sample increased from 3.715 nm to 5.020 nm due to the irradiation, which shows that the surface became rougher after irradiation.

K*0 production in Cu + Cu and Au + Au collisions at √sNN=62.4 GeV and 200 GeV

Abstract: We report on K*(0) production at midrapidity in Au + Au and Cu + Cu collisions at root s(NN) = 62.4 and 200 GeV collected by the Solenoid Tracker at the Relativistic Heavy Ion Collider detector. The K*(0) is reconstructed via the hadronic decays K*(0) -> K+pi(-) and (K*(0)) over bar -> K+pi(-). Transverse momentum, p(T), spectra are measured over a range of p(T) extending from 0.2 GeV/c up to 5 GeV/c. The center-of-mass energy and system size dependence of the rapidity density, dN/dy, and the average transverse momentum, , are presented. The measured N(K*(0))/N(K) and N(phi)/N(K*(0)) ratios favor the dominance of rescattering of decay daughters of K*(0) over the hadronic regeneration for the K*(0) production. In the intermediate p(T) region (2.0 < p(T) < 4.0 GeV/c), the elliptic flow parameter, v(2), and the nuclear modification factor, R-CP, agree with the expectations from the quark coalescence model of particle production.