The size evolution of Pb nanoparticles (NPs) synthesized by ion implantation in an epitaxial Al film has been experimentally investigated. The average radius R of Pb NPs was determined as a function of implantation fluence f. The R(f) data were analyzed using various growth models. Our observations suggest that the size evolution of Pb NPs is controlled by the diffusion-limited growth kinetics ...

The present study describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination of extremely low concentrations of lead. It is based on flotation of a complex of Pb(2+) ions and Alizarin yellow between aqueous and n-hexane interface at pH = 6. The proposed procedure is also applied for determination of lead in both tap water and prepared se...

The research situation of the application carbon quantum dot fluorescent materials to detection metal ions, including current status and preface recent years, development trends are summarized. ions is highlighted, iron copper mercury lead silver ions. Finally, problems prospects for detecting discussed.

The purpose of this study is to analyze the chemical composition of wet precipitation in samples collected at three stations in the Candiota region in the Brazilian state of Rio Grande do Sul (RS). Samples were collected in 2004. Variables analyzed in wet precipitation were pH, conductivity, and concentration of Cl-, NO3-, SO4(2-) F-, Na+, Ca2+, Mg2+, K+, NH4+, Cu, Zn, Fe, Mn, Pb, Ni, Cd, Co, a...

In this talk an overview of the ALICE TRDis presented. The ALICE TRD consists of 540 individual detector modules with a total of 1.2 million readout channels. It allows electron identi cation above a momentum of 1 GeV/c and is capable of providing a very fast and eÆcient trigger on electrons with large transverse momentum pt. It will operate in a very high multiplicity environment. The rapidity...

The NA57 experiment has measured the pT distributions of K 0 S, Λ, and Λ particles in fixed-target Pb–Pb interactions at √ sNN = 17.3 GeV, as a function of the collision centrality. In this paper we study the central-toperipheral nuclear modification factors and compare them to other measurements and to theoretical predictions.

Hyperfine splitting in Bi 82+ and Pb 81+ ions was calculated using continuum RPA approach with effective residual forces. To fix the parameters of the theory the nuclear magnetic dipole moments of two one-particle and two one-hole nuclei around 208 Pb were calculated using the same approach. The contribution from velocity dependent two-body spin-orbit residual interaction was calculated explici...

After close to 20 years of preparation, the dedicated heavy-ion experiment A Large Ion Collider Experiment (ALICE) took first data at the CERN Large Hadron Collider (LHC) accelerator with proton collisions at the end of 2009 and with lead nuclei at the end of 2010. After a short introduction into the physics of ultra-relativistic heavy-ion collisions, this article recalls the main design choice...

In the title complex, {[Pb(C(8)H(7)O(3))(2)(H(2)O)]·H(2)O}(n), the Pb(II) atom is seven-coordinated by six carboxyl-ate O atoms from four different 2-hydroxy-phenyl-acetate (2-dph) ligands and one water mol-ecule, displaying a hemidirected irregular geometry, with the empty side of the metal ion capped by a benzene ring forming a Pb⋯π contact [Pb⋯centroid distance = 3.342 (2) Å]. One 2-dph liga...