Large-scale production of Y and Zr/Y generators: A proof of concept study for a 70 MeV H cyclotron.

The large-scale production of Y with proton-induced reactions has been investigated from the perspective of new generation 70 MeV H cyclotrons. Tandem target configurations are presented for both the direct production of Y as well as for producing Zr/Y generators. Based on the relevant excitation functions, physical yields have been derived for Y production with YO/SrCO tandem targets and Zr production with Zr/YO tandem targets.

Pairing of thorium with selected primary target materials in tandem configurations: Co-production of Ac/Bi and U/Th generators with a 70 MeV H cyclotron.

Several radionuclide production facilities based on a new generation of high-current, 70 MeV H cyclotrons have been established in recent years and a number of new facilities are either under construction or being planned. In this study, the feasibility to produce Ac/Bi and U/Th generators via Th + p reactions at such a facility has been investigated. From the perspective of production yields, it has been found useful to compare the relevant reactions on thorium with those on other targets regularly employed in this energy region, in particular the Mg(p,x)Na, Ga(p,x)Ge, and Rb(p,x)Sr reactions that have been exploited with 66 MeV proton beams at iThemba LABS for many years.

Anomalous Evolution of the Near-Side Jet Peak Shape in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV.

The measurement of two-particle angular correlations is a powerful tool to study jet quenching in a p_{T} region inaccessible by direct jet identification. In these measurements pseudorapidity (Δη) and azimuthal (Δφ) differences are used to extract the shape of the near-side peak formed by particles associated with a higher p_{T} trigger particle (1 View Article and Find Full Text PDF

Concurrent spectrometry of annihilation radiation and characteristic gamma-rays for activity assessment of selected positron emitters.

A method is described to determine the activity of non-pure positron emitters in a radionuclide production environment by assessing the 511keV annihilation radiation concurrently with selected γ-lines, using a single High-Purity Germanium (HPGe) detector. Liquid sources of Na, Fe, Mn, Cu, Cu, Zn, Ga, Ga, Rb, Y, Zr and Cs were prepared specifically for this study. Acrylic absorbers surrounding the sources ensured that the emitted β-particles could not escape and annihilate away from the source region.

Measurement of azimuthal correlations of D mesons with charged particles in pp collisions at [Formula: see text] TeV and p-Pb collisions at [Formula: see text] TeV.

The azimuthal correlations of D mesons with charged particles were measured with the ALICE apparatus in pp collisions at [Formula: see text] and p-Pb collisions at [Formula: see text] at the Large Hadron Collider. [Formula: see text], [Formula: see text], and [Formula: see text] mesons and their charge conjugates with transverse momentum [Formula: see text] and rapidity in the nucleon-nucleon centre-of-mass system [Formula: see text] (pp collisions) and [Formula: see text] (p-Pb collisions) were correlated to charged particles with [Formula: see text]. The yield of charged particles in the correlation peak induced by the jet containing the D meson and the peak width are compatible within uncertainties in the two collision systems.