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47Sc is a theranostic radionuclide under the spotlight of the scientific community thanks to its potential for SPECT imaging and therapeutic applications. This work presents the recent measurements of proton-induced nuclear reaction cross-sections aimed at 47Sc production using enriched 48Ti, 49Ti and 50Ti targets from 23 up to 70 MeV. Since the co-production of contaminant isotopes is a key issue, and 46Sc is the main one having a longer half-life than 47Sc, the 48/49/50Ti(p,x)47Sc and 46Sc cross sections are presented and compared with the scarce literature data and TALYS estimations. [ABSTRACT FROM AUTHOR]

We propose a process technology that can be applied to a variety of applications by machining existing lenses to create an optical system required for research by modifying commercial glass optical systems. A 1-in. hole was created in an LF5 glass lens by drilling, followed by spiral grinding, and finally, precision spiral grinding. In addition, cracking and chipping were analyzed according to the processing process and optimized process conditions. We fabricated an achromatic doublet lens with a diameter of 50.8 mm, focal fa of 75 mm and fba of 65.7 mm, under optimized processing conditions. The processed lenses were determined by measuring the surface geometry of the lenses using ASI, and the lenses were inspected internally using OCT and dark field measurements to verify the internal sectional cracks and chipping of the lenses. The results confirm that there are no problems with the use of the hole in the existing glass lens as an optics. In addition, the manufactured lens will be available as an integrated optical system that can combine lenses with mirrors or detectors to create small systems and multi-axial views. [ABSTRACT FROM AUTHOR]

The high-specific activity Mo accelerator-based production, via the (α,n) reaction on Zr-enriched target, has been investigated in the present work. The excitation function measurement has been performed in the energy range 8-34 MeV at the ARRONAX facility, using the well-known stacked foils technique on natural zirconium as target. A general good agreement in the cross section trend has been observed, once compared to former measurements. A different (i.e. higher) peak value and a shift of about 2 MeV towards larger energies have however been found. Assuming a fully enriched Zr target irradiated by an α-beam at suitable energy ( E = 25 MeV), the Mo production yield has thus been estimated. At last the alternative production routes, based on the Zr(α,n)Mo and Mo(p,x)Mo/Tc reactions, are compared. [ABSTRACT FROM AUTHOR]

The correction formula for the neutron fluence rate fluctuation on the measured radioactive of the neutron irradiated sample was obtained based on the regulation of growing and decay of artificial radioactive nuclide. This was done based on the fluence of the 14 MeV mono-energetic neutron generated by T(d,n)He reaction. Combining with the actual measured counts and spectra of the accompanying alpha-particles, for the different irradiating time, the different half-life, neutron fluence rate fluctuation factor was calculated and discussed. The experimental results show that in the cross section measurement of neutron-induced reactions, the irradiation time of the samples should be less than or close to the half-life period of the daughter nucleus of the measured reaction such that the corrected values of the fluctuation factors are close to one. [ABSTRACT FROM AUTHOR]