[en] Basic clinical interest and, in some cases, regulatory recommendations request measurement or, at least, estimation of the dose to the male gonads in radiotherapic treatments. Subdiaphragmatic, rectal and post-surgical seminoma target treatments in adults have been taken into account. The proximity of target volume or the particular request for fertility evaluation make the problem more relevant. Solid-state detectors give interesting opportunities for in vivo dosimetry out of the therapeutic beams. In vivo and in phantom dosimetry have been performed, in order to set direct data and indirect estimates. Ionization chamber measurements have been collected and used as reference values for semiconductors calibration. Also thermoluminescent dosimetry has been used for a comparison. Feasibility, accuracy and reproducibility results show that the use of solid state dosimetry for radioprotection in radiotherapy is very stimulating. A procedure for the evaluation of male gonads dose in radiotherapy is proposed. Solid-state and thermoluminescent dosimetry in some clinical cases have been compared with our protocol evaluations, showing encouraging results

[en] Submicronic powder of silicon carbide was synthesized in a pilot novel radiofrequency plasma torch reactor. The precursors were pyrolysis char and silica powders both with micrometric size. The mass rate of the precursor powder varied in the range 600-2500 g/h. The maximum test time was approximately 3 h. With the goal to increase the process yield, several technical measures were implemented. Silicon carbide yield was above 70 wt% when the plasma flame was confined by a tube that prolonged the residence time of the reactants at the useful temperature for the advancement of reaction. The silicon carbide was characterized by XRD, SEM, and DLS. Both α and β-crystalline phases were detected. (author)

[en] A full carbon diamond detector is proposed for the active target of PADME, an experiment which uses the positron beam of the BTF (Beam Test Facility) at the Laboratori Nazionali di Frascati to search for the production of dark photons in e"+e"− annihilation (M. Raggi et al., Adv. High Energy Phys. 2014 (2014) 959802). This paper presents the preliminary results of a beam test done in November 2015 of the PADME active target prototype.

[en] We have measured the transverse asymmetry A_T' in the quasi-elastic ³/rvec He/(/rvec e/,e') process with high precision at Q²-values from 0.1 to 0.6 (GeV/c)². The neutron magnetic form factor G_Mⁿ was extracted at Q²-values of 0.1 and 0.2 (GeV/c)² using a non-relativistic Faddeev calculation which includes both final-state interactions (FSI) and meson-exchange currents (MEC). Theoretical uncertainties due to the FSI and MEC effects were constrained with a precision measurement of the spin-dependent asymmetry in the threshold region of ³/rvec He/(/rvec e/,e'). We also extracted the neutron magnetic form factor G_Mⁿ at Q²-values of 0.3 to 0.6 (GeV/c)² based on Plane Wave Impulse Approximation calculations