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The K-shell ionization cross sections of titanium and copper atoms were determined by analyzing the spectra of characteristic X-ray radiation generated by an electron beam with energies of 1 and 2 GeV in metal foils. New data obtained for these energies demonstrate the influence of the density effect on the ionization cross sections values. The results were compared with previous experimental data and calculations based on pure theoretical and semi-empirical models.

Several experimental groups observed temporary modulations of some nuclei strong and weak decay constants, which are of the order of 10−3 and with periods of one year, solar day, i.e. 24 hours and some others. In our experiments the decay rates were measured for 55Fe e-capture and 60Co β-decay during 2012–2020. Altogether, six decay rate dips of the order 10−2 – 10−3 and with duration from 40 to 208 hours were found, they deviate essentially from exponential decay rate fit. It is shown that their occurrence correlate with x-ray solar flares with significant reliability. Besides, two long term deviations of 55Fe decay rate of 62 and 41 days were observed in 2017–2018, it’s argued that they are related to the change of 11 year solar cycle stages.

A multi-wirescanner for diagnostics of ionizing particle beams (e.g. both non-relativistic and ultra-relativistic charged particles; X-ray and gamma photons) is proposed and discussed in the paper. The scanner is based on measurement of yield of characteristic X-rays generated during the particle interaction with the wires made of different materials. The proposed scanner is developed and tested on the beam of electrons with energy of 40 keV . The quasimonochromatic characteristic X-rays and continuous background are clearly identified. The results of measurements of the transverse size, emittance, position and direction of beam propagation are presented and discussed.