SEM and RMPA research of synthesized particles and objects in dense xenon (270 bar) irradiated by braking γ-rays with a maximum energy of 10 MeV

Natural xenon at an initial pressure of 270 bar in a special chamber (XeHPC) was irradiated for 43 h (1.548·10⁵ s) by braking γ-rays with a threshold energy of 10 MeV at electron accelerator MT-25 at an average intensity of the beam of 20-22 μA. After opening of XeHPC both internal chambers with all the structures and particles, but without gas, were measured using a γ-germanium detector (Canberra) in series with the detector background measurement, 15 hours each measurement. γ-spectra of short-lived isotopes, formed as a result of exposure, were obtained and processed. Visual inspection of the inner chambers surfaces showed visible brownish-yellowish coating of significant thickness. X-ray microprobe analysis (RMPA) and SEM studies allowed us to determine the composition of the synthesized particles and structural objects.