A study of the element composition and surface structure changes during irradiation of dense xenon (270 atm) by braking γ-rays with a maximum energy of 10 MeV

Natural xenon at an initial pressure of 270 atm in the high-pressure chamber (XeHPC) was irradiated for 43 hours by braking γ-rays with a threshold energy of 10 MeV at the MT-25 electron accelerator at an average beam intensity of 20-22 A. The results on gamma activation analysis of the relevant short-lived radionuclides are presented. When opening the XeHPC, the internal assembly without xenon was installed on the precision γ-germanium detector (HPGe-Canberra) for 15-hour measurements of γ-spectra of radionuclides formed in XeHPC, and the background. Visual inspection of the inside of the assembly revealed that its surface was covered with a thin film of greenish-yellow color. SEM studies and X-ray probe microanalysis (XRPMA) have allowed us to determine the composition of the synthesized microparticles. To explain the observed anomalies in the formation of new elements in the microparticles and microobjects, possible nuclear fission and fusion reactions are presented.