Properties of carbon-based structures synthesized in nuclear reactions under braking γ-quanta irradiation with 10 MeV threshold energy at 1.1 kbar helium gas pressure

The helium gas at 1.1 kbar initial pressure inside a helium high-pressure chamber (HeHPC) was irradiated by braking γ-quanta with 10 MeV threshold energy during 1.0·105 s at the electron beam current 22-24 μA. The helium gas pressure before opening of the HeHPC was found to be 426 bar. The synthesized black foils and other objects were observed inside the HeHPC and on the inner surfaces of the reactive chamber consisting of high purity copper (99.99), a beryllium bronze entrance window and a copper collector of chemical and nuclear reaction products. Elemental analysis using scanning electronic microscopy (SEM) and microprobe roentgen analysis (MPRA) allowed one to establish that the observed foils consist predominantly of carbon and with smaller quantities of other elements from carbon to iron. The explanation of the observed phenomena and anomalies is given on the basis of helium fusion nuclear reactions by analogy with nuclear reactions taking place in stars. The developed approach agrees well with the series of studies carried out by authors at γ-quanta influence on dense hydrogen and deuterium gases with or without presence of metals in the reactive chamber.