Isomers production in 238U photofission

The fission process induced by gamma quanta up to 25 MeV energy on 238U was analyzed. Experimental observables as cross sections, fragments mass distribution yields of some nuclides of interest and average prompt neutrons multiplicity characterizing 238U photofission process were theoretically evaluated using TALYS 1.9 software. Theoretical evaluations of isomer ratios using Talys supplied by author’s own code as well as experimental isomer ratios obtained at MT - 25 Microtron are presented

The interrelation of environmental and social factors and man’s mental health

The authors focus on the issues of the influence of socio-environmental factors on human health in the article. A number of socio-environmental issues are considered in the context of sustainable psychological development. The issues of demography and socio-hygienic monitoring are also touched upon. The ways of further development of scientific research in the direction of human ecology have been determined. The conclusions have been drawn that there is a need to apply a systematic approach to identify potentially hazardous factors, to establish their influence levels, to comprehensively analyze the significance of these impacts, and ensure the solution of complex problems in the field of prevention of human health disorders. © Foundation Environmental Protection & Research-FEPR

Cross section measurements of 151^{151}Eu(3^3He,5n) reaction: new opportunities for medical alpha emitter 149^{149}Tb production

Method for production of alpha emitter $^{149}$Tb by irradiation of $^{151}$Eu with 70MeV $^3$He nuclei is proposed. For the frst time, the cross sections for the formation of isotopes $^{149,150,151,152}$Tb were measured experimentally using a stack foil technique in the $^3$He particles energy range 70→12 MeV. The thick target yield of $^{149}$Tb is 39 MBq/μAh, or 230 MBq/μA $^{149}$Tb at saturation. The optimal energy range from the point of view of radioisotopic purity is 70→40MeV. At these conditions about 150 MBq/μA $^{149}$Tb can be produced in 8hours irradiation, which is sufcient for therapeutic applications. The main impurities are $^{150}$Tb (~100% in activity) and $^{151}$Tb (~30% in activity). The proposed method surpasses its counterparts by the high content of the target isotope in the natural mixture and the simplicity of the radiochemical separation of $^{149}$Tb from the bulk target material