[en] Neutron activation analysis (NAA) and charged particle activation analysis (ChPAA) for the determination of more 20 chemical elements contents in the samples of drying up remainder of the thermal-mineral water was elaborated which are used in the hydro-geo-seismology for the study of the nature of element concentration change connected with the process, coming and following of powerful earthquake. The continuous observation of chemical elements in the composition of mineral water showed that Cl, Br, J, Hg, Sb, ⁴⁰K are changed strongly before the powerful earthquake and possess most strong property of the earthquake's harbinger. It is shown that the power of the earthquake are correlated with a average contents of Hg, ⁴⁰K. The considerable change of the Sb, Cr, Sc contents also are shown

[en] Routine operation of the first Egypt cyclotron has been started in Nuclear Research Center. The paper presents a history of Inshas cyclotron. The specific points of equipment installation, adjusting and putting the cyclotron into operation are described. Some data concerning the first cyclotron beam characteristics and the first experience with the cyclotron operation are shown

No abstract available

[en] Monoenergetic neutron sources are essential for many applications; e.g. radiotherapy, radiobiological studies, dosimetric studies, activation analysis, etc. In the present work, the kinematics, cross section, yield, and neutron energy spectrum of neutron producing reactions are calculated. The calculations are based on the target thickness, projectile energy, projectile energy resolution, polar and solid angles of the detector. The present calculations are carried out only for reaction channels that are producing two bodies, using the classical relativistic kinematics model. The resulting code is potentially useful for variety of applications in the nuclear and medical fields

[en] U-150 cyclotron was used: 1. For the determination of Li, B, C, N, 0, F at the level of 10^-8-10^-10 g/g in different high purity semiconductors, nonferrous metals; 2. For the investigation of chemical element distribution on the surface of the studied object with the thickness of a few micrometers; 3. For the determination of elements, which are very difficult for neutron activation analysis; 4. For the analysis of materials containing chemical elements having high cross sections of capture of thermal neutrons; 5. For the application of fast neutron flow in activation analysis for the determination of N, F, Al, Si, P and other elements

[en] The description of the main systems of modified heavy ion accelerator U-400 of the Flerov Laboratory of Nuclear Reactions is presented including the ECR ion source, system of external injection of low energy ions onto median plane. The characteristic parameters for obtaining of accelerated heavy ions from krypton ions to more heavier ones also are presented. The structure and parameters of new beam line and vacuum chamber for irradiation of polymeric and other materials on modified cyclotron U-400 are presented too. The new possibilities for the production of unique track membrane are discussed

[en] Existing experimental data on the sputtering of coarse-grained metals by swift heavy ions is reviewed. Inelastic energy losses of ions have been noted to influence the sputtering yield of metals, but this effect is negligible. Experiments have shown that the sputtering yield of coarse-grained metals by swift heavy ions increases by factor 102-103 at high irradiation fluences, but at the expense of accumulating radiation defects in the crystalline structure of the target. Similar experiments for the design and development of heavy ion accelerators and for the use of swift heavy ions in materials processing for implantation of deep-buried layers are also important

[en] Target activity investigation was carried out to provide recommendation on the utilizing of the target in regularly iodine-123 production via p,n reaction. It was found out that the main activity comes from the aurum isotopes produced in platinum backing and from tellurium isomers Te ^123m and Te^121m. At periodic irradiations there are different contributions to the total activity from tellurium dioxide and from separate backing isotopes depending on the frequency of irradiations. When the target is cooling for more than 6 weeks its activity is being determined by Au¹⁹⁵ and Te^123m

[en] A method, based on anion exchange chromatography, is presented for the isolation of ¹³⁹Ce after production by a proton-induced nuclear reaction on a thick praseodymium target. After bombardment the target is dissolved in nitric acid and ¹³⁹Ce oxidised to the Ce(IV) oxidation state with bromic acid. ¹³⁹Ce is then separated form the praseodymium by anion exchange chromatography on a Ag MP-1 resin column in a nitric acid - bromic acid mixture. ¹³⁹Ce is sorbed onto the resin column and praseodymium eluted with the acid mixture. The bromic acid is washed out of the column with nitric acid and ¹³⁹Ce finally eluted with dilute nitric acid containing sulphur dioxide

[en] One-dimensional model for the dispersion of passive atmospheric contaminant (not included chemical reactions) in the atmospheric boundary layer is considered. On the basis of the gradient transfer theory (K-theory), the time dependent diffusion equation represents the dispersion of the pollutants is solved analytically. The solution depends on diffusion coefficient K', which is expressed in terms of the friction velocity 'u the vertical coordinate -L and the depth of the mixing layer 'h'. The solution is obtained to either the vertical coordinate 'z' is less or greater than the mixing height 'h'. The obtained solution may be applied to study the atmospheric dispersion of pollutants