http://dspace.nbuv.gov.ua:80/handle/123456789/74123 2026-04-17T02:26:13Z 2026-04-17T02:26:13Z Dikiy, N.P. Sayenko, S.Yu. Uvarov, V.L. Shevyakova, E.P. http://dspace.nbuv.gov.ua:80/handle/123456789/82493 2015-06-01T00:01:58Z 2000-01-01T00:00:00Z

Application of nuclear-physics methods for studying the radionuclide transport in granite rocks Dikiy, N.P.; Sayenko, S.Yu.; Uvarov, V.L.; Shevyakova, E.P. The results of studying the migration of 169Yb as actinide-simulator in granite specimens in pristine state and preliminary irradiated with various γ-irradiation dose up to 3,0*109 rad are represented and briefly discussed. Method of γ-spectrometry was used in order to determine the distribution of γ-emitting tracer isotope 169Yb in granite. Estimations based on analysis of ytterbium bulk distribution are given to determine the diffusion coefficients of radionuclides in granite rock.

2000-01-01T00:00:00Z Dikiy, N.P. Sayenko, S.Yu. Uvarov, V.L. Shevyakova, E.P. http://dspace.nbuv.gov.ua:80/handle/123456789/82492 2015-06-01T00:01:57Z 2000-01-01T00:00:00Z

Application of nuclear-physics methods for studying the radionuclide transport in granite rocks Dikiy, N.P.; Sayenko, S.Yu.; Uvarov, V.L.; Shevyakova, E.P. The results of studying the migration of ¹⁶⁹Yb as actinide-simulator in granite specimens in pristine state and preliminary irradiated with various γ-irradiation dose up to 3,0*10⁹ rad are represented and briefly discussed. Method of γ-spectrometry was used in order to determine the distribution of γ-emitting tracer isotope ¹⁶⁹Yb in granite. Estimations based on analysis of ytterbium bulk distribution are given to determine the diffusion coefficients of radionuclides in granite rock.

2000-01-01T00:00:00Z Mytsykov, A.O. http://dspace.nbuv.gov.ua:80/handle/123456789/82287 2015-05-28T00:02:12Z 2000-01-01T00:00:00Z

Calculation of geometric parameters of a magnetic quadrupole lens working near to saturation Mytsykov, A.O. The method for defining basic geometric parameters of precision quadrupole lenses is offered. The method allows one to obtain the field of working area differing from required one less than by 10⁻⁴ compared with the basic component. The lens shape is described by 2 parameters. The method allows taking into account the field distortions caused by saturation of iron. Moreover, it is possible to calculate lenses with a complicated multipolar structure including the forbidden field harmonics. The paper contains the results of calculations for lense shapes used in actual installations.

2000-01-01T00:00:00Z Ayzatsky, N.I. http://dspace.nbuv.gov.ua:80/handle/123456789/82286 2015-05-31T19:08:18Z 2000-01-01T00:00:00Z

Analytical solutions in the two-cavity coupling problem Ayzatsky, N.I. Analytical solutions of precise equations that describe the rf-coupling of two cavities through a coaxial cylindrical hole are given for various limited cases. For their derivation we have used the method of solution of an infinite set of linear algebraic equations, based on its transformation into dual integral equations.

2000-01-01T00:00:00Z