Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

Full text (ua)

A. B. Demchyshyn, P. O. Selyshchev

Kyiv Taras Shevchenko National University, Kyiv, Ukraine

Abstract: Formation of the extensive structures from separate tracks depending on the characteristics of projectile beam and on parameters of the swift heavy ions induced tracks are theoretically modeled in this paper. The paper considers tracks like a chain of deal spherical regions; it was assumed that each incident ion creates one such chain. The dependence of the surface area of the sample after exposure and removal of the modified substance from the irradiation dose, and the incidence beam angle of heavy swift ions and from the average distance between one track's spherical parts is found. Calculations were made using Monte Carlo method. With the irradiation angle increasing dose curve convex most strongly varies. It was established that the angular dependence of the surface area of the branched structure formed by the overlapping areas of track has a maximum value at certain "critical" angle of ions incidence (at fixed dose), which depends on the distance between the spherical regions in the track.

Keywords: track, branched structures, fast heavy ions, the Monte Carlo method, the angle of irradiation, irradiation dose.

1. Ferain E., Legras R. Pore shape control in nanoporous particle track etched membrane. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 174 (2001) 116. https://doi.org/10.1016/S0168-583X(00)00455-9

2. Kanjilal D. Swift heavy ion-induced modification and track formation in materials. Current Science C 80 (2001) 1560.

3. Reimar Spohr. Status of ion track technology - Prospects of single tracks. Radiation Measurements 40 (2005) 191. https://doi.org/10.1016/j.radmeas.2005.03.008

4. Wang Z. G., Dufour Ch., Cabeau B. et al. Velocity effect on the damage creation in metals in the electronic stopping power regime. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 107 (1996) 175. https://doi.org/10.1016/0168-583X(95)00851-9

5. Herre O., Wesch W., Wendler E. Formation of discontinuous tracks in single-crystalline InP by 250-MeV Xe-ion irradiation. Phys. Rev. B 58 (1998) 4832. https://doi.org/10.1103/PhysRevB.58.4832

6. Комаров Ф. Ф. Дефектообразование и трекообразование в твердых телах при облучении ионами сверхвысоких энергий. Усп. физ. наук 173 (2003) 1304.

7. Houpert Ch. et al. Transition from localized defects to continuous latent tracks in magnetic insulators irradiated by high energy heavy ions: A HREM investigation. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 39 (1989) 720. https://doi.org/10.1016/0168-583X(89)90882-3

8. Meftah A., Brisard F., Costantini J. M. et al. Swift heavy ions in magnetic insulators: A damage-cross-section velocity effect. Physical Review B 48 (1993) 920. https://doi.org/10.1103/PhysRevB.48.920

9. Gaiduk P. I., Nylandsted Larsen A. et al. Discontinuous tracks in arsenic-doped crystalline Si_0.5Ge_0.5 alloy layers. Phys. Rev. B 66 (2002) 045316. https://doi.org/10.1103/PhysRevB.66.045316

10. Wiss T., Matzke Hj., Rondinella V. V. et al. Damage produced in magnesium aluminate spinel by high energy heavy ions including fission products of fission energy: microstructure modifications. Progress in Nuclear Energy 38 (2001) 281. https://doi.org/10.1016/S0149-1970(00)00118-9

11. Демчишин А. Б., Дідик А. Ю., Селищев П. О. Моделирование образования структуры областей видоизмененного вещества при формировании тяжелыми ионами высоких энергий сферических треков. Вопросы атомной науки и техники 1 (2010) 3.