0000000000082461

AUTHOR

V Kyllönen

showing 4 related works from this author

Stopping powers of havar and effective charge for 1.4–3.2 MeV/u 127I-ions

2000

Abstract Stopping powers of havar for 1.4–3.2 MeV/u 127 I-ions have been determined by the transmission technique using two geometrical arrangements. No previous data have been published for havar with this ion. The experimental data are compared with predictions obtained by using Bragg’s additivity rule with various parametrizations of the stopping power found in the literature. The values obtained by the parametrizations underestimate the experimental data by 5–11%. The empirical correction scheme of Thwaites yields values in rather good agreement with the present results, especially at energies above 1.9 MeV/u. The effective charges of the 127 I ions were also deduced from the experiment…

Nuclear physicsNuclear and High Energy PhysicsChemistryEmpirical correctionStopping power (particle radiation)Atomic physicsInstrumentationEffective nuclear chargeIonNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Annealing behaviour of aluminium-implanted InP

2000

The annealing behaviour of aluminium has been studied in single-crystal InP implanted with 40 and 120 keV 27Al+ ions. The implantation doses were 1 x 1015 and 1 x 1016 cm-2. The aluminium concentration profiles were determined by two techniques, Secondary ion mass spectrometry (SIMS) and the nuclear resonance broadening technique (NRB) which was used for checking purposes. The usability of the SIMS technique for profiling Al rich layers was studied. Significant inconsistencies were observed in the SIMS profiles with the high dose implanted samples. The 120 keV, 1 x 1016 cm-2 implanted samples were subject to annealing in argon atmosphere in the temperature range 380–600°C. Redistribution an…

010302 applied physicsNuclear and High Energy PhysicsMaterials scienceAnnealing (metallurgy)Analytical chemistrychemistry.chemical_element02 engineering and technologyActivation energyAtmospheric temperature range021001 nanoscience & nanotechnology01 natural sciencesSpectral lineIonSecondary ion mass spectrometryIon implantationchemistryAluminium0103 physical sciences0210 nano-technologyInstrumentationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Slowing down of 1.3–3.5 MeV/u Fe, Kr and I ions in ten metals

2000

Abstract Stopping powers for 1.3–3.5 MeV/u 56 Fe, 80, 84 Kr and 127 I ions in Mg, V, Fe, Co, Ni, Cu, Nb, Sn, Ta and Au have been determined by a transmission technique exposing the metallic sample foils to the direct ion beam. No previous data have been published for Mg, V, Fe, Co, Nb, Sn or Ta stopping media with these ion energies. The experimental results are compared with parametrizations of the stopping powers found in the literature (SRIM-2000 and Hubert’s parametrization). Discrepancies as high as 21 and 16% are observed for SRIM and Hubert’s parametrization, respectively. However, there is agreement between the present results and other experimental data available at corresponding i…

MetalEnergy lossRadiationIon beamChemistryvisual_artvisual_art.visual_art_mediumAnalytical chemistryStopping power (particle radiation)Atomic physicsIonRadiation Physics and Chemistry
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Stopping powers of havar for 1.6, 2.3 and 3.2 MeV/u heavy ions

2000

Abstract Stopping powers of havar for 28,30 Si-, 36 Ar-, 54,56 Fe- and 80,84 Kr-ions with energies of 1.6, 2.3 and 3.2 MeV/u have been determined by a transmission technique. Sample foils are exposed to the direct beams. No previous data for havar with these ions have been published. The obtained results are brought together with literature havar data for 1 H-, 4 He-, 7 Li-, 11 B-, 12 C-, 14 N-, 16 O- and 127 I-ions at the same ion velocity. The experimental data are compared with the values predicted by the SRIM-2000 parametrization using Bragg’s rule. A systematic underestimation, by 6–23%, of the experimental stopping powers was observed. The empirical correction scheme of Thwaites has b…

Nuclear physicsNuclear and High Energy PhysicsChemistryEmpirical correctionStopping power (particle radiation)Atomic physicsInstrumentationParametrizationEffective nuclear chargeIonNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
researchProduct