Investigation of proton channeling using nuclear-reaction resonances
National Science Center “Kharkiv Institute of Physics and Technology", Akademicheskaya St. 1, 61108, Kharkiv, Ukraine
2 National University named by V.N. Karazin, Svoboda sq. 4, 61077, Kharkiv, Ukraine
Accepted: 6 September 2006
Published online: 25 September 2006
To investigate orientation effects, an approach based on the measurements of γ-ray yields following the excitation of “narrow" isolated resonances in the reactions occurring on the nuclei of interstitial impurity atoms, that occupy certain positions in a crystal, has been proposed. The carbon atoms were shown to be located in octahedral interstitial sites of the Re-0.4 at. % 13C monocrystalline solution. The proton flux distribution in the (0001) channel was investigated via the 1.7476 MeV resonance of the 13C(p,γ)14N reaction. Some particular qualities of the reaction yield were found to be dependent upon the proton energy. The method of measurement of the electronic stopping power of channeled particles has been deduced. The γ-ray yield of the resonance reactions induced by the channeled protons was shown to be dependent on the amplitude of the thermal vibrations of carbon atoms.
PACS: 24.30.-v Resonance reactions – / 61.85.+p Channeling phenomena (blocking, energy loss, etc.) – / 68.55.Jk Structure and morphology; thickness; crystalline orientation and texture – / 02.70.Uu Applications of Monte Carlo methods –
© Società Italiana di Fisica and Springer-Verlag, 2006