Navegação Ciências Exatas e da Terra por Autor "Arista, Nestor"
Resultados 1-11 de 11
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Contribution of close collisions to the Barkas effect : the classical picture
(2004) [Artigo de periódico]According to a previous estimation made by Lindhard [Nucl. Instrum. Method Phys. Res. 132, 1 (1976)] on the basis of qualitative arguments and dimensional analysis, the contribution of close collisions to the Barkas effect ... -
Electronic energy loss of channeled ions : the giant Barkas effect
(2004) [Artigo de periódico]In this work we have measured the electronic energy loss of ⁹Be and ¹¹B ions for the ‹100› and ‹110› directions in Si as a function of the incident ion energy. The channeling measurements cover a wide energy range between ... -
Energy loss of helium ions in zinc
(2004) [Artigo de periódico]The energy loss of helium ions in zinc has been measured in the energy range from 37.5 to 1750 keV/amu using the transmission technique and the Rutherford backscattering method. In addition, calculations using the extended ... -
Energy loss of proton, [alpha] particle, and electron beams in hafnium dioxide films
(2009) [Artigo de periódico]The electronic stopping power, S, of HfO₂ films for proton and alpha particle beams has been measured and calculated. The experimental data have been obtained by the Rutherford backscattering technique and cover the range ... -
Experimental and theoretical study of the energy loss of Be and B ions in Zn
(2009) [Artigo de periódico]Energy-loss measurements and theoretical calculations for Be and B ions in Zn are presented. The experimental ion energies range from 40 keV/u to 1 MeV/u, which includes the energy-loss maximum and covers a lack of ... -
Experimental and theoretical study of the energy loss of C and O in Zn
(2011) [Artigo de periódico]We present a combined experimental-theoretical study of the energy loss of C and O ions in Zn in the energy range 50–1000 keV/amu. This contribution has a double purpose, experimental and theoretical. On the experimental ... -
Experimental energy straggling of protons in SiO/sub 2/
(2003) [Artigo de periódico]The energy straggling of proton beams in SiO₂ has been measured in the energy range from 30 to 1500 keV using the transmission, nuclear reaction analysis and Rutherford backscattering techniques. The experimental results ... -
Ground- and excited-state scattering potentials for the stopping of protons in an electron gas
(2019) [Artigo de periódico]The self-consistent electron–ion potential V(r) is calculated for H+ ions in an electron gas system as a function of the projectile energy to model the electronic stopping power for conduction-band electrons. The results ... -
Nonlinear stopping effects of slow ions in a no-free-electron system : titanium nitride
(2019) [Artigo de periódico]A recent experimental study of the energy losses of various ions in titanium nitride, in the low-energy range [M.A.Sortica et al. , Sci. Rep. 9 , 176 ( 2019 )], showed a striking departure of the measured values from those ... -
Signature of plasmon excitations in the stopping ratio of fast hydrogen clusters
(2008) [Artigo de periódico]In the present work, we have explored the interference effects which arise when H2 + and H3 + cluster ions interact with a thin layer of SiO2 in order to obtain a clear signature of plasmon excitations induced by these ... -
Stopping power of cluster ions in a free-electron gas from partial-wave analysis
(2018) [Artigo de periódico]A nonlinear model for the stopping power of cluster ions based on partial-wave analysis is developed through the generalization of the induced density approach (IDA) model for the interaction of homo-and heteronuclear ...
