Effect of temperature on transmission of planar channeled positrons in cubic metals containing point defects

Computational Study on Characteristic Radiation Originated from Channeled Relativistic Electrons in Single-Wall Carbon Nanotubes

“…(5) at different values of electron energy (10,15,20,25,50,100,200,and500MeV) The calculations show that the estimation of the maximum number of bound states of the channeled electron for both armchair chiral, and zigzag nanotube at low incident energy are found to be n max approximately equal. While at high incident energy are found to be n max for armchair type n max (10,10) > n max (8,8) > n max (5,5),also n max for Chiral n max (15,6) > n max (16,4) > n max (11,9) n max (11,5) > n max (8,2) ,and n max for zigzag n max (18,0) > n max (10,0) > n max (8,0) n max (6,0) these results shows that the maximum number of bound states of the channeled electron for both armchair chiral, and zigzag nanotube at high incident energy are increase with increasing of single wall carbon nanotubes radii and ,the relation between the maximum number of bound states, n max of the channeled electrons as a function of the nanotube radius at different incident energies (50, 100, and 500) MeV are shown in Figs. 1, 2,and 3 respectively.…”

“…In previous work, the channeling of negatively charged particles in disordered lattices of cubic crystals including the characteristics of channeling radiation that emits spontaneously of the channeled electrons [1] in addition to the calculations of the transmission and dechanneling coefficients in disordered lattices was considered [2]. The first theoretical study of particle channeling in CNTs showed those relativistic positrons and electrons can emit, respectively, quasimonochromatic hard X-rays and γ-rays when channeled in CNTs.…”

Energy Spectrum of Relativistic Electrons Channeled Through Single-Wall Carbon Nanotubes

“…We use the WKB method [14], to obtain the energy eigenvalues of the channeled positrons constrained to move between classical turning points ρ1 and ρ2 in a potential given by Eq. (6)…”

“…Channeling effect has found several important applications [2]. In our previous work, special consideration is devoted to the channeling of positively charged particles in disordered lattices of cubic crystals including the characteristics of channeling radiation that emits spontaneously due to transitions between eigenstates of the channeled positrons [3] in addition to calculations of the transmission and dechanneling coefficients in disordered lattices, [4][5][6][7].…”