Proton channeling through long chiral carbon nanotubes: The rainbow route to equilibration

Angular distributions of high energy protons channeled in long (10,10) single-wall carbon nanotubes

“…It is interesting to compare the results presented here with the ones presented in our previous work on channeling of 1 GeV protons in long (11,9) SWCNTs [21]. The concentric circular ridges in the angular distribution of channeled protons in the (10, 10) case correspond to the rings in the angular distributions in the (11,9) case.…”

“…it is a consequence of a correlated series of collisions of ion with the atoms in the atomic strings. We employ the continuum approximation [22], and use Molière's expression for the proton-nanotube atom interaction potential [18][19][20][21],…”

“…Recently, Petrović et al [21] investigated channeling of 1 GeV protons in long (11,9) SWCNTs. They showed that the angular distributions of channeled protons were characterized by a ring structure, with the number of rings increasing and the average distance between them decreasing in a regular and predictable way when the nanotube length increases.…”

Channeling of protons in various types of radially compressed carbon nanotubes

“…We examined 10 MeV monoenergetic proton beam channeled in radially compressed nanotubes at the centre of their axis and at both ends (6,4) and (11,9) SWCNTs of various lengths. The radii of these nanotubes are 0.341 and 0.679 nm, respectively, calculated with the use of more accurate value of length of the bond between the carbon atoms mentioned above.…”

“…Channeling effect of charged particles in crystals has been studied for many years (see for example [7]), and lately even in laser fields [8]. Theoretical investigation of charged particles channeling in CNTs has produced several interesting results [9][10][11], which concern straight nanotubes. Recent studies have shown that they can undergo axial and radial compression [12], and this way it is feasible to obtain carbon nanotubes that are radially compressed at one end, that will resemble truncated nanocones.…”