Abstract
The computer simulations of the angular distributions of low-Z relativistic isotopes channeled in a half-wavelength-crystal (HWC) revealed that at equal beam energy, crystal thickness and its alignment, the HWC channeling is sensitive to a mass number A of the low-Z isotope. That means, besides well-known applications of relativistic channeling for beam deflection and splitting, probably the new one is possible – light isotopes mass filter.
Highlights
A half-wavelength-crystal (HWC) is a thin crystal where a channeling particle experiences only one collision with the crystallographic plane during its penetration through the HWC, see for more details in Fig. 1 and Fig. 2 (a-c)
This experiment was not the case for HWC channeling, since: a) for this relativistic heavy ions (RHI) energy the HWC channeling may occur at a crystal thickness of order of several μm, and b) it was the case of axial channeling
The computer simulations of the angular distributions of relativistic heavy ions (RHI) channeled in a HWC demonstrated that besides the beam energy, crystal thickness and alignment, the HWC channeling is sensitive to a charge Z e and a mass number A of the ions
Summary
A half-wavelength-crystal (HWC) is a thin crystal where a channeling particle experiences only one collision with the crystallographic plane (so-called “mirroring”) during its penetration through the HWC, see for more details in Fig. 1 and Fig. 2 (a-c). The HWC channeling effect, as explained in computer simulations, is a sequence of the specific trajectories of particles, governed by the one-dimensional periodic potential of crystallographic planes. The perspective atomic physics experiments (including crystal targets) with relativistic heavy ion (RHI) beams are the part of the Super-FRS Experiment Collaboration Program [7,8] The specific of this case compared to [1,2,3,4,5] is a possibility to vary both the charge and mass of the projectile. The first successful experiment on RHI channeling at GSI [9] demonstrated the specific charge states and energy loss distributions of 300 MeV/u U-73+ ions channeled in a 120 μm thick Si crystal. Possible applications of HWC-channeling of RHI are discussed, e.g. as fragments deflectors, splitters as well as the charge Z e and mass number A filters
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