The Effect of Anharmonic Potential on the Planar Channeling Radiation of Positrons in the Disordered fcc Single Crystals | ||||
| Egyptian Journal of Solids | ||||
| Article 2, Volume 27, Issue 1, 2004, Page 9-24 PDF (148.84 K) | ||||
| DOI: 10.21608/ejs.2004.149302 | ||||
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| Abstract | ||||
| Planar channeling radiation characteristics like, transition energies and transition probabilities were investigated against the planar channeling potential with higher anharmonic terms. The calculations have been performed, by using first-order perturbation theory, to fcc single crystals the lattices and disordered lattices by dumb-bell configuration (DBC) or by body-centered interstitial (BCI) , and has been executed for relativistic positrons at energies (10 - 500) MeV channeled in copper single crystal in the planar direction (100). It has been found that, by using higher anharmonic terms in the channeling potential, a new transition line at Δ n = ± 5. has been detected. In addition, the calculations showed that, the effect of higher anharmonic terms on channeling radiation characteristics is very significant for transitions at higher bound states, and the significance decreases for transitions at lower bound states. | ||||
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