Determination of atom displacement distribution in YBCO superconductors induced by gamma radiation

✍ Scribed by Piñera, I. ;Cruz, C. M. ;Abreu, Y. ;Leyva, A.

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 489 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200622155

✦ Synopsis

Abstract

The calculation results of the atom displacement distribution induced by gamma radiation in the superconducting material YBa~2~Cu~3~O~7–x~ are presented. Firstly, a direct calculation procedure for the atom displacement distribution inside a given material is introduced, starting from the application of the energy flux distribution values of secondary electrons, formerly calculated using the Monte Carlo method based code system MCNP‐4C. Finally, calculation results of the atom displacement distribution, regarding the occupied oxygen crystalline sites, are presented for different incident gamma radiation energies, where an atom displacement threshold energy value of 20 eV was assigned to O(1–3) sites, while a value of 3.45 eV was used for the copper–oxygen chain sites at the basal plane. According to the present calculations, a predominating atom displacement rate at copper‐oxygen chain sites was obtained. On the other hand, nearly linear correlations among atom displacements and energy deposition profiles were also found. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)