Kinetics of amorphization induced by swift heavy ions in α-quartz

Peña Rodríguez, Ovidio Y. and Manzano Santamaría, Javier and Rivera de Mena, Antonio and García, Gastón and Olivares Villegas, José and Agullo Lopez, Fernando (2012). Kinetics of amorphization induced by swift heavy ions in α-quartz. "Journal of Nuclear Materials", v. 430 (n. 1-3); pp. 125-131. ISSN 0022-3115. https://doi.org/10.1016/j.jnucmat.2012.07.001.

Description

Title: Kinetics of amorphization induced by swift heavy ions in α-quartz
Author/s:
  • Peña Rodríguez, Ovidio Y.
  • Manzano Santamaría, Javier
  • Rivera de Mena, Antonio
  • García, Gastón
  • Olivares Villegas, José
  • Agullo Lopez, Fernando
Item Type: Article
Título de Revista/Publicación: Journal of Nuclear Materials
Date: November 2012
ISSN: 0022-3115
Volume: 430
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Nuclear [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (3MB) | Preview

Abstract

The kinetics of amorphization in crystalline SiO2 (α-quartz) under irradiation with swift heavy ions (O+1 at 4 MeV, O+4 at 13 MeV, F+2 at 5 MeV, F+4 at 15 MeV, Cl+3 at 10 MeV, Cl+4 at 20 MeV, Br+5 at 15 and 25 MeV and Br+8 at 40 MeV) has been analyzed in this work with an Avrami-type law and also with a recently developed cumulative approach (track-overlap model). This latter model assumes a track morphology consisting of an amorphous core (area σ) and a surrounding defective halo (area h), both being axially symmetric. The parameters of the two approaches which provide the best fit to the experimental data have been obtained as a function of the electronic stopping power Se. The extrapolation of the σ(Se) dependence yields a threshold value for amorphization, Sth ≈ 2.1 keV/nm; a second threshold is also observed around 4.1 keV/nm. We believe that this double-threshold effect could be related to the appearance of discontinuous tracks in the region between 2.1 and 4.1 keV/nm. For stopping power values around or below the lower threshold, where the ratio h/σ is large, the track-overlap model provides a much better fit than the Avrami function. Therefore, the data show that a right modeling of the amorphization kinetics needs to take into account the contribution of the defective track halo. Finally, a short comparative discussion with the kinetic laws obtained for elastic collision damage is given.

More information

Item ID: 15613
DC Identifier: http://oa.upm.es/15613/
OAI Identifier: oai:oa.upm.es:15613
DOI: 10.1016/j.jnucmat.2012.07.001
Official URL: http://www.sciencedirect.com/science/article/pii/S0022311512003601
Deposited by: Memoria Investigacion
Deposited on: 08 Dec 2013 14:16
Last Modified: 30 May 2017 16:03
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM