On the exciton model for ion-beam damage: The example of TiO2

Rivera de Mena, Antonio and Crespillo Almenara, Miguel and Olivares Roza, Jimena and Sanz, R. and Jensen, J. and Agullo Lopez, Fernando (2010). On the exciton model for ion-beam damage: The example of TiO2. In: "15th International Conference on Radiation Effects in Insulators (REI)", 30/08/2009 - 04/09/2009, Padova, Italia. ISBN ISSN 0168-583X.

Description

Title: On the exciton model for ion-beam damage: The example of TiO2
Author/s:
  • Rivera de Mena, Antonio
  • Crespillo Almenara, Miguel
  • Olivares Roza, Jimena
  • Sanz, R.
  • Jensen, J.
  • Agullo Lopez, Fernando
Item Type: Presentation at Congress or Conference (Article)
Event Title: 15th International Conference on Radiation Effects in Insulators (REI)
Event Dates: 30/08/2009 - 04/09/2009
Event Location: Padova, Italia
Title of Book: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. Proceedings of the 15th International Conference on Radiation Effects in Insulators (REI)
Date: October 2010
ISBN: ISSN 0168-583X
Volume: 268, I
Subjects:
Freetext Keywords: Damage; Excitons; Ion beams; Rutile; RBS/C; Channelling amorphization threshold
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Electrónica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The non-radiative exciton decay model recently developed to account for swift-ion-beam damage to LiNbO3 is, here, discussed within a general physical perspective, taking previous work on alkali halides as a reference. Some general rules for the validity of excitonic models have been put forward, allowing one to predict the irradiation behaviour of other materials. As a new example of application, some preliminary data on the generation and growth of uniform amorphous layers induced by irradiation with Br at 13 MeV and 25 MeV have been performed on rutile (TiO2). In addition sub-threshold irradiations with Br ions at 9 MeV have been carried out. Defects generation is observed as a result. This effect is explained with the exciton model. Experiments are in the electronic excitation regime and use moderate fluences in the range of 6 × 1012 to 1.5 × 1014 cm−2. The results show similar features to those found for LiNbO3 and are, in principle, consistent with a non-radiative exciton decay model.

More information

Item ID: 8485
DC Identifier: http://oa.upm.es/8485/
OAI Identifier: oai:oa.upm.es:8485
Official URL: http://www.sciencedirect.com/science/journal/0168583X
Deposited by: Memoria Investigacion
Deposited on: 15 Jul 2011 08:32
Last Modified: 23 Oct 2014 05:11
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