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A Simple Model for Ice Compaction Data Induced by Low Energy Ion Irradiation

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Abstract

A connection between the compaction of amorphous solid water (ASW) during energetic ion irradiation and the disappearing of water dangling bonds (OH-db) has been analyzed particularly by the Palumbo et al. and by Baragiola et al. In this work, a further discussion of the process for inducing the compaction is presented. Simple models for OH-db evolution for irradiated water ice are discussed. Literature results on the OH-db disappearance in ices bombarded by 100–200 keV H+ ions and on the comparison of porosity and OH-db results for 200 keV Ar+ ions are revisited. It is observed that for both, porosity decrease (compaction) and OH-db absorption signal decrease, experimental data can be well fitted by the sum of two decreasing exponentials with similar sets of parameters. Although a clear explanation for this correlation cannot be extracted, it suggests strongly that compaction and OH-db destruction are both triggered by two different processes.

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Acknowledgments

The authors thank the Brazilian foundations CNPq (INEspaço), FAPERJ and CAPES for the financial support.

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Authors and Affiliations

  1. Departamento de Física, Centro Federal de Educação Tecnológica Celso Suckow da Fonseca -CEFET/RJ, Av. Maracanã 229, Rio de Janeiro, RJ, 20271-110, Brazil

    A. L. F. de Barros & L. F. Almeida

  2. Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, Rio de Janeiro, RJ, 22453-900, Brazil

    C. Mejía, W. A. M. Morgado & E. F. da Silveira

Authors
  1. A. L. F. de Barros
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  2. C. Mejía
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  3. W. A. M. Morgado
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  4. L. F. Almeida
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  5. E. F. da Silveira
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Correspondence to A. L. F. de Barros.

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de Barros, A.L.F., Mejía, C., Morgado, W.A.M. et al. A Simple Model for Ice Compaction Data Induced by Low Energy Ion Irradiation. Braz J Phys 45, 195–199 (2015). https://doi.org/10.1007/s13538-015-0305-3

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  • DOI: https://doi.org/10.1007/s13538-015-0305-3

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