| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000390397 |
| ISSN: | 0103-9733 |
| Authors: | Barros, A. L. F. de1 Mejía, C2 Morgado, W.A.M2 Almeida, L.F1 Silveira, E.F. da2 |
| Institutions: | 1Centro Federal de Educacao Tecnologica Celso Suckow da Fonseca, Departamento de Fisica, Rio de Janeiro. Brasil 2Pontificia Universidade Catolica do Rio de Janeiro, Departamento de Fisica, Rio de Janeiro. Brasil |
| Year: | 2015 |
| Season: | Abr |
| Volumen: | 45 |
| Number: | 2 |
| Pages: | 195-199 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English 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 |
| Disciplines: | Física y astronomía |
| Keyword: | Física atómica y molecular, Rayos cósmicos, Ionización de moléculas, Modelado |
| Keyword: | Physics and astronomy, Atomic and molecular physics, Cosmic rays, Molecules ionization, Modelling |
| Full text: | Texto completo (Ver PDF) |
