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dc.contributor.author
Colognesi, D.  
dc.contributor.author
Barrera, Gustavo Daniel  
dc.contributor.author
Ramirez Cuesta, A.J.  
dc.contributor.author
Zoppi, M.  
dc.date.available
2020-04-06T20:46:17Z  
dc.date.issued
2007-01  
dc.identifier.citation
Colognesi, D.; Barrera, Gustavo Daniel; Ramirez Cuesta, A.J.; Zoppi, M.; Hydrogen self-dynamics in orthorhombic alkaline earth hydrides through incoherent inelastic neutron scattering; Elsevier Science Sa; Journal of Alloys and Compounds; 427; 1-2; 1-2007; 18-24  
dc.identifier.issn
0925-8388  
dc.identifier.uri
http://hdl.handle.net/11336/102102  
dc.description.abstract
Inelastic neutron scattering patterns from polycrystalline CaH2, SrH2 and BaH2, measured on TOSCA-II spectrometer at low temperature in the energy transfer range 3 meV < E < 500 meV are reported. From the medium-energy regions, coinciding with optical phonon bands, high-quality generalized self-inelastic structure factors are extracted and compared to new ab initio lattice dynamics simulations, accurately reproducing the hydride lattice structures. The overall agreement is found satisfactory, even though not perfect, especially in the first optical phonon zone of BaH2. In addition, the simulations provide a compelling support to a recent physical interpretation of the recorded spectral features and allowed to separate the contributions produced by the two non-equivalent hydrogen atoms.2, SrH2 and BaH2, measured on TOSCA-II spectrometer at low temperature in the energy transfer range 3 meV < E < 500 meV are reported. From the medium-energy regions, coinciding with optical phonon bands, high-quality generalized self-inelastic structure factors are extracted and compared to new ab initio lattice dynamics simulations, accurately reproducing the hydride lattice structures. The overall agreement is found satisfactory, even though not perfect, especially in the first optical phonon zone of BaH2. In addition, the simulations provide a compelling support to a recent physical interpretation of the recorded spectral features and allowed to separate the contributions produced by the two non-equivalent hydrogen atoms.E < 500 meV are reported. From the medium-energy regions, coinciding with optical phonon bands, high-quality generalized self-inelastic structure factors are extracted and compared to new ab initio lattice dynamics simulations, accurately reproducing the hydride lattice structures. The overall agreement is found satisfactory, even though not perfect, especially in the first optical phonon zone of BaH2. In addition, the simulations provide a compelling support to a recent physical interpretation of the recorded spectral features and allowed to separate the contributions produced by the two non-equivalent hydrogen atoms.2. In addition, the simulations provide a compelling support to a recent physical interpretation of the recorded spectral features and allowed to separate the contributions produced by the two non-equivalent hydrogen atoms.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science Sa  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Metal hydrides  
dc.subject
Neutron scattering  
dc.subject
Lattice dynamics  
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica  
dc.subject.classification
Ciencias Químicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Hydrogen self-dynamics in orthorhombic alkaline earth hydrides through incoherent inelastic neutron scattering  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2020-04-06T16:12:01Z  
dc.journal.volume
427  
dc.journal.number
1-2  
dc.journal.pagination
18-24  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Colognesi, D.. Consiglio Nazionale delle Ricerche; Italia  
dc.description.fil
Fil: Barrera, Gustavo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Comodoro; Argentina  
dc.description.fil
Fil: Ramirez Cuesta, A.J.. Rutherford Appleton Laboratory; Reino Unido  
dc.description.fil
Fil: Zoppi, M.. Consiglio Nazionale delle Ricerche; Italia  
dc.journal.title
Journal of Alloys and Compounds  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0925838806003082  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jallcom.2006.03.031