Effects of neutron irradiation on polycrystalline Mg11B2 (Articolo in rivista)

Type
Label
  • Effects of neutron irradiation on polycrystalline Mg11B2 (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.73.134518 (literal)
Alternative label
  • C. Tarantini; H. U. Aebersold; V. Braccini; G. Celentano; C. Ferdeghini; V. Ferrando; U. Gambardella; F. Gatti; E. Lehmann; P. Manfrinetti; D. Marré; A. Palenzona; I. Pallecchi; I. Sheikin; A. S. Siri; M. Putti (2006)
    Effects of neutron irradiation on polycrystalline Mg11B2
    in Physical review. B, Condensed matter and materials physics (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • C. Tarantini; H. U. Aebersold; V. Braccini; G. Celentano; C. Ferdeghini; V. Ferrando; U. Gambardella; F. Gatti; E. Lehmann; P. Manfrinetti; D. Marré; A. Palenzona; I. Pallecchi; I. Sheikin; A. S. Siri; M. Putti (literal)
Pagina inizio
  • 134518 (literal)
Pagina fine
  • 134518 (literal)
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  • 73 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 11 (literal)
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  • 1INFM-LAMIA/CNR, Dipartimento di Fisica, Via Dodecaneso 33, 16146 Genova, Italy 2Paul Scherrer Institut, Deptm.Spallation Neutron Source SINQ, CH-5232 Villigen, Switzerland 3Superconductivity Section, ENEA Research Center, Via E. Fermi 65, Frascati, 00044, Italy 4INFN Frascati National Laboratory, Via E. Fermi 40, Frascati, 00044, Italy 5Dipartimento di Fisica, Via Dodecaneso 33, 16146 Genova, Italy 6INFM-LAMIA/CNR, Dipartimento di Chimica e Chimica Industriale, Via Dodecaneso 31, 16146 Genova, Italy 7GHMFL, CNRS, 25 Avenue des Martyrs, BP 166, 38042 Grenoble, France (literal)
Titolo
  • Effects of neutron irradiation on polycrystalline Mg11B2 (literal)
Abstract
  • We studied the influence of the disorder introduced in polycrystalline MgB2 samples by neutron irradiation. To circumvent self-shielding effects due to the strong interaction between thermal neutrons and 10B we employed isotopically enriched 11B which contains 40 times less 10B than natural B. The comparison of electrical and structural properties of different series of samples irradiated in different neutron sources, also using Cd shields, allowed us to conclude that, despite the low 10B content, the main damage mechanisms are caused by thermal neutrons, whereas fast neutrons play a minor role. Irradiation leads to an improvement in both upper critical field and critical current density for an exposure level in the range 1-2?1018 cm-2. With increasing fluence the superconducting properties are depressed. An in-depth analysis of the critical field and current density behavior has been carried out to identify what scattering and pinning mechanisms come into play. Finally, the correlation between some characteristic lengths and the transition widths is analyzed. (literal)
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