In order to study radiation stability of the neutron supermirror coatings, the effect of large irradiation doses on polarizing (FeCoV/TiZr) and non-polarizing (NiMo/Ti and Ni/Ti) supermirrors has been studied. The samples were irradiated at the WWR-M reactor (Gatchina) inside a vertical channel behind the Be reflector, where the flux of thermal neutrons and neutrons with energies exceeding 1 MeV was, respectively, (0.6-1) × 1013 and 2 × 1011 cm-2 s-1. During irradiation the temperature of the samples did not exceed 70°C. The data obtained at the reflectometer RPN-2M (PNPI) for FeCoV/TiZr and NiMo/Ti supermirrors (produced in PNPI) and for Ni/Ti supermirrors (produced in PSI), irradiated with different doses, are presented. The polarizing efficiency and the reflectivity of the supermirrors sputtered onto float-glass substrates have not revealed significant changes for the fluences up to 1019 cm-2.

Original languageEnglish
Pages (from-to)136-139
Number of pages4
JournalPhysica B: Condensed Matter
Volume297
Issue number1-4
DOIs
StatePublished - Mar 2001
EventProceeding of the 3rd International Workshop on Polarised Neutrons - Gatchina, Russian Federation
Duration: 20 Jun 2000 → …

    Research areas

  • Irradiation stability, Neutron reflectometry, Neutron supermirrors

    Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

ID: 86507229