Cobaltous Oxide (I): A Compact Single-Line Source

  • James G. Mullen
  • Hang Nam Ok

Abstract

Mössbauer experiments using CoO sources usually show two lines at room temperature when used with a narrow unsplit absorber. These correspond to different chemical environments and have been identified with Fe2+ and Fe3+. By a combination of Mössbauer, X-ray, and chemical techniques, we have been able to prepare stopchiometric CoO sources which have only the Fe2+ component, or alternatively only the Fe3+ component, The Fe2+ component gives a narrow single line, with a recoil-free fraction at room temperature exceeding that of Co57-doped copper sources. The effective Mössbauer characteristic temperature for Fe2+ in CoO(I) was measured to be 510°K. By contrast the unsplit Fe3+ line associated with CoO(II) has a very broad line width and a Mössbauer characteristic temperature of only 320°K.Our Prescription for Co57O(I) should permit the fabrication of very strong, single-line, sources with minimum electronic absorption.

Keywords

Line Width Cobaltous Oxide Cobaltous Nitrate Gravimetric Determination Cobalt Metal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1968

Authors and Affiliations

  • James G. Mullen
    • 1
  • Hang Nam Ok
    • 2
  1. 1.Physics DepartmentPurdue UniversityLafayetteUSA
  2. 2.Solid State and Materials ProgrammePrinceton UniversityPrincetonUSA

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