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Magnetic compton profile measurement using circularly polarized gamma-rays from oriented191mIr nuclei

Authors
Journal
Nuclear Instruments and Methods in Physics Research
0167-5087
Publisher
Elsevier
Publication Date
Volume
221
Issue
2
Identifiers
DOI: 10.1016/0167-5087(84)90013-9
Disciplines
  • Mathematics
  • Physics

Abstract

Abstract Circularly polarized 129 keV γ-rays from oriented 191mIr nuclei are used to measure the Compton profile of magnetic electrons in ferromagnetic iron. A high degree of circular polarization is obtained even at temperatures about 200 mK owing to the large hyperfine magnetic field at the Ir site in Fe metal. Utilization of a 40 mCi γ-ray source, together with a 3He/ 4He dilution refrigerator and a solid state detector, is found to be effective in obtaining high statistical accuracy. Efficient geometrical arrangement of the apparatus is discussed based on the cross section of the spin-dependent Compton scattering. Experimental procedures, source preparation and data accumulation are described in detail.

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