A new high-resolution gamma-ray monochromator

R. Moreh, I. Jacob, R. Mourad

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7 Scopus citations


A high-resolution gamma monochromator having a resolution of ≁10-6 is described. The variable-energy γ source is obtained by nuclear resonance scattering, of neutron-capture γ rays, through various scattering angles. Several possible examples of combinations of γ sources and resonance scatterers are discussed. In particular, a lead target was employed to scatter the 7.28 MeV γ line of neutron-capture γ rays of iron. Variation of the angle of the resonantly scattered 7.28 MeV photons between 60°-150° permits an energy scan of 400 eV in any absorber. Thus, nuclear energy levels in some absorbers were photoexcited and the corresponding ground-state widths were extracted from the measured absorption spectrum. The results for the case of a Ce absorber are discussed in detail.

Original languageEnglish
Pages (from-to)193-203
Number of pages11
JournalNuclear Instruments and Methods
Issue number2
StatePublished - 1 Aug 1975

ASJC Scopus subject areas

  • Medicine (all)


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