Elastic scattering of 7.9-MeV photons from 181Ta

S. Kahane, R. Moreh

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30 Scopus citations


Differential cross sections for elastic scattering of 7.9-MeV photons from 181Ta have been measured at angles ranging from 25 to 140°. These results and previously measured differential cross sections from 238U and 232Th are compared with theoretical predictions taking into account Rayleigh scattering, nuclear Thomson scattering, nuclear resonance scattering, and Delbruck scattering. It is shown that at this energy the forward elastic scattering at angles ≤75° is due almost entirely to Delbruck scattering. The experimental results were found to deviate systematically from predicted values throughout most of the angular range. A striking agreement with theory was obtained only after excluding the contribution of the real part of the Delbruck scattering amplitude. [NUCLEAR REACTIONS Ta181(,), E=7.9 MeV; measured Delbruck scattering,σ(Θ), Θ=25-140.]

Original languageEnglish
Pages (from-to)2384-2390
Number of pages7
JournalPhysical Review C - Nuclear Physics
Issue number6
StatePublished - 1 Jan 1974
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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