Elsevier

Nuclear Physics A

Volume 209, Issue 1, 16 July 1973, Pages 181-188
Nuclear Physics A

Measurement of the 50Cr(γ, n)49Cr cross section with monochromatic γ-rays

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Abstract

The 50Cr(γ, n)49Cr cross section has been measured over the energy range Eγ = 20.43 to Eγ = 22.22 MeV using monochromatic γ-rays from the 3H(p, γ)4He reaction and detecting the resulting 49Cr positon activity. The γ-rays were monitored by a 12.7 cm × 15.2 cm NaI(Tl) crystal. The positon activity was determined by a coincidence detector consisting of two 7.62 cm × 7.62 cm NaI(Tl) crystals set on the annihilation radiation photopeaks. The γ-ray energy resolution was less than 110 keV over the whole energy range. Structure in the cross section was not observed.

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Research supported by a grant from the National Research Council of Canada.

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