Absolute Measurements of X-Ray Beam Energy and Photoneutron Cross Sections for Natural Cu and Pb

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概要

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• Absolute determination of X-ray beam energy by cavity ionization camber method has described and absolute photoneutron cross sections for natural Cu and Pb have been determind with an ETL quantameter and a 4π neutron detector using the X-ray beam from a 25 MeV betatron. Peak photoneutron cross section for natural Cu and Pb are 78±8m at 17.2 MeV and 660±60mb at 14.1 MeV, respectively. These values are about 20% lower than the average cross section value obatained by several bremsstrahlung experiments. σ_<-2> for Cu and Pb are 1.81mb/MeV from threshold to 24 MeV and 18.6mb/MeV from threshold to 23 MeV, respectively. Using the contribution of the (γ,p) cross section for Cu, the ratios of σ_<-2> to 0.00225 A^<5/3>mb/MeV for Cu and Pb are 0.95±0.14 and 1.13±0.17, respectively.

• 社団法人日本物理学会の論文
• 1968-09-15

著者

• TOMIMASU Takio

  Electrotechnical Laboratory

• Tomimasu Takio

  Electrotechnical Laboraory

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