Absolute Measurements of X-Ray Beam Energy and Photoneutron Cross Sections for Natural Cu and Pb
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- Tomimasu Takio
- Electrotechnical Laboratory
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Abstract
Absolute determination of X-ray beam energy by cavity ionization camber method has been described and absolute photoneutron cross sections for natural Cu and Pb have been determined with an ETL quantameter and a 4π neutron detector using the X-ray beam from a 25 MeV betatron.<BR>Peak photoneutron cross section for natural Cu and Pb are 78±8 m at 17.2 MeV and 660±60 mb at 14.1 MeV, respectively. These values are about 20% lower than the average cross section value obtained by several bremsstrahlung experiments. σ−2 for Cu and Pb are 1.81 mb/MeV from threshold to 24 MeV and 18.6 mb/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 A5⁄3 mb/MeV for Cu and Pb are 0.95±0.14 and 1.13±0.17, respectively.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 25 (3), 655-663, 1968
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204191482368
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- NII Article ID
- 110001957540
- 130003734415
- 210000080771
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- NII Book ID
- AA00704814
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- BIBCODE
- 1968JPSJ...25..655T
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- COI
- 1:CAS:528:DyaF1cXltFahu74%3D
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 8501730
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed