Photoneutron Cross Sections of Ta-181 and Ho-165
Mar 15, 1963
6 pages
Published in:
- Phys.Rev. 129 (1963) 2723-2729
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Abstract: (APS)
The (γ,n) and (γ,2n) cross sections for Ta181 and Ho165 have been measured by use of nearly monochromatic photons obtained from the annihilation-in-flight of fast positrons. The integrated cross sections up to 28 MeV for σ(γ,n) and σ(γ,2n), respectively, are 1.32±0.13 and 0.93±0.09 MeV-b for Ta, and 1.47±0.15 and 0.90±0.09 MeV-b for Ho. Values obtained for σ−2 are 10.88 and 10.93 mb/MeV, respectively, for these elements. The level density parameters, a, were determined to be 15.7 and 22.0 reciprocal MeV, respectively. The intrinsic quadrupole moments determined from the compound nucleus formation cross sections, were found to be 6.71±0.74 and 7.40±0.90 b for Ta and Ho, respectively.References(27)
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