A. Letourneau, G. Fioni, F. Marie
Mar 1, 2006
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Influential Citations
9
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Journal
Annals of Nuclear Energy
Abstract
A measurement of the polonium production in a solid Bi target, placed in a high thermal neutron flux of 2.3 10 13 n/cm 2 /s, was performed. Two different activation methods, based on α and γ spectroscopy, were used to cross check the results. Values of (16.08 ± 1.8) mb and (18.4 ± 0.9) mb for the 210 P o (i.e. 210gs Bi) formation cross section were obtained and a recommended value of (17.9 ± 0.8) mb was proposed. Our results are in disagreement with adopted cross section values in the main nuclear data libraries, namely smaller by 25% for 210gs Bi. These new values will account for more precise evaluations of 210 P o formation in moderated spallation targets containing 209 Bi.