Abstract
The thermal neutron capture cross section of has been determined from the amount of formed in pile-irradiated samples of graphite, barium carbonate, and carbon dioxide. Because of the impurity reaction, , of comparatively high cross section, the results were consistent only when samples were used which were enriched in .
The average isotopic cross section determined for the enriched samples was 1.4±0.2 millibarns. The final value of the cross section in these samples corrected for the estimated residual nitrogen impurity is 0.9±0.2 millibarn.
- Received 22 March 1954
DOI:https://doi.org/10.1103/PhysRev.95.92
©1954 American Physical Society