Review of integral data on higher transactinides

A review of the status of integral measurements is presented for 240Pu, 241Pu, 242Pu, 241Am and 243Am. This review includes integral measurements pertinent to thermal reactor systems, i.e., thermal cross sections and resonance integrals, as well as measurements for fast reactor systems. It appears that for these nuclides the data for thermal reactors are in good shape; however, more work is recommended in defining the branching ratio of the capture cross section of 241Am to the isomeric and ground states of 242Am. Also, benchmark irradiation data are needed for cross section data testing using depletion/production codes. For fast reactors, experiments are in progress, in the UK, in France, and also in the US, with partial results available at this time. Fast integral data obtained from these measurements will be very beneficial. The recommendation pertaining to 241Am and proper benchmarks for thermal reactor applications also applies to fast reactor applications. 2 figures, 10 tables