[1M06-08] Nuclear Transmutation of LLFP 2

[1M08] Development of nuclear transmutation methods for converting LLFP into stable or short-lived nuclides

(8)Neutron capture cross-section measurements of stable Se nuclides as part of the ImPACT Project

*Brian Yamada Hales¹, Shoji Nakamura¹, Atsushi Kimura¹, Osamu Iwamoto¹ (1. Japan Atomic Energy Agency)

Keywords:ImPACT, neutron capture cross-section, ANNRI, selenium, TOF method

As part of the ImPACT project, we have measured the cross-section of the stable selenium isotopes ^{74,76,77,78,80,82}Se, via time-of-flight method. We are currently examining the concept of measuring the LLFP ⁷⁹Se (half-life 330,000 y) a long-lived fission product contained in high-level waste, using ANNRI at J-PARC/MLF. It is assumed that a ⁷⁹Se sample would include stable Se isotopes as impurities, impossible to be removed by chemical separation. Thus it is vital to measure the capture-cross sections of stable Se isotopes in order to accurately measure the cross-setion of ⁷⁹Se. This presentation will focus mainly on the results of ⁷⁸Se.