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Development of nuclear transmutation methods for converting LLFP into stable or short-lived nuclides, 8; Neutron capture cross-section measurements of stable Se isotope nuclides as part of the ImPACT Project

Hales, B. P.; Nakamura, Shoji ; Kimura, Atsushi  ; Iwamoto, Osamu 

We have measured the neutron-capture cross-sections of various Se isotopes ($$^{74,76,77,78,80,82}$$Se) via neutron time-of-flight (nTOF) method, using J-PARC/MLF/ANNRI, up to the incident neutron energy range of 1.5 keV. We are currently considering measuring the long-lived fission product (LLFP) $$^{79}$$Se (half-life: 330,000 years), a component of nuclear waste, using J-PARC/MLF/ANNRI. It is thought to be very difficult to remove stable selenium isotopes from our $$^{79}$$Se sample. In order to increase the quality of the data in a $$^{79}$$Se measurement, data for stable selenium isotopes are necessary. In this presentation, we will presently mainly on our findings in regareds to $$^{78}$$.Se



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