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Simple estimation of fission yields with selective channel scission model

Ota, Masayuki; Nakamura, Shoji

The mass distributions of fission yields for neutron-induced fissions of $$^{232}$$Th, $$^{233}$$U, $$^{235}$$U, $$^{236}$$U, $$^{238}$$U, $$^{237}$$Np, $$^{239}$$Pu, $$^{240}$$Pu, $$^{241}$$Pu, $$^{242}$$Pu and for spontaneous fissions of $$^{241}$$Am, $$^{243}$$Am and for fissions of $$^{106}$$Pd and $$^{197}$$Au were calculated by the selective channel scission (SCS) model with simple assumptions. The channel-dependent fission barriers were deduced by using shapes of fission fragments in the ground states. The present method makes it possible to estimate fission yields for a wide range of fissionable nuclei without adjustable parameters, although there exist discrepancies between the fission yields calculated by SCS model and the data of JENDL-3.3 in the mass regions of A = 80$$-$$95 and A = 135$$-$$150.

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Category:Nuclear Science & Technology

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