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A Global dispersive coupled-channel optical model potential for actinides

Capote, R.*; Chiba, Satoshi; Soukhovitskij, E. Sh.*; Quesada, J. M.*; Bauge, E.*

A global dispersive coupled-channel optical model (DCCOM) potential is proposed to describe neutron and proton interactions with actinide nuclei at 0.001 to 200 MeV range. A linear dependence of the geometrical parameters on mass number $$A$$ is employed, and deformation parameters are adjusted for each nucleus to extend the DCCOM determined previously for $$^{238}$$U and $$^{232}$$Th to neighboring nuclei, $$^{241}$$Am, $$^{242,240,239}$$Pu and $$^{235,233}$$U. Fitted deformations are in reasonable agreement with those derived theoretically. The present DCCOM is capable of describing not only the cross sections but also the total cross section differences between $$^{232}$$Th and $$^{238}$$U up to 200 MeV within experimental uncertainty, verifying that the isovector potential and assumed geometrical parameters are adequate to describe the minute difference of the cross sections of actinide nuclei and its energy dependence.

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Category:Nuclear Science & Technology

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