Resonant tunneling through the triple-humped fission barrier of 236U

M. Csatlós, A. Krasznahorkay, P.G. Thirolf, D. Habs, Y. Eisermann, T. Faestermann, G. Graw, J. Gulyás, M.N. Harakeh, R. Hertenberger, M. Hunyadi, H.J. Maier (+3 others)
2005 Physics Letters B  
Resonant tunneling through the triple-humped fission barrier of U-236 Abstract The fission probability of 236 U as a function of the excitation energy has been measured with high energy resolution using the 235 U(d, pf ) reaction in order to study hyperdeformed (HD) rotational bands. Rotational band structures with a moment of inertia of θ = 217 ± 38h 2 /MeV have been observed, corresponding to hyperdeformed configurations. From the level density of the rotational bands the excitation energy of
more » ... xcitation energy of the ground state in the third minimum was determined to be 2.7 ± 0.4 MeV. The excitation energy of the lowest hyperdeformed transmission resonance and the energy dependence of the fission isomer population probability enabled the determination of the height of the inner fission barrier E A = 5.05 ± 0.20 MeV and its curvature parameterhω A = 1.2 MeV. Using this new method the long-standing uncertainties in determining the height of the inner potential barrier in uranium isotopes could be resolved.
doi:10.1016/j.physletb.2005.04.042 fatcat:obf5cz2l55ft5a624dk3bqwd4i