Limiting angular momentum for statistical model description of fission
D. J. HindeDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaA. C. BerrimanDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaM. DasguptaDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaJ. R. LeighDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaJ. C. MeinDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaC. R. MortonDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaJ.O. NewtonDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia
1999en
ABI
Аннотация
Fission fragment cross sections and angular anisotropies have been measured to high accuracy for the ${}^{19}{\mathrm{F}+}^{208}\mathrm{Pb}$ reaction, together with evaporation residue cross sections, at bombarding energies from below the fusion barrier to 1.75 times the barrier energy. These data allow reliable calculations of the partial waves contributing to fission. Extensive statistical model calculations of the anisotropies are presented, including the effects of different fission transient delay times. The anisotropies at the highest bombarding energies can only be reproduced assuming that the fission barrier no longer controls the fission process when its height is less than the nuclear temperature.
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