Статья

Conclusive evidence for the influence of nuclear orientation on quasifission

D. J. HindeDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaM. DasguptaDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaJ. R. LeighDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaJ. C. MeinDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaC. R. MortonDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaJ.O. NewtonDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaH. TimmersDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, Australia

1996en

ABI

Аннотация

Fission fragment anisotropies and mass distributions have been measured to high accuracy, over a wide range of angles, for the $^{16}\mathrm{O}$ + $^{238}\mathrm{U}$ reaction. The bombarding energies spanned the fusion barrier distribution, in steps of 1 MeV. Fission following transfer reactions was rejected by making use of the deduced velocity vectors of the fissioning nuclei. The resulting mass distributions for full momentum transfer fission show a small but significant skewness, which increases as the beam energy falls through the fusion barrier region, displaying a similar energy dependence as the fission fragment angular anisotropies. This is conclusive evidence for the interpretation that collisions with the tips of the deformed $^{238}\mathrm{U}$ target nuclei lead to quasifission, while collisions with the sides result in fusion-fission. \textcopyright{} 1996 The American Physical Society.

Идентификаторы

DOI: 10.1103/physrevc.53.1290

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