Journal ArticleDOI
Conclusive evidence for the influence of nuclear orientation on quasifission.
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TLDR
Fission fragment anisotropies and mass distributions have been measured to high accuracy, over a wide range of angles, for the full momentum transfer fission reaction as mentioned in this paper, where the bombarding energies spanned the fusion barrier distribution, in steps of 1 MeV.Abstract:
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.read more
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Journal ArticleDOI
Measuring barriers to fusion
TL;DR: In this paper, a quantitative understanding of the entrance-channel effects induced by target and projectile structure has emerged, based on recent high-precision measurements of fusion excitation functions.
Journal ArticleDOI
Effect of breakup on the fusion of Li 6 , Li 7 , and Be 9 with heavy nuclei
Mahananda Dasgupta,P. R. S. Gomes,David Hinde,S B Moraes,Roberto Meigikos dos Anjos,Annette Berriman,Rachel D Butt,N. Carlin,J. Lubian,Clyde Morton,John Newton,A Santo de Toledo +11 more
TL;DR: In this paper, high precision complete and incomplete fusion cross sections have been measured for the $6}\mathrm{Li}+^{209}\mathm{Bi}, $7]-mathrm[Li+^{ 209]-mathm[Bi], and $9]-mathmm{Be}+''208]-Pb reactions, at energies near and below the Coulomb barrier.
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Nuclear quantum many-body dynamics: from collective vibrations to heavy-ion collisions
TL;DR: A summary of recent researches on nuclear dynamics with realistic microscopic quantum approaches is presented in this article, where the Balian-Veneroni variational principle is used to derive the time-dependent Hartree-Fock (TDHF) equation describing the dynamics at the mean-field level, as well as an extension including small-amplitude quantum fluctuations which is equivalent to the timedependent random-phase approximation (TDRPA).
Journal ArticleDOI
Isotopic dependence of fusion cross sections in reactions with heavy nuclei
TL;DR: In this paper, the dependence of fusion cross section on the isotopic composition of colliding nuclei is analyzed within the dinuclear system concept for compound nucleus formation, and the ingredients of the evaporation residue cross sections depend decisively on the neutron numbers of dinuclear systems.
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Nuclear fission: a review of experimental advances and phenomenology.
TL;DR: This work first of all reviews the recent developments in experimental fission techniques, in particular the resurgence of transfer-induced fission reactions with light and heavy ions, the emerging use of inverse-kinematic approaches, both at Coulomb and relativistic energies, and of fission studies with radioactive beams.