Preequilibrium cluster emission in massive transfer reactions near Coulomb barrier energy

Abstract

Within the framework of the dinuclear system model, the preequilibrium emission of neutron, proton, deuteron, triton, ${}^3$He, $\alpha$, ${}^6$Li, ${}^7$Li, ${}^8$Be and ${}^9$Be in the transfer reactions of ${}^{12}$C + ${}^{209}$Bi, ${}^{40,48}$Ca+${}^{238}$U, ${}^{238}$U+${}^{238}$U and ${}^{238}$U+${}^{248}$Cm has been systematically investigated. The production rate, kinetic energy spectra and emission angular distribution are calculated. It is found that the preequilibrium emission mechanism is associated with the reaction system and beam energy. The preequilibrium cross sections of proton, deuteron, triton and alpha are comparable in magnitude. The reaction with ${}^{40}$Ca is favorable for the cluster emission in comparison with ${}^{48}$Ca on ${}^{238}$U at the near barrier energy. A broad angular distribution of the preequilibrium cluster is found in the heavy systems ${}^{238}$U+${}^{238}$U and ${}^{238}$U+${}^{248}$Cm.

arXiv comment9 pages, 6 figures

References in corpus (9)

• Nuclear Ground-State Masses and Deformations
• Formation of superheavy nuclei in cold fusion reactions
• Production of neutron-rich isotopes around N=126 in multinucleon transfer reactions
• Production of heavy isotopes in transfer reactions by collisions of ${}^{238}$U+${}^{238}$U
• Production of heavy and superheavy nuclei in massive fusion reactions
• Competition of coalescence and "fireball" processes in nonequilibrium emission of light charged particles from p+Au collisions
• A Statistical Approach to Describe Highly Excited Heavy and Superheavy Nuclei
• Light fragment and neutron emission in high-energy proton induced spallation reactions
• Production of neutron-rich heavy nuclei around N = 162 in multinucleon transfer reactions

Cited by in corpus (2)

• Dynamics of light nuclei produced in the massive transfer reactions
• Time-dependent random phase approximation for particle-number fluctuations and correlations in deep-inelastic collisions of ${}^{144}$Sm+${}^{144}$Sm and ${}^{154}$Sm+${}^{154}$Sm