Short timescale behavior of colliding heavy nuclei at intermediate energies

Abstract

An Antisymmetrized Molecular Dynamics model is used to explore the collision of ${}^{114}$Cd projectiles with ${}^{92}$Mo target nuclei at E/A=50 MeV over a broad range in impact parameter. The atomic number (Z), velocity, and emission pattern of the reaction products are examined as a function of the impact parameter and the cluster recognition time. The non-central collisions are found to be essentially binary in character resulting in the formation of an excited projectile-like fragment (PLF${}^{\ast }$) and target-like fragment (TLF${}^{\ast }$). The decay of these fragments occurs on a short timescale, 100$\le$t$\le$300 fm/c. The average excitation energy deduced for the PLF${}^{\ast }$ and TLF${}^{\ast }$ `saturates for mid-central collisions, 3.5$\le$b$\le$6 fm, with its magnitude depending on the cluster recognition time. For short cluster recognition times (t=150 fm/c), an average excitation energy as high as $\approx$6 MeV is predicted. Short timescale emission leads to a loss of initial correlations and results in features such as an anisotropic emission pattern of both IMFs and alpha particles emitted from the PLF${}^{\ast }$ and TLF${}^{\ast }$ in peripheral collisions.

arXiv comment19 pages, 17 figures

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Cited by in corpus (13)

• Probing the Nuclear Symmetry Energy with Heavy Ion Collisions
• Isobaric Yield Ratios and The Symmetry Energy In Fermi Energy Heavy Ion Reactions
• Correlations between emission timescale of fragments and isospin dynamics in ${}^{124}$Sn+${}^{64}$Ni and ${}^{112}$Sn+${}^{58}$Ni reactions at 35 AMeV
• Isocaling and the Symmetry Energy in the Multifragmentation Regime of Heavy Ion Collisions
• Critical behavior of the isotope yield distributions in the Multifragmentation Regime of Heavy Ion Reactions
• Neutron to proton ratios of quasiprojectile and midrapidity emission in the ${}^{64}$Zn + ${}^{64}$Zn reaction at 45 MeV/nucleon
• Relevance of equilibrium in multifragmentation
• Primary Isotope Yields and Characteristic Properties of the Fragmenting Source in Heavy-ion Reactions near the Fermi Energies
• Alpha Conjugate Neck Structures in the Collisions of 35 MeV/nucleon 40Ca with 40Ca
• Isospin compositions of correlated sources in the Fermi energy domain
• Post breakup dynamics of fragments produced in nuclear multifragmentation
• Isotopic dependence of the fragments' internal temperatures observed in multifragment emission
• Isobar correlations bearing information on the properties of hot disassembling nuclear sources