Production of cold target-like fragments in the reaction ofCa48+

Cross sections for nuclear reactions in collisions of238U+238U and238U +197Au near and below the coulomb barrier

“…This was followed by an ion-exchange chromatography separation on four columns [23]. Similar separation schemes have been used previously [18,19,24]. In case of preparations of transfer products from the target, the macroscopic uranium target material has to be removed by precipitation as ammoniumdiuranate.…”

“…For heavy product nuclei, the difference in mass numbers between the experimental maximum of the isotope distribution and the MPE prediction is due to neutron evaporation. Despite of the somewhat limited data base in the present work, we employ this method using the experience gained in similar experiments [17][18][19] to study the systematics of multinucleon transfer cross sections. We start with the radium data in the reaction 238U-}-197Au.…”

“…The role that the static deformation of the 23sU nucleus plays in the establishment of contact might become visible if one compares the slope of the excitation functions for production of multinucleon transfer products in the doubly deformed system 23sU+Z3SU and the deformed-spherical system 23sU + 197Au. Finally, the survivors of multi-nucleon transfer might provide information on the interesting question of excitation-energy sharing in binary reactions near the Coulomb barrier [17][18][19][20][21][22].…”

New nuclides: Neptunium-243 and neptunium-244

“…The cross section for 243Np pro- neutrons from more neutron-rich neptunium isotopes, and 2) the production of relatively neutrondeficient primary neptunium nuclides in more damped collisions; the minimization of the potential energy of the reacting system at fixed charge asymmetry favors the production of these nuclides [19,23,24]. Also shown in Fig.…”

Calculation of cross sections for binary reactions between heavy ion projectiles and heavy actinide targets

“…The output of this calculation is tabulated as the cross section for the net transfer of (x) 6 nucleons from projectile to target, or vice versa, without regard for whether they are neutrons or protons. The same will generally not be true of the experimental results with which the calculation is compared.…”