Quasielastic transfer reactions in 238U + 197Au and 197Au + 197Au collisions near the Coulomb barrier

Cold Multinucleon Transfer and Synthesis of New Elements

“…The odd-even effect is clearly seen also in the 3rd and 4th step in both cases [45,75]. This result, as well as the re sult of previous neutron-transfer studies [1,10,13,46] below and at the barrier (see also the compilation in Sec. 3.3) give an average probability for neutron transfer of 1/3.5 « 0.28 in the maximum of the observed angular distributions (see Table 2).…”

“…Studies of transfer reactions using the radiochemical method are often done, similar to studies with charged particle spectroscopy, with thin targets and the catcher foil technique in order to obtain angular distributions of reaction products [13]. The individual activities of known nuclides are identified by their characteristic radiation and by their lifetime.…”

“…In contrast we note that at sufficiently small energies the experimental transfer probabilities for one-up to four-neutron transfers summed over the experimental energy spectrum, are independent from the incident energy, and when plotted as function of the overlap parameter can be overlaid on a common curve [10,13,75]. …”

“…16 [10], Pb + Sm [11], and U + Au [13] as function of the overlap parameter d 0 . The two-neutron-transfer probability also shown in the same Figs.…”

“…Where a is given by the reduced mass of the valence particle /i = {m x mx { )/ (m x 4-raAj), x = c and the binding energy EB a = y/2ixE B /h (13) and N is the normalisation, which contains also the spectroscopic strength.…”