Abstract
Background: Low-energy multinucleon transfer reactions may be used for production of new neutron-enriched heavy nuclei.
Purpose: Our aim is to investigate the influence of proton () and neutron (, 126) shells as well as orientation effects on the formation of reaction products in the inverse quasifission process in the reactions .
Methods: Mass, energy, and angular distributions of primary binary fragments formed in the reactions at an energy of 878 MeV, and at 860 and 935 MeV, have been measured using the double-arm time-of-flight spectrometer CORSET at the U400 cyclotron of the Flerov Laboratory of Nuclear Reactions (FLNR) at the Joint Institute for Nuclear Research (JINR), Dubna.
Results: Enhancement in the yield of products with masses 200–215 u has been found for both reactions. The cross sections of the formation of trans-target fragments with masses around 208 u are found to be about 10 μb at the Coulomb barrier energy and reach the level of 0.5 mb at the energy above the barrier for side-to-side collision.
Conclusions: The enhanced yield of products with masses heavier than the target mass confirms the important role of the closed shells at and , 126 in the inverse quasifission process in low-energy damped collisions. The orientation effect caused by the strong deformation of colliding nuclei can result in a gain in the yield of heavy target-like fragments.
3 More- Received 25 September 2017
- Corrected 22 January 2018
DOI:https://doi.org/10.1103/PhysRevC.96.064621
©2017 American Physical Society
Physics Subject Headings (PhySH)
Corrections
22 January 2018