Abstract
Investigations of complete fusion reactions leading to the synthesis of heavy and superheavy nuclei have been an important part of the experimental program at the Flerov Laboratory of Nuclear Reactions (JINR, Dubna). For synthesis and decay studies of heavy nuclei, a project of modernization of the existing experimental set up VASSILISSA is now underway. The results of the first experimental tests with the modernized VASSILISSA separator are presented, in particular the experimentally measured transmission coefficients for recoil nuclei synthesized in asymmetric reactions with a 22 Ne beam. These results completely confirm the ion optical calculations performed during the design stage of the modernization.
Highlights
Within the past 15 years, the recoil separator VASSILISSA [1,2,3,4] has been used for the investigations of evaporation residues (ER’s) produced in heavy ion induced complete fusion reactions
The kinematic separator VASSILISSA had an ion optical scheme Q-Q-Q-E-E-E-Q-Q-Q-D [1, 2]
It was a so called energy filter, since the main separation of the reaction products was based on the difference in Eion/Qion ratio
Summary
The kinematic separator VASSILISSA had an ion optical scheme Q-Q-Q-E-E-E-Q-Q-Q-D (where Q stands for Quadrupole lens, E for Electrostatic Dipole, D for Dipole magnet) [1, 2]. Within the past 15 years, the recoil separator VASSILISSA [1,2,3,4] has been used for the investigations of evaporation residues (ER’s) produced in heavy ion induced complete fusion reactions.
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