Search

Three approaches to the measurement of a rare α decaying products produced in heavy-ion induced nuclear reactions are described. One is based on a chemical extraction and following deposition of the nuclides under investigation onto the surface of the detector, whereas the second one is associated with long–lived products implanted into silicon detectors by using the electromagnetic separation technique. The third approach relates with an application of real-time mode detection of correlated energy–time–position recoil-α sequences from 48 Ca induced nuclear reactions with actinide targets, like 242, 244 Pu, 245, 248 Cm, 239 Am and 249 Cf. Namely with this technique, it has became possible to provide a radical suppression of backgrounds in the full fusion (3–5n) reactions aimed to the synthesis of super heavy elements with Z =113–116.

Simulation codes for the spectra of heavy implanted nuclei, applications for online data visualization and real time PC-based algorithms are considered. Special attention is paid to the application of real time techniques for radical suppression of background products in heavy-ion-induced nuclear reactions at the U-400 cyclotron of the Flerov Laboratory of Nuclear Reactions. The detection system of the Dubna gas-filled recoil separator (DGFRS) is also briefly described. Calculated heavy recoil spectra are compared with those measured in heavy-ion-induced nuclear reactions.

A PC-based algorithm (coded in C++) to extract in real-time the correlated recoil-alpha sequences in heavy-ion induced nuclear reactions has been designed and applied in various experiments aimed at the synthesis of superheavy elements. The algorithm operates together with the data acquisition system of the Dubna Gas-Filled Recoil Separator (GFRS). The GFRS detector module design is also presented.