Specific moments in detection of superheavy nuclei: DGFRS-2 spectrometer

Ibadullayev D. Tsyganov Y.S. Polyakov A.N. Voinov A.A. Shumeiko M.V.
1 May 2023 Institute of Physics

Journal of Instrumentation
2023 #18 Issue 5

In this paper, we present the results of the first beam tests of the detection system at the focal plane of the Dubna Gas-Filled Recoil Separator-2 (DGFRS-2), which receives beams from the DC-280 FLNR cyclotron. The high beam intensity of ⁴⁸Ca⁺¹⁰ heavy ions from the cyclotron enables us to obtain a number of superheavy recoils sufficient to compare both the measured and calculated spectra of superheavy recoils implanted into a silicon detector. A real-time algorithm to search for an Evaporation Residue (ER) — α correlated sequences is described in brief. It should be noted that the DGFRS-2 spectrometer operates in conjunction with the 48 × 128 strip DSSD (Double-sided Silicon Strip Detector; 48 × 226 mm²) detector and a low-pressure pentane-filled gaseous detector (1.2 Torr; 80 × 230 mm²). A block-diagram of the spectrometer and the event format are also presented. Special attention is paid to the response of a low-pressure pentane-filled ΔE multiwire proportional chamber for recoils of Fl, synthesized in the ²⁴²Pu + ⁴⁸Ca → ²⁸⁷Fl + 3n complete fusion nuclear reaction. Some actual parameters of the detection system have also been extracted from ^natYb + ⁴⁸Ca, ²³²Th + ⁴⁸Ca, ²⁴³Am + ⁴⁸Ca, ²³⁸U + ⁴⁸Ca reactions. The effect of neighbor strip charge sharing for the ohmic side of the DSSD detector is also under consideration.

Instrumentation and methods for heavy-ion reactions and fission studies , Spectrometers

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Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
L.N. Gumilyov Eurasian National University, Astana, 010000, Kazakhstan

Joint Institute for Nuclear Research
Institute of Nuclear Physics
L.N. Gumilyov Eurasian National University

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