DGFRS-2—A gas-filled recoil separator for the Dubna Super Heavy Element Factory

Yu Ts Oganessian, V. K. Utyonkov, A. G. Popeko, D. I. Solovyev, F. Sh Abdullin, S. N. Dmitriev, D. Ibadullayev, M. G. Itkis, N. D. Kovrizhnykh, D. A. Kuznetsov, O. V. Petrushkin, A. V. Podshibiakin, A. N. Polyakov, R. N. Sagaidak, L. Schlattauer, I. V. Shirokovsky, V. D. Shubin, M. V. Shumeiko, Yu S. Tsyganov, A. A. VoinovV. G. Subbotin, V. V. Bekhterev, N. A. Belykh, O. A. Chernyshev, K. B. Gikal, G. N. Ivanov, A. V. Khalkin, V. V. Konstantinov, N. F. Osipov, S. V. Paschenko, A. A. Protasov, V. A. Semin, V. V. Sorokoumov, K. P. Sychev, V. A. Verevochkin, B. I. Yakovlev, S. Antoine, W. Beeckman, P. Jehanno, M. I. Yavor, A. P. Shcherbakov, K. P. Rykaczewski, T. T. King, J. B. Roberto, N. T. Brewer, R. K. Grzywacz, Z. G. Gan, Z. Y. Zhang, M. H. Huang, H. B. Yang

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Abstract

The main goal of development of the new Dubna Gas-Filled Recoil Separator (DGFRS-2) is to sufficiently improve the efficiency of studies on heavy and superheavy nuclei at the Super Heavy Element Factory of the Flerov Laboratory of Nuclear Reactions (FLNR) at the Joint Institute for Nuclear Research. The use of beams with the intensity up to 6×1013 s−1 (10 pμA) delivered by the DC280 cyclotron requires an effective setup providing high suppression of background reaction products. The described gas-filled separator is optimized for synthesis and study of heavy isotopes produced in complete fusion reactions of massive nuclei. Basic characteristics of DGFRS-2, as well as the results of the first test experiments, are presented. In comparison to the DGFRS-1, the transmission efficiency was doubled, and the background was reduced by a factor 200.

Funding

Research at ORNL was supported by the U.S. DOE Office of Nuclear Physics under DOE Contract No. DE-AC05-00OR22725 with UT Battelle, LLC. This work was also supported by the National Natural Science Foundation of China (Grant No. 11975279 ). These studies were supported by the Ministry of Science and Higher Education of the Russian Federation through the Grant No. 075-10-2020-117 and by the JINR Directorate grant. The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: V.K. Utyonkov, A.G. Popeko, D.I. Solovyev, S.N. Dmitriev, M.G. Itkis, N.D. Kovrizhnykh, O.V. Petrushkin, A.N. Polyakov, M.V. Shumeiko, A.A. Voinov reports financial support was provided by Ministry of Science and Higher Education of the Russian Federation through the Grant No. 075-10-2020-117. K.P. Rykaczewski, T.T. King, J.B. Roberto, N.T. Brewer, R.K. Grzywacz reports financial support was provided by U.S. DOE Office of Nuclear Physics under DOE Contract No. DE-AC05-00OR22725 with UT Battelle, LLC. Z.G. Gan, Z.Y. Zhang, M.H. Huang, H.B. Yang reports financial support was provided by National Natural Science Foundation of China (Grant No. 11975279).

Keywords

  • Electromagnetic separators
  • Gas-filled separators
  • Nuclear reactions
  • Superheavy elements

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