First experiment at the Super Heavy Element Factory: High cross section of Mc 288 in the Am 243 + Ca 48 reaction and identification of the new isotope Lr 264
Oganessian Yu.T. Utyonkov V.K. Kovrizhnykh N.D. Abdullin F.Sh. Dmitriev S.N. Ibadullayev D. Itkis M.G. Kuznetsov D.A. Petrushkin O.V. Podshibiakin A.V. Polyakov A.N. Popeko A.G. Sagaidak R.N. Schlattauer L. Shirokovski I.V. Shubin V.D. Shumeiko M.V. Solovyev D.I. Tsyganov Yu.S. Voinov A.A. Subbotin V.G. Bodrov A.Yu. SabelNikov A.V. Khalkin A.V. Zlokazov V.B. Rykaczewski K.P. King T.T. Roberto J.B. Brewer N.T. Grzywacz R.K. Gan Z.G. Zhang Z.Y. Huang M.H. Yang H.B.
September 2022American Physical Society
Physical Review C
2022#106Issue 3
We present results of the first experiment aimed at the synthesis of Mc isotopes in the Am243+Ca48 reaction performed at the new gas-filled separator DGFRS-2 online to the new cyclotron DC280 at the Super Heavy Element Factory at JINR. Fifty-five new decay chains of Mc288 and six chains assigned to Mc289 were detected. The α decay of Db268 with an energy of 7.6-8.0 MeV, half-life of 16-4+6h, and a branch of 55-15+20% was registered for the first time, and a new spontaneously fissioning isotope Lr264 with a half-life of 4.9-1.3+2.1h was identified. The cross section for the Am243(Ca48,3n)Mc288 reaction was measured to be 17.1-4.7+6.3 pb, which is the largest value for the known superheavy nuclei at the island of stability.
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Joint Institute for Nuclear Research, Dubna, RU-141980, Russian Federation
L.N. Gumilyov Eurasian National University, Nur-Sultan, 010000, Kazakhstan
Palacky University Olomouc, Department of Experimental Physics, Faculty of Science, Olomouc, 771 46, Czech Republic
Oak Ridge National Laboratory, Oak Ridge, 37831, TN, United States
Department of Physics and Astronomy, University of Tennessee, Knoxville, 37996, TN, United States
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
Joint Institute for Nuclear Research
L.N. Gumilyov Eurasian National University
Palacky University Olomouc
Oak Ridge National Laboratory
Department of Physics and Astronomy
Institute of Modern Physics
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