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1. Study of the 242Pu + 48Ca Reaction at Super Heavy Element Factory

Author

Ibadullayev, D., Utyonkov, V. K., Oganessian, Yu. Ts., Abdullin, F. Sh., Dmitriev, S. N., Itkis, M. G., Karpov, A. V., Kovrizhnykh, N. D., Kuznetsov, D. A., Petrushkin, O. V., Podshibiakin, A. V., Polyakov, A. N., Popeko, A. G., Sagaidak, R. N., Schlattauer, L., Shubin, V. D., Shumeiko, M. V., Solovyev, D. I., Tsyganov, Yu. S., Voinov, A. A., Subbotin, V. G., Bodrov, A. Yu., Sabel’nikov, A. V., Giniyatova, Sh. G., and Kuterbekov, K. A.

Published
2023
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2. First Experiment at the Super Heavy Element Factory: New Data from the 243Am + 48Ca Reaction

Author

Kovrizhnykh, N. D., Oganessian, Yu. Ts., Utyonkov, V. K., Abdullin, F. Sh., Dmitriev, S. N., Dzhioev, A. A., Ibadullayev, D., Itkis, M. G., Karpov, A. V., Kuznetsov, D. A., Petrushkin, O. V., Podshibiakin, A. V., Polyakov, A. N., Popeko, A. G., Rogov, I. S., Sagaidak, R. N., Schlattauer, L., Shubin, V. D., Shumeiko, M. V., Solovyev, D. I., Tsyganov, Yu. S., Voinov, A. A., Subbotin, V. G., Bodrov, A. Yu., Sabel’nikov, A. V., and Khalkin, A. V.

Published
2023
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4. Erratum to: Study of the 242Pu + 48Ca Reaction at Super Heavy Element Factory

Author

Ibadullayev, D., Utyonkov, V. K., Oganessian, Yu. Ts., Abdullin, F. Sh., Dmitriev, S. N., Itkis, M. G., Karpov, A. V., Kovrizhnykh, N. D., Kuznetsov, D. A., Petrushkin, O. V., Podshibiakin, A. V., Polyakov, A. N., Popeko, A. G., Sagaidak, R. N., Schlattauer, L., Shubin, V. D., Shumeiko, M. V., Solovyev, D. I., Tsyganov, Yu. S., Voinov, A. A., Subbotin, V. G., Bodrov, A. Yu., Sabel’nikov, A. V., Giniyatova, Sh. G., and Kuterbekov, K. A.

Published
2024
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8. Erratum to: Study of Binary Processes in the Reactions of 36Ar + 144, 154Sm and 68Zn + 112Sn Leading to the Formation of Neutron-Deficient Compound 180, 190Hg Nuclei

Author

Bogachev, A. A., Kozulin, E. M., Knyazheva, G. N., Itkis, I. M., Novikov, K. V., Banerjee, T., Cheralu, M., Itkis, M. G., Mukhamejanov, Y., Kumar, D., Pan, A., Pchelintsev, I. V., Vorob’ev, I. V., Trzaska, W. H., Vardaci, E., di Nitto, A., Khlebnikov, S. V., Harka, I., and Andreyev, A.

Published
2022
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10. Formation and Decay of the Composite System Z = 120 in Reactions with Heavy Ions at Energies Near the Coulomb Barrier

Author

Novikov, K. V., Kozulin, E. M., Knyazheva, G. N., Itkis, I. M., Karpov, A. V., Itkis, M. G., Diatlov, I. N., Cheralu, M., Gall, B., Asfari, Z., Kozulina, N. I., Kumar, D., Pchelintsev, I. V., Loginov, V. N., Bondarchenko, A. E., Singh, P. P., Vorobiev, I. V., Heinz, S., Trzaska, W. H., Vardaci, E., Tortorelli, N., Borcea, C., and Harca, I.

Published
2020
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11. Synthesizing and Studying Superheavy Nuclei 294Ts and 294Og

Author

Voinov, A. A., Utyonkov, V. K., Oganessian, Yu. Ts., Abdullin, F. Sh., Polyakov, A. N., Tsyganov, Yu. S., Shirokovsky, I. V., Sagaidak, R. N., Subbotin, V. G., Dmitriev, S. N., Itkis, M. G., Shumeiko, M. V., Kovrizhnykh, N. D., Sabelnikov, A. V., and Vostokin, G. K.

Published
2020
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12. Start-Up of the DC-280 Cyclotron, the Basic Facility of the Factory of Superheavy Elements of the Laboratory of Nuclear Reactions at the Joint Institute for Nuclear Research

Author

Gulbekian, G. G., Dmitriev, S. N., Itkis, M. G., Oganessyan, Yu. Ts., Gikal, B. N., Kalagin, I. V., Semin, V. A., Bogomolov, S. L., Buzmakov, V. A., Ivanenko, I. A., Kazarinov, N. Yu., Osipov, N. F., Pashenko, S. V., Sokolov, V. A., Pchelkin, N. N., Prokhorov, S. V., Khabarov, M. V., and Gikal, K. B.

Published
2019
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13. New isotope Ds276 and its decay products Hs272 and Sg268 from the Th232+Ca48 reaction

Author

Oganessian, Yu. Ts., primary, Utyonkov, V. K., additional, Shumeiko, M. V., additional, Abdullin, F. Sh., additional, Dmitriev, S. N., additional, Ibadullayev, D., additional, Itkis, M. G., additional, Kovrizhnykh, N. D., additional, Kuznetsov, D. A., additional, Petrushkin, O. V., additional, Podshibiakin, A. V., additional, Polyakov, A. N., additional, Popeko, A. G., additional, Rogov, I. S., additional, Sagaidak, R. N., additional, Schlattauer, L., additional, Shubin, V. D., additional, Solovyev, D. I., additional, Tsyganov, Yu. S., additional, Voinov, A. A., additional, Subbotin, V. G., additional, Bublikova, N. S., additional, Voronyuk, M. G., additional, Sabelnikov, A. V., additional, Bodrov, A. Yu., additional, Gan, Z. G., additional, Zhang, Z. Y., additional, Huang, M. H., additional, and Yang, H. B., additional

Published
2023
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14. Reaction 48Ca+208Pb: the capture-fission cross-sections and the mass-energy distributions of fragments above and deep below the Coulomb barrier

Author

Prokhorova, E. V., Cherepanov, E. A., Itkis, M. G., Kondratiev, N. A., Kozulin, E. M., Krupa, L., Oganessian, Yu. Ts., Pashkevich, V. V., Pokrovsky, I. V., and Rusanov, A. Ya.

Subjects
Nuclear Experiment
Abstract

The capture-fission cross-sections in an energy range of 206-242 MeV of 48Ca-projectiles and mass-energy distributions (MEDs) of reaction products in an energy range of 211-242 MeV have been measured in the 48Ca+208Pb reaction using the double-arm time-of-flight spectrometer CORSET. The MEDs of fragments for heated fission were shown to consist of two components. One component, which is due to classical fusion-fission, is associated with the symmetric fission of the 256No compound nucleus. The other component, which appears as ''shoulders'', is associated with the quasi-fission process and can be named ''quasi-fission shoulders''. Those quasi-fission shoulders enclose light fragments whose masses are 60-90 a.m.u. The total kinetic energy (TKE) of the fragments that belong to the shoulders is higher than the value expected for a classical fusion-fission process. We have come to the conclusion that in quasi-fission, spherical shells with Z=28 and N=50 play a great role. It has also been demonstrated that the properties of the MEDs of fragments formally agree with a well-known hypothesis of two independent fission modes; in this case the modes are normal fusion-fission and quasi-fission processes. A high-energetic Super-Short mode of classical fission has been found at low excitation energies in the mass range of heavy fragments M = 130-135 and TKE = 233 MeV; however the yield associated with this mode is small., Comment: 33 pages, 24 eps figures, RevTeX4, submitted to Phys. Rev

Published
2003

17. Study of the 242Pu + 48Ca Reaction at Super Heavy Element Factory.

Author

Ibadullayev, D., Utyonkov, V. K., Oganessian, Yu. Ts., Abdullin, F. Sh., Dmitriev, S. N., Itkis, M. G., Karpov, A. V., Kovrizhnykh, N. D., Kuznetsov, D. A., Petrushkin, O. V., Podshibiakin, A. V., Polyakov, A. N., Popeko, A. G., Sagaidak, R. N., Schlattauer, L., Shubin, V. D., Shumeiko, M. V., Solovyev, D. I., Tsyganov, Yu. S., and Voinov, A. A.

Abstract

Experiments on the synthesis of isotopes of element 114 in the 242Pu + 48Ca reaction were carried out at a new gas-filled separator DGFRS-2 online to the DC-280 cyclotron of the Superheavy Element Factory at the Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research. The decay properties of 286Fl and 287Fl, as well as their α-decay products, were refined. The possibility of the existence of isomeric states in successive α-decays of 287Fl is discussed. The maximum cross section of pb was measured for the 242Pu(48Ca, 3n)287Fl reaction. [ABSTRACT FROM AUTHOR]

Published
2023
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18. First Experiment at the Super Heavy Element Factory: New Data from the 243Am + 48Ca Reaction.

Author

Kovrizhnykh, N. D., Oganessian, Yu. Ts., Utyonkov, V. K., Abdullin, F. Sh., Dmitriev, S. N., Dzhioev, A. A., Ibadullayev, D., Itkis, M. G., Karpov, A. V., Kuznetsov, D. A., Petrushkin, O. V., Podshibiakin, A. V., Polyakov, A. N., Popeko, A. G., Rogov, I. S., Sagaidak, R. N., Schlattauer, L., Shubin, V. D., Shumeiko, M. V., and Solovyev, D. I.

Abstract

We presented the results of the series of experiments on the synthesis of Mc isotopes in the 243Am + 48Ca reaction performed at the new separator DGFRS-2 and cyclotron DC280 of the SHE Factory at FLNR JINR. There were registered 110 new 288Mc decay chains, 10 289Mc chains, and 4 287Mc chains. Alpha decay of 268Db with an energy of 7.6–8.0 MeV, half-life h and α-branch % was registered for the first time together with a new spontaneously fissioning isotope 264Lr with a half-life of h The measured cross section of the 243Am(48Ca, 3n)288Mc reaction was pb, which is the largest for known superheavy nuclei. A new isotope 286Mc was synthesized with a half-life of 20 ms and an α-particle energy of 10.71 ± 0.02 MeV. Spontaneous fission of 279Rg was first observed in one of the four new decay chains of 287Mc. The reaction excitation function was measured at six 48Ca energies in the range of 239–259 MeV, which led to the first observation of the 5n channel with a cross section of 0.5 pb. The decay properties of 20 previously known isotopes have been determined with higher accuracy. [ABSTRACT FROM AUTHOR]

Published
2023
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19. New isotope Mc286 produced in the Am243+Ca48 reaction

Author

Oganessian, Yu. Ts., primary, Utyonkov, V. K., additional, Kovrizhnykh, N. D., additional, Abdullin, F. Sh., additional, Dmitriev, S. N., additional, Dzhioev, A. A., additional, Ibadullayev, D., additional, Itkis, M. G., additional, Karpov, A. V., additional, Kuznetsov, D. A., additional, Petrushkin, O. V., additional, Podshibiakin, A. V., additional, Polyakov, A. N., additional, Popeko, A. G., additional, Rogov, I. S., additional, Sagaidak, R. N., additional, Schlattauer, L., additional, Shubin, V. D., additional, Shumeiko, M. V., additional, Solovyev, D. I., additional, Tsyganov, Yu. S., additional, Voinov, A. A., additional, Subbotin, V. G., additional, Bodrov, A. Yu., additional, Sabel'nikov, A. V., additional, Khalkin, A. V., additional, Rykaczewski, K. P., additional, King, T. T., additional, Roberto, J. B., additional, Brewer, N. T., additional, Grzywacz, R. K., additional, Gan, Z. G., additional, Zhang, Z. Y., additional, Huang, M. H., additional, and Yang, H. B., additional

Published
2022
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22. First experiment at the Super Heavy Element Factory: High cross section of Mc288 in the Am243+Ca48 reaction and identification of the new isotope Lr264

Author

Oganessian, Yu. Ts., primary, Utyonkov, V. K., additional, Kovrizhnykh, N. D., additional, Abdullin, F. Sh., additional, Dmitriev, S. N., additional, Ibadullayev, D., additional, Itkis, M. G., additional, Kuznetsov, D. A., additional, Petrushkin, O. V., additional, Podshibiakin, A. V., additional, Polyakov, A. N., additional, Popeko, A. G., additional, Sagaidak, R. N., additional, Schlattauer, L., additional, Shirokovski, I. V., additional, Shubin, V. D., additional, Shumeiko, M. V., additional, Solovyev, D. I., additional, Tsyganov, Yu. S., additional, Voinov, A. A., additional, Subbotin, V. G., additional, Bodrov, A. Yu., additional, Sabel'nikov, A. V., additional, Khalkin, A. V., additional, Zlokazov, V. B., additional, Rykaczewski, K. P., additional, King, T. T., additional, Roberto, J. B., additional, Brewer, N. T., additional, Grzywacz, R. K., additional, Gan, Z. G., additional, Zhang, Z. Y., additional, Huang, M. H., additional, and Yang, H. B., additional

Published
2022
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23. Investigation of Ca48 -induced reactions with Pu242 and U238 targets at the JINR Superheavy Element Factory

Author

Oganessian, Yu. Ts., primary, Utyonkov, V. K., additional, Ibadullayev, D., additional, Abdullin, F. Sh., additional, Dmitriev, S. N., additional, Itkis, M. G., additional, Karpov, A. V., additional, Kovrizhnykh, N. D., additional, Kuznetsov, D. A., additional, Petrushkin, O. V., additional, Podshibiakin, A. V., additional, Polyakov, A. N., additional, Popeko, A. G., additional, Sagaidak, R. N., additional, Schlattauer, L., additional, Shubin, V. D., additional, Shumeiko, M. V., additional, Solovyev, D. I., additional, Tsyganov, Yu. S., additional, Voinov, A. A., additional, Subbotin, V. G., additional, Bodrov, A. Yu., additional, Sabel'nikov, A. V., additional, Lindner, A., additional, Rykaczewski, K. P., additional, King, T. T., additional, Roberto, J. B., additional, Brewer, N. T., additional, Grzywacz, R. K., additional, Gan, Z. G., additional, Zhang, Z. Y., additional, Huang, M. H., additional, and Yang, H. B., additional

Published
2022
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24. Fission of Hg-180,Hg-182,Hg-183* and Pt-178* nuclei at intermediate excitation energies

Author

Kozulin E. M., Knyazheva G. N., Itkis I. M., Itkis M. G., Mukhamejanov Y. S., Bogachev A. A., Novikov K. V., Kirakosyan V. V., Kumar D., Banerjee T., Cheralu M., Maiti M., Prajapat R., Kumar R., Sarkar G., Trzaska W. H., Andreyev A. N., Harca I. M., Mitu A., Vardaci E., Kozulin, E. M., Knyazheva, G. N., Itkis, I. M., Itkis, M. G., Mukhamejanov, Y. S., Bogachev, A. A., Novikov, K. V., Kirakosyan, V. V., Kumar, D., Banerjee, T., Cheralu, M., Maiti, M., Prajapat, R., Kumar, R., Sarkar, G., Trzaska, W. H., Andreyev, A. N., Harca, I. M., Mitu, A., and Vardaci, E.

Abstract

Background: The nature of asymmetric fission of preactinides is not yet understood in detail, despite intense experimental and theoretical studies carried out at present. Purpose: The study of asymmetric and symmetric fission of Hg180,182,183 and Pt178 nuclei as a function of their excitation energy and isospin. Methods: Mass-energy distributions of fission fragments of Hg180, Pt178 (two protons less than Hg180), and Hg182 (two neutrons more than Hg180) formed in the Ar36+Sm144, Nd142, and Ca40+Nd142 reactions were measured at energies near and above the Coulomb barrier. Fission of Hg183 obtained in the reaction of Ca40 with Nd143 was also investigated to see if one extra neutron could lead to dramatic changes in the fission process due to the shape-staggering effect in radii, known in Hg183. The measurements were performed with the double-arm time-of-flight spectrometer CORSET. Results: The observed peculiarities in the fission fragment mass-energy distributions for all studied nuclei may be explained by the presence of a symmetric fission mode and three asymmetric fission modes, manifested by the different total kinetic energies and fragment mass splits. The yield of symmetric mode grows with increasing excitation energy of compound nucleus. Conclusions: The investigated properties of asymmetric fission of Hg180,182,183 and Pt178 nuclei point out the existence of well-deformed proton shell at Z≈36 and a less deformed proton shell at Z ≈ 46.

Published
2022

25. Fusion hindrance and quasi-fission in 48Ca induced reactions : Implications for super-heavy element production

Author

Trotta, M., Stefanini, A. M., Beghini, S., Behera, B. R., Chizhov, A. Yu., Corradi, L., Courtin, S., Fioretto, E., Gadea, A., Gomes, P. R. S., Haas, F., Itkis, I. M., Itkis, M. G., Kniajeva, G. N., Kondratiev, N. A., Kozulin, E. M., Latina, A., Montagnoli, G., Pokrovsky, I. V., Rowley, N., Sagaidak, R. N., Scarlassara, F., Szanto de Toledo, A., Szilner, S., Voskressensky, V. M., Wu, Y. W., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
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26. New elements from Dubna

Author

Oganessian, Yu. Ts., Utyonkov, V. K., Lobanov, Yu. V., Abdullin, F. Sh., Polyakov, A. N., Shirokovsky, I. V., Tsyganov, Yu. S., Gulbekian, G. G., Bogomolov, S. L., Gikal, B. N., Mezentsev, A. N., Iliev, S., Subbotin, V. G., Sukhov, A. M., Voinov, A. A., Buklanov, G. V., Subotic, K., Zagrebaev, V. I., Itkis, M. G., Patin, J. B., Moody, K. J., Wild, J. F., Stoyer, M. A., Stoyer, N. J., Shaughnessy, D. A., Kenneally, J. M., Wilk, P. A., Lougheed, R. W., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
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28. Superheavy Elements — Status of Research in Dubna

Author

Oganessian, Yu. Ts., Utyonkov, V. K., Lobanov, Yu. V., Abdullin, F. Sh., Polyakov, A. N., Shirokovsky, I. V., Tsyganov, Yu. S., Gulbekian, G. G., Bogomolov, S. L., Gikal, B. N., Mezentsev, A. N., Iliev, S., Subbotin, V. G., Sukhov, A. M., Voinov, A. A., Buklanov, G. V., Subotic, K., Itkis, M. G., Moody, K. J., Wild, J. F., Stoyer, N. J., Stoyer, M. A., Lougheed, R. W., Laue, C. A., Patin, J. B., Shaughnessy, D. A., Kenneally, J. M., and Klapdor-Kleingrothaus, Hans Volker, editor

Published
2004
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29. Synthesis of superheavy nuclei in the reactions of 244Pu and 248Cm with 48Ca

Author

Oganessian, Yu. Ts., Utyonkov, V. K., Lobanov, Yu. V., Abdullin, F. Sh., Polyakov, A. N., Shirokovsky, I. V., Tsyganov, Yu. S., Gulbekian, G. G., Bogomolov, S. L., Gikal, B. N., Mezentsev, A. N., Iliev, S., Subbotin, V. G., Sukhov, A. M., Ivanov, O. V., Buklanov, G. V., Subotic, K., Voinov, A. A., Itkis, M. G., Moody, K. J., Wild, J. F., Stoyer, N. J., Stoyer, M. A., Lougheed, R. W., Laue, C. A., Äystö, Juha, editor, Dendooven, Peter, editor, Jokinen, Ari, editor, and Leino, Matti, editor

Published
2003
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31. Asymmetric and symmetric fission of excited nuclei of Hg 180,190 and Pb 184,192,202 formed in the reactions with Ar 36 and Ca 40,48 ions

Author

Bogachev A. A., Kozulin E. M., Knyazheva G. N., Itkis I. M., Itkis M. G., Novikov K. V., Kumar D., Banerjee T., Diatlov I. N., Cheralu M., Kirakosyan V. V., Mukhamejanov Y. S., Pan A. N., Pchelintsev I. V., Tikhomirov R. S., Vorobiev I. V., Maiti M., Prajapat R., Kumar R., Sarkar G., Trzaska W. H., Andreyev A. N., Harca I. M., Vardaci E., Bogachev, A. A., Kozulin, E. M., Knyazheva, G. N., Itkis, I. M., Itkis, M. G., Novikov, K. V., Kumar, D., Banerjee, T., Diatlov, I. N., Cheralu, M., Kirakosyan, V. V., Mukhamejanov, Y. S., Pan, A. N., Pchelintsev, I. V., Tikhomirov, R. S., Vorobiev, I. V., Maiti, M., Prajapat, R., Kumar, R., Sarkar, G., Trzaska, W. H., Andreyev, A. N., Harca, I. M., and Vardaci, E.

Abstract

Background: Observation of asymmetric fission of Hg180 has led to intensive theoretical and experimental studies of fission of neutron-deficient nuclei in the lead region. Purpose: The study of asymmetric and symmetric fission modes of Hg180,190 and Pb184,192,202 nuclei. Methods: Mass-energy distributions of fission fragments of Hg180,190 and Pb184 formed in the Ar36+Sm144,154 and Ca40+Sm144 reactions, respectively, at energies near the Coulomb barrier have been measured using the double-arm time-of-flight spectrometer CORSET and compared with previously measured Pb192,202 isotopes produced in the Ca48+Sm144,154 reactions. The mass distributions for Hg180,190 and Pb184,192,202 together with old data for Ir187, Au195, Hg198, Tl201, Bi205,207, Po210, and At213 [J. Nucl. Phys. 53, 1225 (1991)] have been decomposed into symmetric and asymmetric fission modes. The total kinetic-energy distributions for different fission fragment mass regions have been analyzed for Hg180,190 and Pb184. Results: The stabilization role of proton numbers at Z≈36, 38, Z≈45, 46, and Z=28/50 in asymmetric fission of excited preactinide nuclei has been observed. The high (≈145-MeV) and the low (≈128-MeV) energy components have been found in the total kinetic-energy distributions of Hg180,190 fission fragments corresponding to the fragments with proton numbers near Z≈46 and Z≈36, respectively. In the case of fission of Pb184 only the low-energy component (≈135MeV) for the fragments with masses corresponding to the proton numbers Z≈36 and 46 has been found. Conclusions: The studied properties of asymmetric fission of Hg180,190 and Pb184,192,202 nuclei point out the existence of well deformed proton shell at Z≈36 and less deformed proton shell at Z≈46.

Published
2021

32. Fission of Hg*180,182,183 and Pt*178 nuclei at intermediate excitation energies

Author

Kozulin, E. M., primary, Knyazheva, G. N., additional, Itkis, I. M., additional, Itkis, M. G., additional, Mukhamejanov, Y. S., additional, Bogachev, A. A., additional, Novikov, K. V., additional, Kirakosyan, V. V., additional, Kumar, D., additional, Banerjee, T., additional, Cheralu, M., additional, Maiti, M., additional, Prajapat, R., additional, Kumar, R., additional, Sarkar, G., additional, Trzaska, W. H., additional, Andreyev, A. N., additional, Harca, I. M., additional, Mitu, A., additional, and Vardaci, E., additional

Published
2022
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33. Asymmetric and symmetric fission of excited nuclei of 180,190Hg and 184,192,202Pb formed in the reactions with 36Ar and 40,48Ca ions

Author

Bogachev, A. A., Kozulin, E. M., Knyazheva, G. N., Itkis, I. M., Itkis, M. G., Novikov, K. V., Kumar, D., Banerjee, T., Diatlov, I. N., Cheralu, M., Kirakosyan, V. V., Mukhamejanov, Y. S., Pan, A. N., Pchelintsev, I. V., Tikhomirov, R. S., Vorobiev, I. V., Maiti, M., Prajapat, R., Sarkar, G., Trzaska, W. H., Andreyev, A. N., Harca, I. M., and Vardaci, E.

Published
2021

35. Separation efficiency of the MASHA facility for short-lived mercury isotopes

Author

Rodin, A. M., Belozerov, A. V., Chernysheva, E. V., Dmitriev, S. N., Gulyaev, A. V., Gulyaeva, A. V., Itkis, M. G., Kliman, J., Kondratiev, N. A., Krupa, L., Novoselov, A. S., Oganessian, Yu. Ts., Podshibyakin, A. V., Salamatin, V. S., Siváček, I., Stepantsov, S. V., Vanin, D. V., Vedeneev, V. Yu., Yukhimchuk, S. A., Granja, C., and Pospisil, S.

Published
2014
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36. Investigation of fusion probabilities in the reactions with Cr52,54, Ni64, and Zn68 ions leading to the formation of Z=120 superheavy composite systems

Author

Novikov, K. V., Kozulin, E. M., Knyazheva, G. N., Itkis, I. M., Itkis, M. G., Bogachev, A. A., Diatlov, I. N., Cheralu, M., Kumar, D., Kozulina, N. I., Pan, A. N., Pchelintsev, I. V., Vorobiev, I. V., Trzaska, W. H., Heinz, S., Devaraja, H. M., Lommel, B., Vardaci, E., Spinosa, S., Di Nitto, A., Pulcini, A., Khlebnikov, S. V., Singh, Pushpendra P., Sahoo, Rudra N., Gall, B., Asfari, Z., Borcea, C., Harca, I., Filipescu, D. M., Novikov, K. V., Kozulin, E. M., Knyazheva, G. N., Itkis, I. M., Itkis, M. G., Bogachev, A. A., Diatlov, I. N., Cheralu, M., Kumar, D., Kozulina, N. I., Pan, A. N., Pchelintsev, I. V., Vorobiev, I. V., Trzaska, W. H., Heinz, S., Devaraja, H. M., Lommel, B., Vardaci, E., Spinosa, S., Di Nitto, A., Pulcini, A., Khlebnikov, S. V., Singh, Pushpendra P., Sahoo, Rudra N., Gall, B., Asfari, Z., Borcea, C., Harca, I., and Filipescu, D. M.

Abstract

Background: The formation of superheavy nuclei in fusion reactions is suppressed by a competing quasifission process. The competition between the formation of the compound nucleus and the quasifission depends strongly on the reaction entrance channel. Purpose: The investigation of fission and quasifission processes in the formation of Z=120 superheavy composite systems in the 52,54Cr+248Cm and 68Zn+232Th reactions, and their comparison with the 64Ni+238U reaction at energies in the vicinity of the Coulomb barrier. Methods: Mass-energy distributions of fissionlike fragments formed in the reactions 52,54Cr+248Cm and 68Zn+232Th at energies near the Coulomb barrier were measured using the double-arm time-of-flight spectrometer CORSET. Results: Capture cross sections for the reactions under investigation were measured. The most probable fragment masses and total kinetic energies as well as their variances in dependence on the interaction energy were studied for asymmetric and symmetric fragments. The fusion probabilities were estimated from the analysis of mass-energy distributions. Conclusions: The estimated fusion probability drops down by a factor of 103 in the 54Cr+248Cm reaction compared to the reactions of 48Ca ions with actinides. Among the studied reactions, the 54Cr+248Cm is the most favorable one for the production of the superheavy element with Z=120.

Published
2020

37. Asymmetric and symmetric fission of excited nuclei of Hg180,190 and Pb184,192,202 formed in the reactions with Ar36 and Ca40,48 ions

Author

Bogachev, A. A., primary, Kozulin, E. M., additional, Knyazheva, G. N., additional, Itkis, I. M., additional, Itkis, M. G., additional, Novikov, K. V., additional, Kumar, D., additional, Banerjee, T., additional, Diatlov, I. N., additional, Cheralu, M., additional, Kirakosyan, V. V., additional, Mukhamejanov, Y. S., additional, Pan, A. N., additional, Pchelintsev, I. V., additional, Tikhomirov, R. S., additional, Vorobiev, I. V., additional, Maiti, M., additional, Prajapat, R., additional, Kumar, R., additional, Sarkar, G., additional, Trzaska, W. H., additional, Andreyev, A. N., additional, Harca, I. M., additional, and Vardaci, E., additional

Published
2021
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43. Investigation of fusion probabilities in the reactions with 52,54Cr, 64Ni, and 68Zn ions leading to the formation of Z = 120 superheavy composite systems

Author

Novikov, K. V., Kozulin, E. M., Knyazheva, G. N., Itkis, I. M., Itkis, M. G., Bogachev, A. A., Diatlov, I. N., Cheralu, M., Kumar, D., Kozulina, N. I., Pan, A. N., Pchelintsev, I. V., Vorobiev, I. V., Trzaska, W. H., Heinz, S., Devaraja, H. M., Lommel, B., Vardaci, E., Spinosa, S., Di Nitto, A., Pulcini, A., Khlebnikov, S. V., Singh, Pushpendra P., Sahoo, Rudra, N., Gall, B., Asfari, Z., Borcea, C., Harca, I., and Filipescu, D. M.

Subjects
fissio, fuusioreaktio, low and intermediate energy heavy-ion reactions, ydinfysiikka, nuclear fusion
Abstract

Background: The formation of superheavy nuclei in fusion reactions is suppressed by a competing quasifission process. The competition between the formation of the compound nucleus and the quasifission depends strongly on the reaction entrance channel. Purpose: The investigation of fission and quasifission processes in the formation of Z=120 superheavy composite systems in the 52,54Cr+248Cm and 68Zn+232Th reactions, and their comparison with the 64Ni+238U reaction at energies in the vicinity of the Coulomb barrier. Methods: Mass-energy distributions of fissionlike fragments formed in the reactions 52,54Cr+248Cm and 68Zn+232Th at energies near the Coulomb barrier were measured using the double-arm time-of-flight spectrometer CORSET. Results: Capture cross sections for the reactions under investigation were measured. The most probable fragment masses and total kinetic energies as well as their variances in dependence on the interaction energy were studied for asymmetric and symmetric fragments. The fusion probabilities were estimated from the analysis of mass-energy distributions. Conclusions: The estimated fusion probability drops down by a factor of 103 in the 54Cr+248Cm reaction compared to the reactions of 48Ca ions with actinides. Among the studied reactions, the 54Cr+248Cm is the most favorable one for the production of the superheavy element with Z=120. peerReviewed

Published
2020

44. Chemical characterization of element 112

Author

Eichler, R., Aksenov, N. V., Belozerov, A. V., Bozhikov, G. A., Chepigin, V. I., Dmitriev, S. N., Dressler, R., Gaggeler, H. W., Gorshkov, V. A., Haenssler, F., Itkis, M. G., Laube, A., Lebedev, V. Ya., Malyshev, O. N., Oganessian, Yu. Ts., Petrushkin, O. V., Piguet, D., Rasmussen, P., Shishkin, S. V., Shutov, A. V., Svirikhin, A. I., Tereshatov, E. E., Vostokin, G. K., Wegrzecki, M., and Yeremin, A. V.

Subjects
Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Author(s): R. Eichler (corresponding author) [1, 2]; N. V. Aksenov [3]; A. V. Belozerov [3]; G. A. Bozhikov [3]; V. I. Chepigin [3]; S. N. Dmitriev [3]; R. Dressler [1]; [...]

Published
2007
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45. Shell effects in fusion-fission of heavy and superheavy nuclei

Author

Itkis, M. G., Beghini, S., Bogatchev, A. A., Corradi, L., Dorvaux, O., Hanappe, F., Gadea, A., Giardina, G., Itkis, I. M., Jandel, M., Kliman, J., Kniajeya, G. N., Kondratiev, N. A., Korzyukov, I. V., Kozulin, E. M., Krupa, L., Latina, L., Materna, T., Montagnoli, G., Oganessian, Yu. Ts., Pokrovsky, I. V., Prokhorova, E. V., Rowley, N., Rusanov, A. Ya., Scarlassara, F., Stefanini, A. M., Stuttgé, L., Szilner, S., Trotta, M., and Voskressenski, V. M.

Published
2004
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46. Second experiment at VASSILISSA separator on the synthesis of the element 112

Author

Oganessian, Yu Ts, Yeremin, A. V., Popeko, A. G., Malyshev, O. N., Belozerov, A. V., Buklanov, G. V., Chelnokov, M. L., Chepigin, V. I., Gorshkov, V. A., Hofmann, S., Itkis, M. G., Kabachenko, A. P., Kindler, B., Münzenberg, G., Sagaidak, R. N., Šáro, Š, Schött, H.-J., Štreicher, B., Shutov, A. V., Svirikhin, A. I., and Vostokin, G. K.

Published
2004
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47. Tracking dissipation in capture reactions

Author

Materna, T., Schmitt, C., Aritomo, Y., Bartel, J., Benoit, B., Bogatchev, A. A., de Goès Brennand, E., Dorvaux, O., Giardina, G., Hanappe, F., Itkis, M. G., Itkis, I. M., Kliman, J., Kniajeva, G. N., Kondratiev, N. A., Kozulin, E. M., Krupa, L., Oganessian, Yu. Ts., Pokrovsky, I. V., Prokhorova, E. V., Rowley, N., Siwek-Wilczynska, K., and Stuttgé, L.

Published
2003
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48. The effect of the entrance channel on the fission of 216Ra

Author

Pokrovsky, I. V., Chizhov, A. Yu., Itkis, M. G., Itkis, I. M., Kniajeva, G. N., Kozulin, E. M., Kondratiev, N. A., Sagaidak, R. N., Voskressensky, V. M., Corradi, L., Stefanini, A. M., Trotta, M., Vinodkumar, A. M., Beghini, S., Montagnoli, G., Scarlassara, F., Rusanov, A. Ya., Hanappe, F., Dorvaux, O., Rowley, N., and Stuttgé, L.

Published
2003
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50. Fusion-fission of heavy and superheavy nuclei

Author

Itkis, M. G., Beghini, S., Bogatchev, A. A., Corradi, L., Dorvaux, O., Gadea, A., Giardina, G., Goverdovski, A. A., Hanappe, F., Itkis, I. M., Jandel, M., Kliman, J., Kniajeva, G. N., Kondratiev, N. A., Korzyukov, I. V., Kozulin, E. M., Krupa, L., Latina, L., Materna, T., Montagnoli, G., Moody, K. J., Oganessian, Yu. Ts., Pokrovsky, I. V., Ponomarenko, V. A., Prokhorova, E. V., Rowley, N., Rusanov, A. Ya., Scarlassara, F., Stefanini, A. M., Stuttgé, L., Szilner, S., Trotta, M., Vinodkumar, A. M., and Voskressensky, V. M.

Published
2003
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