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17 results on '"Itkis, M. G."'

1. 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

2. Quasifission processes in Ca-40,Ca-48+Sm-144,Sm-154 reactions

Author

Knyazheva, G. N., Kozulin, E. M., Sagaidak, R. N., CHIZHOV A., Yu, Itkis, M. G., Kondratiev, N. A., Voskressensky, V. M., Stefanini, A. M., Behera, B. R., Corradi, L, Fioretto, E, Gadea, A, Latina, A, Szilner, S, Trotta, M, Beghini, S, Montagnoli, Giovanna, Scarlassara, Fernando, Haas, F, Rowley, N, Gomes, P. R. S., and SZANTO DE TOLEDO, A.

Published
2007

3. 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 Theory, Physics::Atomic and Molecular Clusters, FOS: Physical sciences, Nuclear Experiment (nucl-ex), 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
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4. Fission and quasi-fission of nuclei produced in the reactions with 48Ca ions

Author

Itkis, I., Bogatchev, A. A., Chizhov, A. Y. U., Itkis, M. G., Kliman, J., Knyajeva, G. N., Kondratiev, N. A., Kozulin, E. M., Korzyukov, I. V., Krupa, L., Oganessian, Y. U. T. S., Pokrovski, I. V., Prokhorova, E. V., Sagaidak, R. N., Voskresenski, V. M., Rusanov, A. Y. A., Corradi, L., Kumar, V., Stefanini, A. M., Trotta, M., Beghini, S., Montagnoli, G., Scarlassara, F., Chubarian, G., Hanappe, F., Materna, T., Rowley, N., Stuttg, L., and Giardina, Giorgio 42

Published
2003

6. Synthesis of new isotope of superheavy element using a 48Ca beam at FLNR JINR

Author

Oganessian, Y. U. T. S., Yeremin, A. V., Popeko, A. G., Chelnokov, M. L., Chepigin, V. I., Gorshkov, V. A., Itkis, M. G., Kabachenko, A. P., Lavrentev, A. Y. U., Malyshev, O. N., Rohac, J., Sagaidak, R. N., Hofmann, S., Muenzenberg, G., Saro, S., Giardina, Giorgio 42, and Morita, K.

Published
2000

9. Synthesis of superheavy nuclei in 48CA-induced reactions

Author

Oganessian, Y. T., Utyonkov, V. K., Lobanov, Y. V., Abdullin, F. S., Polyakov, A. N., Sagaidak, R. N., Shirokovsky, I. V., Tsyganov, Y. S., Voinov, A. A., Gulbekian, G. G., Bogomolov, S. L., Gikal, B. N., Mezentsev, A. N., Iliev, S., Subbotin, V. G., Sukhov, A. M., Subotic, K., Zagrebaev, V. I., Vostokin, G. K., Itkis, M. G., Moody, K. J., Patin, J. B., Dawn Shaughnessy, Stoyer, M. A., Stoyer, N. J., Wilk, P. A., Kenneally, J. M., Landrum, J. H., Wild, J. F., and Lougheed, R. W.

10. Unexpected entrance-channel effect in the fission of 216Ra

Author

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

11. Experiments on the synthesis of element 115 in the reaction 243Am(48Ca,xn)291-x115

Author

Oganessian, Yu Ts, Utyonkoy, V. K., Lobanov, Yu V., Abdullin, F. Sh, Polyakov, A. N., Shirokovsky, I. V., Tsyganov, Yu S., Gulbekian, G. G., Bogomolov, S. L., 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., Mark Stoyer, Stoyer, N. J., Shaughnessy, D. A., Kenneally, J. M., and Lougheed, R. W.

13. Observation of cluster decay of 242Cm

Author

Alexey Ogloblin, Bonetti, R., Denisov, V. A., Guglielmetti, A., Itkis, M. G., Mazzocchi, C., Mikheev, V. L., Oganessian, Yu Ts, Pik-Pichak, G. A., Poli, G., Pirozhkov, S. M., Semochkin, V. M., Shigin, V. A., Shvetsov, I. K., and Tretyakova, S. P.

14. Erratum: Publisher's Note: Experiments on the synthesis of element 115 in the reaction 243Am(48Ca,xn)291-x115 (Physical Review C - Nuclear Physics (2004) 69 (021601R))

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., 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., Mark Stoyer, Stoyer, N. J., Shaughnessy, D. A., Kenneally, J. M., and Lougheed, R. W.

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

Author

K. V. Novikov, B. Gall, M. G. Itkis, G. N. Knyazheva, M. Cheralu, I. M. Harca, Emanuele Vardaci, I. M. Itkis, N. Tortorelli, I. N. Diatlov, Zouhair Asfari, I. V. Vorobiev, Deepak Kumar, A. V. Karpov, I. V. Pchelintsev, Vladimir Loginov, N. I. Kozulina, A. Bondarchenko, Pushpendra Singh, C. Borcea, S. Heinz, E. M. Kozulin, Wladyslaw Henryk Trzaska, 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., Harca, I., Institut Pluridisciplinaire Hubert Curien (IPHC), and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, Physics, 010308 nuclear & particles physics, Fission, Hadron, Composite number, General Physics and Astronomy, Coulomb barrier, Actinide, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Ion, 0103 physical sciences, Production (computer science), Atomic physics, Energy (signal processing)
Abstract

International audience; The mass, energy and angular distributions of binary fragments formed in the reactions $^{64}$Ni + $^{238}$U, $^{58}$Fe + $^{244}$Pu, $^{52}$Cr + $^{248}$Cm, $^{54}$Cr + $^{248}$Cm at energies near the Coulomb barrier have been measured. The analysis of energy distributions of the symmetric fragments with mass numbers ${{{{A}_{{{\text{CN}}}}}} \mathord{\left/ {\vphantom {{{{A}_{{{\text{CN}}}}}} 2}} \right. \kern-0em} 2} \pm 20$ formed in these reactions have been applied to separate compound nucleus fission and quasi-fission. The estimated fusion probability for the reactions Cr, Fe, and Ni ions with actinide targets shows an exponential dependence on the mean fissility parameter of the system and shows also that reaction with Cr ions is more favorable for production of the super heavy element with Z = 120.

Published
2020

16. Fission and quasifission toward the superheavy mass region

Author

M. G. Itkis, I. M. Itkis, G. N. Knyazheva, Emanuele Vardaci, E. M. Kozulin, Vardaci, E, Itkis, M G, Itkis, I M, Knyazheva, G, and Kozulin, E M

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Fission, superheavy elements, fission, quasifission, Superheavy Elements
Abstract

The pathway toward the production of superheavy elements (SHE) crosses with the one of an in-depth study of the fission and quasifission processes. Quasifission affects the probability of forming a compound nucleus (CN) after capture and fission plays a decisive role during the cooling of the CN. To search for optimal reactions to produce SHE in fusion reactions and to provide an estimate of their production cross section measurements of the capture and fusion cross sections along with the survival probabilities are a mandatory task. Here an overview of the impact of fission and quasifission over the synthesis of SHE is discussed along with the need to perform measurements over a wide range of masses and energies.

Published
2019

17. Proton induced fission of 232Th at intermediate energies

Author

E. Piasecki, K. B. Gikal, G. N. Knyazhev, S. K. Sahiev, K. V. Kovalchuk, N. T. Burtebaev, M. G. Itkis, Emanuele Vardaci, A. V. Edomskiy, I. M. Itkis, T. N. Kvochkina, E. M. Kozulin, Wladyslaw Henryk Trzaska, V. A. Rubchenya, A. A. Bogachev, Gikal, K. B., Kozulin, E. M., Bogachev, A. A., Burtebaev, N. T., Edomskiy, A. V., Itkis, I. M., Itkis, M. G., Knyazhev, G. N., Kovalchuk, K. V., Kvochkina, T. N., Piasecki, E., Rubchenya, V. A., Sahiev, S. K., Trzaska, W. H., and Vardaci, Emanuele

Subjects
Nuclear and High Energy Physics, Cold fission, fission dynamics, Proton, Fission, Nuclear Theory, Cyclotron, 01 natural sciences, law.invention, Nuclear physics, induced fission, law, 0103 physical sciences, Proton emission, Nuclear Experiment, 010306 general physics, Physics, Range (particle radiation), Cluster decay, Mass distribution, ta114, 010308 nuclear & particles physics, mass-energy distributions, Atomic and Molecular Physics, and Optics, proton and neutron, Physics::Accelerator Physics, Atomic physics
Abstract

The mass-energy distributions and cross sections of proton-induced fission of Th-232 have been measured at the proton energies of 7, 10, 13, 20, 40, and 55 MeV. Experiments were carried out at the proton beam of the K-130 cyclotron of the JYFL Accelerator Laboratory of the University of Jyvakyla and U-150m cyclotron of the Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan. The yields of fission fragments in the mass range A = 60- 170 a.m.u. have been measured up to the level of 10(-4)%. The three humped shape of the mass distribution up has been observed at higher proton energies. The contribution of the symmetric component grows up with increasing proton incident energy; although even at 55 MeV of proton energy the shoulders in the mass energy distribution clearly indicate the asymmetric fission peaks. Evolution of shell structure was observed in the fission fragment mass distributions even at high excitation energy.

Published
2016

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