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120 results on '"Popeko, A.G."'

1. Average charge states of heavy ions in rarefied hydrogen

Author

Oganessian, Yu.Ts., Utyonkov, V.K., Solovyev, D.I., Abdullin, F.Sh., Dmitriev, S.N., Ibadullayev, D., Itkis, M.G., 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., Tsyganov, Yu.S., Voinov, A.A., Subbotin, V.G., Bodrov, A.Yu., Sabel’nikov, A.V., Rykaczewski, K.P., King, T.T., Roberto, J.B., Brewer, N.T., Grzywacz, R.K., Gan, Z.G., Zhang, Z.Y., Huang, M.H., and Yang, H.B.

Published
2023
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2. DGFRS-2—A gas-filled recoil separator for the Dubna Super Heavy Element Factory

Author

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

Published
2022
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3. Fission hindrances in transfermium nuclei

Author

Lopez-Martens A., Hauschild K., Svirikhin A.I., Asfari Z., Chelnokov M.L, Chepigin V.I., Dorvaux O., Forge M., Gall B., Isaev A.V., Izosimov I.N., Kessaci K., Kuznetsova A.A., Malyshev O.N., Mukhin R.S., Popeko A.G., Popov Yu.A., Sailaubekov B., Sokol E.A., Tezekbayeva M.S., and Yeremin A.V.

Subjects
Physics, QC1-999
Abstract

Very heavy nuclei owe their stability against spontaneous fission to quantum shell effects, which depend on the local density of single-particle states. The height but also the width and the structure of the barrier in multi-dimensional deformation space determine the fission half-lives. Other effects come into play, such as the conservation of quantum numbers and superfluidity or stiffness of the system in the fission process. This is why odd nuclei have longer fission partial half-lives with respect to their even neighbours and also why multi-quasi-particle states, such as high-K states, are thought to be more stable against fission than the ground state. We will report here on two different fission studies carried out with the GABRIELA detector array at the focal plane of the recoil separator SHELS. The first study concerns the fission properties of 253Rf, the most neutron deficient Rf isotope known to date. The second study focusses on a new measurement of the fission hindrance of the known 8- isomer in 254No.

Published
2023
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4. Structure of the prompt neutron multiplicity distribution in the spontaneous fission of 256Rf

Author

Isaev, A.V., primary, Mukhin, R.S., additional, Andreev, A.V., additional, Asfari, Z., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Devaraja, H.M., additional, Dorvaux, O., additional, Gall, B., additional, Hauschild, K., additional, Izosimov, I.N., additional, Kuznetsova, A.A., additional, Lopez-Martens, A., additional, Malyshev, O.N., additional, Popeko, A.G., additional, Popov, Yu.A., additional, Rahmatinejad, A., additional, Sailaubekov, B., additional, Shneidman, T.M., additional, Sokol, E.A., additional, Svirikhin, A.I., additional, Tezekbayeva, M.S., additional, Yeremin, A.V., additional, and Zamyatin, N.I., additional

Published
2023
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7. Structure of the prompt neutron multiplicity distribution in the spontaneous fission of Rf

Author

Isaev, A.V., Mukhin, R.S., Andreev, A.V., Asfari, Z., Chelnokov, M.L., Chepigin, V.I., Devaraja, H.M., Dorvaux, O., Gall, B., Hauschild, K., Izosimov, I.N., Kuznetsova, A.A., Lopez-Martens, A., Malyshev, O.N., Popeko, A.G., Popov, Yu.A., Rahmatinejad, A., Sailaubekov, B., Shneidman, T.M., Sokol, E.A., Svirikhin, A.I., Tezekbayeva, M.S., Yeremin, A.V., and Zamyatin, N.I.

Abstract

An experimental study of $^{256}$Rf spontaneous fission following the fusion reaction of $^{50}$Ti+$^{208}$Pb was performed using the velocity filter SHELS of the Flerov laboratory at JINR. The average number of neutrons of ν‾=4.30±0.17 and variance of σν2=3.2 from the prompt neutron multiplicity distribution were obtained. The alpha decay branching ratio of bα=0.003−0.003+0.005 and the half-life of T1/2=(6.7±0.2) ms of the isotope were determined. For the first time, our neutron detector system allowed us to extend investigation of the prompt neutron multiplicity study to the superheavy element region.

Published
2023

8. Evidence of high-$K$ isomerism in $_{102}^{256}\mathrm{No}_{154}$

Author

Kessaci, K., Gall, B.J.P., Dorvaux, O., Lopez-Martens, A., Chakma, R., Hauschild, K., Chelnokov, M.L., Chepigin, V.I., Forge, M., Isaev, A.V., Izosimov, I.N., Katrasev, D.E., Kuznetsova, A.A., Malyshev, O.N., Mukhin, R., Piot, J., Popeko, A.G., Popov, Yu.A., Sokol, E.A., Svirikhin, A.I., Tezekbayev, M.S., Yeremin, A.V., Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; Isomeric states in No256 were investigated using internal conversion electron and γ-ray spectroscopy with the GABRIELA detection system at the focal plane of the SHELS recoil separator, at the Flerov Laboratory for Nuclear Research (FLNR, JINR, Dubna). The nuclei of interest were produced using the highly asymmetric fusion-evaporation reaction U238(Ne22,4n)No256. The emission of internal conversion electrons and γ rays occurring between a No256 implantation and a subsequent α-decay event were studied, resulting in the observation of high-K isomerism in this nobelium isotope. The nature of the isomeric states is discussed in terms of possible two- and four-quasiparticle structures.

Published
2021
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9. Prototype of the Digital Electronics Chain for the GABRIELA Detector Assembly and First Tests

Author

Mukhin, R.S., Yeremin, A.V., Izosimov, I.N., Isaev, A.V., Kuznetsova, A.A., Malyshev, O.N., Popeko, A.G., Popov, Y.A., Sailaubekov, B., Svirikhin, A.I., Sokol, E.A., Tezekbayeva, M.S., Chelnokov, M.L., Chepigin, V.I., Hauschild, K., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Radiation, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, 0103 physical sciences, Radiology, Nuclear Medicine and imaging, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 01 natural sciences, Atomic and Molecular Physics, and Optics, 010305 fluids & plasmas
Abstract

International audience; This paper describes a digital electronics chain prototype for the GABRIELA detector assembly. The goal of the digital algorithm is to reduce the dead time of the electronics to tens of nanoseconds without loss of energy and time resolution. The structure and temporal diagrams of the algorithm are given in the text. The paper also shows the energy resolution of the algorithm in comparison with the existing analog system and the results of the first in beam run.

Published
2021
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11. Radioactive decay of 217Pa

Author

Heßberger, F.P., Hofmann, S., Kojouharov, I., Ackermann, D., Antalic, S., Cagarda, P., Kindler, B., Lommel, B., Mann, R., Popeko, A.G., Saro, S., Uusitalo, J., and Yeremin, A.V.

Published
2002
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12. New results on elements 111 and 112

Author

Hofmann, S., Heßberger, F.P., Ackermann, D., Münzenberg, G., Antalic, S., Cagarda, P., Kindler, B., Kojouharova, J., Leino, M., Lommel, B., Mann, R., Popeko, A.G., Reshitko, S., Śaro, S., Uusitalo, J., and Yeremin, A.V.

Published
2002
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15. Digital Signal Processing for the GABRIELA Detector Assembly

Author

Mukhin, R.S., primary, Yeremin, A.V., additional, Izosimov, I.N., additional, Isaev, A.V., additional, Kuznetsova, A.A., additional, Malyshev, O.N., additional, Popeko, A.G., additional, Popov, Yu.A., additional, Sailaubekov, B., additional, Svirikhin, A.I., additional, Sokol, E.A., additional, Tezekbayeva, M.S., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, and Hauschild, K., additional

Published
2021
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16. Study of Spontaneous Fission Using the SFiNx System

Author

Isaev, A.V., primary, Yeremin, A.V., additional, Zamyatin, N.I., additional, Izosimov, I.N., additional, Kuznetsova, A.A., additional, Malyshev, O.N., additional, Mukhin, R.S., additional, Popeko, A.G., additional, Popov, Yu.A., additional, Sailaubekov, B., additional, Svirikhin, A.I., additional, Sokol, E.A., additional, Tezekbayeva, M.S., additional, Testov, D.A., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Antalic, S., additional, Mosat, P., additional, Brionnet, P., additional, Gall, B., additional, Dorvaux, O., additional, Kessaci, K., additional, Sellam, A., additional, Lopez-Martens, A., additional, and Hauschild, K., additional

Published
2021
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17. Search for new isotopes of element 112 by irradiation of 238U with 48Ca

Author

Oganessian, Yu.Ts., Yeremin, A.V., Gulbekian, G.G., Bogomolov, S.L., Chepigin, V.I., Gikal, B.N., Gorshkov, V.A., Itkis, M.G., Kabachenko, A.P., Kutner, V.B., Lavrentev, A.Yu., Malyshev, O.N., Popeko, A.G., Roháč, J., Sagaidak, R.N., Hofmann, S., Münzenberg, G., Veselsky, M., Saro, S., Iwasa, N., and Morita, K.

Published
1999
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18. Synthesis of nuclei of the superheavy element 114 in reactions induced by (super48)Ca

Author

Oganessian, Yu. Ts., Yremin, A.V., Popeko, A.G., Bogomolov, S.L., Buklanov, G.V., Chelnokov, M.L., Chepigin, V.I., Gikal, B.N., Gorshkov,V.A., Gulbekian, G.G., Itkis, M.G., Kabachenko, A.P., Lavrentev,A. Yu., Malyshev, O.N., Rohac, J., Sagaidak, R.N., Hofmann, S., Saro,S., Giardina, G., and Morita, K.

Subjects
Nuclides -- Research, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

It has been shown that neutron-rich nuclei with N > 168 can be synthesized in fusion reactions using heavy isotopes of uranium, plutonium and curium and a (super48)Ca ion beam. The synthesis of an isotope having 114 protons and 173 neutrons has been undertaken, via fusion of intense beams of (super48)Ca ions with (super242)Pu targets. The new isotope (super287)114 has a half life several times shorter than the heavier isotope (super289)114.

Published
1999

19. Study of heavy-ion induced fission for heavy-element synthesis

Author

Nishio K., Ikezoe H., Hofmann S., Heßberger F.P., Ackermann D., Antalic S., Aritomo Y., Comas V.F., Düllman Ch.E., Gorshkov A., Graeger R., Heinz S., Heredia J.A., Hirose K., Khuyagbaatar J., Kindler B., Kojouharov I., Lommel B., Makii H., Mann R., Mitsuoka S., Nagame Y., Nishinaka I., Ohtsuki T., Popeko A.G., Saro S., Schädel M., Türler A., Wakabayashi Y., Watanabe Y., Yakushev A., and Yeremin A.V.

Subjects
Physics, QC1-999
Abstract

Fission fragment mass distributions were measured in heavy-ion induced fissions using 238U target nucleus. The measured mass distributions changed drastically with incident energy. The results are explained by a change of the ratio between fusion and qasifission with nuclear orientation. A calculation based on a fluctuation dissipation model reproduced the mass distributions and their incident energy dependence. Fusion probability was determined in the analysis, and the values were consistent with those determined from the evaporation residue cross sections.

Published
2014
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22. Detailed study of Rf and No isotopes radioactive decay properties

Author

Tezekbayeva, M.S., primary, Yeremin, A.V., additional, Malyshev, O.N., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Isaev, A.V., additional, Karpov, A.V., additional, Kuznetsova, A.A., additional, Popeko, A.G., additional, Popov, Yu.A., additional, Svirikhin, A.I., additional, Sokol, E.A., additional, Lopez-Martens, A., additional, Hauschild, K., additional, Dorvaux, O., additional, Gall, B., additional, Mosat, P., additional, and Sailaubekov, B.S., additional

Published
2019
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23. Measurement of proton-evaporation rates in fusion reactions leading to transfermium nuclei

Author

Lopez-Martens, A., primary, Yeremin, A.V., additional, Tezekbayeva, M.S., additional, Asfari, Z., additional, Brionnet, P., additional, Dorvaux, O., additional, Gall, B., additional, Hauschild, K., additional, Ackermann, D., additional, Caceres, L., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Gustova, M.V., additional, Isaev, A.V., additional, Karpov, A.V., additional, Kuznetsova, A.A., additional, Piot, J., additional, Malyshev, O.N., additional, Popeko, A.G., additional, Popov, Yu.A., additional, Rezynkina, K., additional, Savajols, H., additional, Svirikhin, A.I., additional, Sokol, E.A., additional, and Steinegger, P., additional

Published
2019
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24. Investigation of the spontaneous fission properties of neutron-deficient nobelium isotopes

Author

Isaev, A.V., primary, Svirikhin, A.I., additional, Andreev, A.V., additional, Yeremin, A.V., additional, Izosimov, I.N., additional, Kuznetsov, A.N., additional, Kuznetsova, A.A., additional, Malyshev, O.N., additional, Popeko, A.G., additional, Popov, Yu.A., additional, Sokol, E.A., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Schneidman, T.M., additional, Gall, B., additional, Dorvaux, O., additional, Brione, P., additional, Sellam, A., additional, Hauschild, K., additional, Lopez-Martenz, A., additional, Rezynkina, K., additional, Mullins, S., additional, and Mosat, P., additional

Published
2019
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25. Investigation of fission properties and evaporation residue measurement in the reactions using 238U target nucleus

Author

Saro S., Popeko A.G., Ohtsuki T., Nishinaka I., Nagame Y., Mitsuoka S., Mann R., Makii H., Lommel B., Kojouharov I., Kindler B., Hirose K., Khuyagbaatar J., Heredia J.A., Heinz S., Hagino K., Graeger R., Gorshkov A., Comas V.F., Düllmann Ch.E., Aritomo Y., Antalic S., Hofmann S., Ackermann D., Ikezoe H., Nishio K., Schädel M., Türler A., Wakabayashi Y., Watanabe Y., Yakushev A., and Yeremin A.V.

Subjects
Physics, QC1-999
Abstract

Fragment mass distributions for fission after full momentum transfer were measured in the reactions of 30Si,34,36 S,31P,40Ar + 238U at bombarding energies around the Coulomb barrier. Mass distributions change significantly as a function of incident beam energy. The asymmetric fission probability increases at sub-barrier energy. The phenomenon is interpreted as an enhanced quasifission probability owing to orientation effects on fusion and/or quasifission. The evaporation residue (ER) cross sections were measured in the reactions of 30Si + 238U and 34S + 238U to obtain information on fusion. In the latter reaction, significant suppression of fusion was implied. This suggests that fission events different from compound nucleus are included in the masssymmetric fragments. The results are supported by a model calculation based on a dynamical calculation using Langevin equation, in which the mass distribution for fusion-fission and quasifission fragments are separately determined.

Published
2011
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26. Observation of new neutron-deficient isotopes with Z≥92 in multinucleon transfer reactions

Author

Devaraja, H.M., Heinz, S., Beliuskina, O., Comas, V., Hofmann, S., Hornung, C., Münzenberg, G., Nishio, K., Ackermann, D., Gambhir, Y.K., Gupta, M., Henderson, R.A., Heßberger, F.P., Khuyagbaatar, J., Kindler, B., Lommel, B., Moody, K.J., Maurer, J., Mann, R., Popeko, A.G., Shaughnessy, D.A., Stoyer, M.A., and Yeremin, A.V.

Subjects
Nuclear and High Energy Physics
Published
2015
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27. Influence of octupole vibration on the low-lying structure of $^{251}$Fm and other heavy $N=151$ isotones

Author

Rezynkina, K., Lopez-Martens, A., Hauschild, K., Deloncle, I., Péru, S., Brionnet, P., Chelnokov, M.L., Chepigin, V.I., Dorvaux, O., Déchery, F., Faure, H., Gall, B., Isaev, A.V., Izosimov, I.N., Katrasev, D.E., Kuznetsov, A.N., Kuznetsova, A.A., Malyshev, O.N., Popeko, A.G., Popov, Y.A., Sokol, E.A., Svirikhin, A.I., Yeremin, A.V., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]
Abstract

International audience; The structure of low-lying excited states in Fm251, populated by the α decay of No255, has been investigated by means of combined γ and internal conversion electron spectroscopy. The values for the internal conversion coefficients for the 1/2+→5/2+ and 5/2+→9/2− transitions have been measured. The determined M2/E3 mixing ratio and lifetime for the 5/2+ decay to the ground state allowed to determine the corresponding reduced transitions strengths of B(E3)=18(6) W.u. and B(M2)=3.0(6)×10−3 W.u. These results, as well as the results of previous studies in N=151 isotopes, are compared to theoretical calculations beyond the mean-field approach, including the first QRPA calculations using the Gogny D1M parametrization for such heavy odd-N nuclei. The comparison points to the importance of accounting for the octupole vibrations for a proper understanding of the low-lying nuclear structure of some of the heaviest elements.

Published
2018
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30. Study of Heavy-ion Induced Fission for Heavy Element Synthesis

Author

Nishio, K., Ikezoe, H., Hofmann, S., Ackermann, D., Aritomo, Y., Comas, V.F., Düllmann, Ch.E., Heinz, S., Heredia, J.A., Heßberger, F.P., Hirose, K., Khuyagbaatar, J., Kindler, B., Kojouharov, I., Lommel, B., Makii, M., Mann, R., Mitsuoka, S., Nishinaka, I., Ohtsuki, T., Saro, S., Schädel, M., Popeko, A.G., Türler, A., Wakabayashi, Y., Watanabe, Y., Yakushev, A., and Yeremin, A.

Published
2014
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31. Spectroscopy of No-253 and its daughters

Author

Lopez-Martens, A., Wiborg-Hagen, T., Hauschild, K., Chelnokov, M.L, Chepigin, Vi, Curien, D., Dorvaux, O., Drafta, G., Gall, B., Gorgen, A., Guttormsen, M., Kabachenko, A.P, Katrasev, D.E, Kutsarova, T., Kuznetsov, A.N, Larsen, A.C, Malyshev, O.N, Minkova, A., Mullins, S., Nyhus, H.T, Pantelica, D., Piot, J., Popeko, A.G, Saro, S., Scintee, N., Siem, S., Syed, N.U.H, Sokol, E.A, Svirikhin, A.I, Yeremin, A.V, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
2n), (Ca-48, multipolarities, I-gamma, pi, Q(alpha). No-253, measured E-alpha, alpha gamma, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], NUCLEAR REACTIONS Pb-207(Ca-48, deduced levels, 3n) E=220 MeV, T-1/2, E-gamma, E(ce), I(ce), (FM)-F-249, alpha(ce)-coin, I-alpha, deduced ICCs
Abstract

New high-statistics data have been obtained on the decay properties of No-253 and its daughters using the reaction Pb-207(Ca-48, 2n)No-253. This was made possible thanks to an improved transmission of fusion evaporation residues through the VASSILISSA recoil separator and an increased efficiency of the GABRIELA detector setup. The decay schemes of No-253 and Fm-249 have been revisited. The known level scheme of Fm-249 has been confirmed, including a new level at 669 keV excitation energy. The observation of L X-rays in coincidence with the a decay of Fm-249 gives additional support to the ground-state configuration of 1/2(+)[631] instead of 5/2(+)[622] for Cf-245. In both Fm-249 and Cf-245, the interpretation of the data has been checked by comparing experimental a-particle and gamma-ray spectra with realistic simulations of the decay cascades and of the interaction of particles and photons in the detectors of GABRIELA. The population of a 0.7 ms isomeric state attributed to No-253 is confirmed by an a-tagged calorimetric measurement and the corresponding gamma and electron decay spectra are presented. Possible evidence for more than one isomer is given and a tentative partial decay scheme is discussed in the light of the available experimental data, systematics and theoretical expectations. (C) 2011 Elsevier B.V. All rights reserved.

Published
2011
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32. Spectroscopy of Transfermium Nuclei Using the GABRIELA Setup

Author

Hagen, T.W., Lopez-Martens, A., Hauschild, K., Belozerov, A.V., Chelnokov, M.L., Chepigin, V.I., Curien, D., Dorvaux, O., Drafta, G., Gall, B., Görgen, A., Guttormsen, M., Isaev, A.V., Izosimov, I.N., Kabachenko, A.P., Katrasev, D.E., Kutsarova, T., Kuznetsov, A.N., Larsen, A.C., Malyshev, O.N., Minkova, A., Mullins, S., Nyhus, H.T., Pantelica, D., Piot, J., Popeko, A.G., Saro, S., Scintee, N., Siem, S., Sokol, E.A., Svirikhin, A.I., Yeremin, A.V., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
ELEMENTS, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, DECAY
Abstract

International audience; Heavy elements above Fm (Z = 100) are nuclei with vanishing liquid-drop fission barriers and are therefore entirely stabilized by quantum shell effects. Due to the large density of single-particle levels and strong polarized Coulomb fields, theoretical predictions of magic numbers are extremely model dependent. Furthermore, shell closures for one nucleon species depend strongly on the number of the other species. Reliable experimental data is needed in order to test and constrain theory. As there is a lack of such data in the region, new data is needed along with the confirmation of previous data. A detection system dedicated to the spectroscopy of transfermium nuclei was constructed in 2004 and installed at the focal plane of the VASSILISSA separator at the FLNR, Dubna, by a Franco-Russian collaboration. The results from the 2009 campaign will be presented.

Published
2010
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33. Observation of new neutron-deficient isotopes withZ≥92in multinucleon transfer reactions

Author

Devaraja, H.M., primary, Heinz, S., additional, Beliuskina, O., additional, Comas, V., additional, Hofmann, S., additional, Hornung, C., additional, Münzenberg, G., additional, Nishio, K., additional, Ackermann, D., additional, Gambhir, Y.K., additional, Gupta, M., additional, Henderson, R.A., additional, Heßberger, F.P., additional, Khuyagbaatar, J., additional, Kindler, B., additional, Lommel, B., additional, Moody, K.J., additional, Maurer, J., additional, Mann, R., additional, Popeko, A.G., additional, Shaughnessy, D.A., additional, Stoyer, M.A., additional, and Yeremin, A.V., additional

Published
2015
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34. Half-life and excitation energy of the $I^{\pi}$=13/2^+ isomer in $^{209}$Ra

Author

Hauschild, K., Lopez-Martens, A., Yeremin, A.V., Dorvaux, O., Belozerov, A.V., Chelnokov, M.L., Chepigin, V.I., Gall, B., Gorshkov, V.A., Guttormsen, M., Jones, P., Kabachenko, A.P., Khouaja, A., Larsen, A.C., Malyshev, O.N., Minkova, A., Nyhus, H.T., Oganessian, Yu.Ts., Pantelica, D., Popeko, A.G., Rotaru, F., Saro, S., Shutov, A.V., Siem, S., Svirikhin, A.I., Syed, N.U.H., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
nuclear isomerism, nuclear cascades, alpha-decay, gamma-ray spectra, nuclei with mass number 190 to 219, radioactive decay periods, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ground states, 27.80.+w, 23.35.+g, 23.20.Lv, 23.20.Nx
Abstract

An isomeric state in $^{209}$Ra has been observed for the first time, using the GABRIELA setup at the focal plane of VASSILISSA, to decay to the ground state of $^{209}$Ra via a cascade of 238-keV (M2) and 644-keV transitions. The half-life of the isomer has been measured to be 117(5) $\mu$s and from systematics is assigned as a neutron i ^{-1}_{13/2} excitation.

Published
2008
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35. Detailed spectroscopy in $^{249}$Fm

Author

Lopez-Martens, A., Hauschild, K., Yeremin, A.V., Belozerov, A.V., Briançon, C., Chepigin, V.I., Curien, D., Dorvaux, O., Gall, B., Gorshkov, V.A., Guttormsen, M., Hanappe, F., Kabachenko, A.P., Khalfallah, F., Korichi, A., Larsen, A.C., N. Malyshev, O., Minkova, A., Ts. Oganessian, Yu., Popeko, A.G., Rousseau, Marc, Rowley, N., Sagaidak, R.N., Sharo, S., Shutov, A.V., Siem, S., Svirikhin, A.I., Syed, N.U.H., Theisen, C., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
PACS: 23.20.Lv, 23.20.Nx, 23.60.+e, 27.90.+b, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

Excited states in 249Fm were populated via the alpha decay of 253No and the subsequent decay was observed with the GABRIELA detection system installed at the focal plane of the VASSILISSA recoil separator. The energies, spins, and parities of these states could be established through combined alpha, gamma, and conversion-electron spectroscopy. The first members of the ground-state rotational band were identified. Their excitation energies as well as the observation of a cross-over E2 transition confirm the assignment of 7/2+[624] for the ground state of 249Fm. Two excited states were also observed and their decay properties suggest that they correspond to the particle excitation 9/2-[734] and hole excitation 5/2+[622]. The analysis suggests that the 279-keV transition de-exciting the 9/2- state has anomalous E1 conversion coefficients.

Published
2006
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36. First Experimental Tests of SHELS: a New Heavy Ion Separator at the JINR

Author

Rezynkina, K., primary, Hauschild, K., additional, Lopez-Martens, A., additional, Dorvaux, O., additional, Gall, B., additional, Déchery, F., additional, Faure, H., additional, Yeremin, A.V., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Isaev, A.V., additional, Izosimov, I.N., additional, Katrasev, D.E., additional, Kuznetsov, A.N., additional, Kuznetsova, A.A., additional, Malyshev, O.N., additional, Popeko, A.G., additional, Popov, Y.A., additional, Sokol, E.A., additional, Svirikhin, A.I., additional, Piot, J., additional, and Rubert, J., additional

Published
2015
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37. Experiments on the synthesis of superheavy elements with Z = 110,112 via $^{232}$Th, $^{238}$U+$^{48}$Ca reactions

Author

Oganessian, Y.T., Yeremin, A.V., Chepigin, V.I., Itkis, M.G., Kabachenko, A.P., Konstantinesky, O., Konstantinesky, M., Malyshev, O.N., Popeko, A.G., Rohac, J., Sagaidak, R.N., Shirokovsky, I.V., Utyonkov, V.K., Hofmann, S., Munzenberg, G., Veselsky, M., Saro, S., Iwasa, N., Morita, K., Yoneda, A., Hussonnois, M., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Robert, Suzanne

Subjects
[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], [PHYS.PHYS.PHYS-CHEM-PH] Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]
Published
1999

38. Spectroscopy of 253No and its daughters

Author

Lopez-Martens, A., primary, Wiborg-Hagen, T., additional, Hauschild, K., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Curien, D., additional, Dorvaux, O., additional, Drafta, G., additional, Gall, B., additional, Görgen, A., additional, Guttormsen, M., additional, Isaev, A.V., additional, Izosimov, I.N., additional, Kabachenko, A.P., additional, Katrasev, D.E., additional, Kutsarova, T., additional, Kuznetsov, A.N., additional, Larsen, A.C., additional, Malyshev, O.N., additional, Minkova, A., additional, Mullins, S., additional, Nyhus, H.T., additional, Pantelica, D., additional, Piot, J., additional, Popeko, A.G., additional, Saro, S., additional, Scintee, N., additional, Siem, S., additional, Syed, N.U.H., additional, Sokol, E.A., additional, Svirikhin, A.I., additional, and Yeremin, A.V., additional

Published
2011
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39. Investigation of fission properties and evaporation residue measurement in the reactions using238U target nucleus

Author

Nishio, K., primary, Ikezoe, H., additional, Hofmann, S., additional, Ackermann, D., additional, Antalic, S., additional, Aritomo, Y., additional, Comas, V.F., additional, Düllmann, Ch.E., additional, Gorshkov, A., additional, Graeger, R., additional, Hagino, K., additional, Heinz, S., additional, Heredia, J.A., additional, Hirose, K., additional, Khuyagbaatar, J., additional, Kindler, B., additional, Kojouharov, I., additional, Lommel, B., additional, Makii, H., additional, Mann, R., additional, Mitsuoka, S., additional, Nagame, Y., additional, Nishinaka, I., additional, Ohtsuki, T., additional, Popeko, A.G., additional, Saro, S., additional, Schädel, M., additional, Türler, A., additional, Wakabayashi, Y., additional, Watanabe, Y., additional, Yakushev, A., additional, and Yeremin, A.V., additional

Published
2011
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40. GABRIELA: A new detector array for -ray and conversion electron spectroscopy of transfermium elements

Author

Hauschild, K., primary, Yeremin, A.V., additional, Dorvaux, O., additional, Lopez-Martens, A., additional, Belozerov, A.V., additional, Briançon, Ch., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Garcia-Santamaria, S.A., additional, Gorshkov, V.A., additional, Hanappe, F., additional, Kabachenko, A.P., additional, Korichi, A., additional, Malyshev, O.N., additional, Oganessian, Yu.Ts., additional, Popeko, A.G., additional, Rowley, N., additional, Shutov, A.V., additional, Stuttgé, L., additional, and Svirikhin, A.I., additional

Published
2006
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41. GAMMA SPECTROSCOPY OF TRANSFERMIUM ELEMENTS AT THE VASSILISSA SET UP

Author

YEREMIN, A.V., primary, BELOZEROV, A.V., additional, CHELNOKOV, M.L., additional, CHEPIGIN, V.I., additional, GORSHKOV, V.A., additional, KABACHENKO, A.P., additional, MALYSHEV, O.N., additional, OGANESSIAN, YU.TS., additional, POPEKO, A.G., additional, SAGAIDAK, R.N., additional, SHUTOV, A.V., additional, SVIRIKHIN, A.I., additional, BRIANCON, CH., additional, HAUSCHILD, K., additional, KORICHI, A., additional, LOPEZ-MARTENS, A., additional, and DORVAUX, O., additional

Published
2005
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42. NEUTRON DETECTOR AT THE FOCAL PLANE OF THE SET UP VASSILISSA.

Author

SVIRIKHIN, A.I., primary, BELOZEROV, A.V., additional, CHELNOKOV, M.L., additional, CHEPIGIN, V.I., additional, GORSHKOV, V.A., additional, KABACHENKO, A.P., additional, MALYSHEV, O.N., additional, POPEKO, A.G., additional, SAGAIDAK, R.N., additional, SHUTOV, A.V., additional, SOKOL, E.A., additional, and YEREMIN, A.V., additional

Published
2005
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43. Neutron detector at the focal plane of the set up VASSILISSA

Author

Yeremin, A.V., primary, Belozerov, A.V., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Gorshkov, V.A., additional, Kabachenko, A.P., additional, Malyshev, O.N., additional, Popeko, A.G., additional, Sagaidak, R.N., additional, Shutov, A.V., additional, Sokol, E.A., additional, and Svirikhin, A.I., additional

Published
2005
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44. Properties of heavy nuclei measured at the GSI SHIP

Author

Hofmann, S., primary, Heßberger, F.P., additional, Ackermann, D., additional, Antalic, S., additional, Cagarda, P., additional, Kindler, B., additional, Kuusiniemi, P., additional, Leino, M., additional, Lommel, B., additional, Malyshev, O.N., additional, Mann, R., additional, Mu¨nzenberg, G., additional, Popeko, A.G., additional, S´aro, S., additional, Streicher, B., additional, and Yeremin, A.V., additional

Published
2004
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45. In-flight separation and mass selection of heavy evaporation residues

Author

Oganessian, Yu.Ts., primary, Yeremin, A.V., additional, Popeko, A.G., additional, Malyshev, O.N., additional, Belozerov, A.V., additional, Buklanov, G.V., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Gorshkov, V.A., additional, Hofmann, S., additional, Itkis, M.G., additional, Kabachenko, A.P., additional, Kindler, B., additional, Mu¨nzenberg, G., additional, Sagaidak, R.N., additional, Sˇa´ro, Sˇ., additional, Scho¨tt, H.-J., additional, Sˇtreicher, B., additional, Shutov, A.V., additional, Svirikhin, A.I., additional, and Vostokin, G.K., additional

Published
2004
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46. Chemical identification and properties of element 112

Author

Yakushev, A.B., primary, Zvara, I., additional, Oganessian, Yu.Ts., additional, Belozerov, A.V., additional, Dmitriev, S.N., additional, Eichler, B., additional, Hu¨bener, S., additional, Sokol, E.A., additional, Tu¨rler, A., additional, Yeremin, A.V., additional, Buklanov, G.V., additional, Chelnokov, M.L., additional, Chepigin, V.I., additional, Gorshkov, V.A., additional, Gulyaev, A.V., additional, Lebedev, V.Ya., additional, Malyshev, O.N., additional, Popeko, A.G., additional, Soverna, S., additional, Szeglowski, Z., additional, Timokhin, S.N., additional, Tretyakova, S.P., additional, Vasko, V.M., additional, and Itkis, M.G., additional

Published
2004
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49. Statistical model and cross sections for the evaporation residues formed in the reaction at the 22Ne projectile bombarding energy of 6.0–10.0 MeV/nucleon

Author

Andreyev, A.N, primary, Bogdanov, D.D, additional, Chepigin, V.I, additional, Kabachenko, A.P, additional, Malyshev, O.N, additional, Oganessian, Yu.Ts, additional, Popeko, A.G, additional, Rohác, J, additional, Sagaidak, R.N, additional, Ter-Akopian, G.M, additional, Yeremin, A.V, additional, Šáro, Š, additional, and Veselský, M, additional

Published
1997
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50. Decay widths of highly excited Ra compound nuclei

Author

Andreyev, A.N., primary, Bogdanov, D.D., additional, Chepigin, V.I., additional, Kabachenko, A.P., additional, Malyshev, O.N., additional, Muzichka, Yu.A., additional, Oganessian, Yu.Ts., additional, Popeko, A.G., additional, Pustylnik, B.I., additional, Sagaidak, R.N., additional, Ter-Akopian, G.M., additional, and Yeremin, A.V., additional

Published
1997
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