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NSR database version of May 21, 2024.

Search: Author = Z.Asfari

Found 8 matches.

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2023CH05      Phys.Rev. C 107, 014326 (2023)

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

Investigation of isomeric states in 255Rf

NUCLEAR REACTIONS 207Pb(50Ti, 2n), E=253 MeV; measured reaction products, evaporation residues (ER), Eγ, Iγ, ce, Eβ, (ER)γ-coin, ceγ-coin, (ER)←ce)-coin; deduced isomer levels population, isomeric ratios. 255Rf; deduced levels, J, π, δ, T1/2 of newly discovered isomeric states, high-spin states, configurations of isomeric states. Evaporation residues separated using the velocity filter SHELS and transported to the focal-plane detection setup - GABRIELA detector array for γ and internal conversion electrons at FLNR (JINR, Dubna).

RADIOACTIVITY 255Rf(α), (SF)[from (50Ti, 2n), E=253 MeV]; measuredEα, Iα, fission fragments; deduced T1/2 of α-decay and fission, branching ratios. 255Rf(β+)(EC); deduced upper limit of β+/EC decay branch. Decay of implanted evaporation residues measured by large-area double-sided silicon strip detector (DSSD).

doi: 10.1103/PhysRevC.107.014326
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2023IS03      Phys.Lett. B 843, 138008 (2023)

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

Structure of the prompt neutron multiplicity distribution in the spontaneous fission of 256Rf

RADIOACTIVITY 256Rf(SF), (α) [from 208Pb(50Ti, X), E=237 MeV];measured fission products, En, In, TOF; deduced neutron multiplicity distribution, alpha decay branching ratio and T1/2. Prompt neutron multiplicity study in the superheavy element region. SHELS separator, U-400 cyclotron, the Flerov laboratory at JINR.

doi: 10.1016/j.physletb.2023.138008
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2022HA04      Eur.Phys.J. A 58, 6 (2022)

K.Hauschild, A.Lopez-Martens, R.Chakma, M.L.Chelnokov, V.I.Chepigin, A.V.Isaev, I.N.Izosimov, D.E.Katrasev, A.A.Kuznetsova, O.N.Malyshev, A.G.Popeko, E.A.Sokol, A.I.Svirikhin, M.S.Tezekbayeva, A.V.Yeremin, Z.Asfari, O.Dorvaux, B.J.P.Gall, K.Kessaci, D.Ackermann, J.Piot, P.Mosat, B.Andel

Alpha-decay spectroscopy of 257Rf

RADIOACTIVITY 257Rf(α), (IT) [from 208Pb(50Ti, n), E=240-245 MeV]; measured decay products, Eα, Iα, Eγ, Iγ; deduced α-particles energies and intensities, T1/2, J, π, decay scheme. Nilsson configurations. The detectorarray GABRIELA at the FLNR, Dubna.

doi: 10.1140/epja/s10050-021-00657-8
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2022LO03      Phys.Rev. C 105, L021306 (2022)

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

Fission properties of 253Rf and the stability of neutron-deficient Rf isotopes

RADIOACTIVITY 253Rf(SF)(α) [from 204Pb(50Ti, n), E=244 MeV];249No(α)[from 253Rf(SF)(α)];245Fm(α)[from 249No(α)]; 251No(SF)(α)[from 204Pb(48Ca, n); measured fission fragments, Eγ, Iγ, Eα, Iα, (implant)α-coin, (implant)γ-coin. 253Rf; deduced levels, J, π, T1/2 for two isomeric fissioning states, branching ratio for α-decay. 251No; deduced T1/2. 252Rf; deduced T1/2 based on extracted hindrance factor and systematics. U400 Cyclotron at the Flerov Laboratory of Nuclear Reactions in Dubna with separator for heavy element spectroscopy (SHELS). GABRIELA detector consisting of DSSD and HPGe detectors.

NUCLEAR REACTIONS 204Pb(50Ti, n), E=244 MeV; measured fission fragments from 253Rf decay, Eα, Iα; deduced σ.

doi: 10.1103/PhysRevC.105.L021306
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2020NO05      Bull.Rus.Acad.Sci.Phys. 84, 495 (2020)

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

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

doi: 10.3103/S1062873820040206
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2020NO09      Phys.Rev. C 102, 044605 (2020)

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

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

NUCLEAR REACTIONS 248Cm(52Cr, X)300120*, E=290, 304-MeV; 248Cm(54Cr, X)302120*, E=296 MeV; 232Th(68Zn, X)300120*, E=335 MeV; measured binary reaction products in coincidence by the double-arm time-of-flight spectrometer CORSET, the first two reactions using 248Cm target at the U-400 cyclotron facility of FLNR-Dubna, and the experiment with 232Th target at the University of Jyvaskyla K-130 cyclotron facility; deduced yield and TKE matrices of binary fragments as functions of mass and energy, capture cross sections as a function of effective fissility parameter, excitation energy of primary fragments as function of fragment mass, contributions of symmetric fragments to the capture cross sections, fusion probability as function of the mean fissility parameter, and production σ for the formation of Z=120 superheavy nucleus (SHN). 238U(64Ni, X)302120*, E=335 MeV; compared results of this experiment, reported in 2010Ko16, at Jyvaskyla with the data in the present experiments. 248Cm(54Cr, X) reaction determined to be the most favorable for the production of Z=120 element.

doi: 10.1103/PhysRevC.102.044605
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2019LO08      Phys.Lett. B 795, 271 (2019)

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

Measurement of proton-evaporation rates in fusion reactions leading to transfermium nuclei

NUCLEAR REACTIONS 209Bi(50Ti, X)256Db/257Db/258Db, E=255, 265, 275 MeV; measured reaction products, Eα, Iα; deduced σ.

doi: 10.1016/j.physletb.2019.06.010
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2012GR12      Phys.Rev.Lett. 109, 012501 (2012)

P.T.Greenlees, J.Rubert, J.Piot, B.J.P.Gall, L.L.Andersson, M.Asai, Z.Asfari, D.M.Cox, F.Dechery, O.Dorvaux, T.Grahn, K.Hauschild, G.Henning, A.Herzan, R.-D.Herzberg, F.P.Hessberger, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, T.-L.Khoo, M.Leino, J.Ljungvall, A.Lopez-Martens, R.Lozeva, P.Nieminen, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Sorri, B.Sulignano, Ch.Theisen, J.Uusitalo, M.Venhart

Shell-Structure and Pairing Interaction in Superheavy Nuclei: Rotational Properties of the Z=104 Nucleus 256Rf

NUCLEAR REACTIONS 208Pb(50Ti, 2n)256Rf, E=242 MeV; measured reaction products, Eγ, Iγ; deduced σ, T1/2, rotational band structure, energies, J, π, moments of inertia. Comparison with available data, systematics.

doi: 10.1103/PhysRevLett.109.012501
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