NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = A.Ionescu Found 12 matches. 2022MI15 Phys.Rev. C 106, 024332 (2022) R.E.Mihai, A.S.Mare, N.Marginean, A.Petrovici, O.Andrei, M.Boromiza, D.Bucurescu, G.Cata-Danil, C.Clisu, C.Costache, I.Dinescu, D.Filipescu, N.Florea, I.Gheorghe, A.Ionescu, R.Lica, R.Marginean, C.Mihai, A.Mitu, A.Negret, C.R.Nita, A.Olacel, A.Oprea, S.Pascu, A.Serban, C.Sotty, L.Stan, R.Suvaila, S.Toma, A.Turturica, S.Ujeniuc, C.A.Ur Search for isospin-symmetry breaking in the A=62 isovector triplet NUCLEAR REACTIONS 58Ni(6Li, 2n)62Ga, E=22 MeV; measured Eγ, Iγ, nγ-coin, (2n)γ-coin, γ(θ) using ROSPHERE array with ten Compton-suppressed HPGe detectors and 11 LaBr3(Ce) detectors for γ rays, and two liquid scintillator neutron detector walls with 12 detectors each neutrons at the IFIN-HH 9-MV Tandem accelerator. 62Ga; deduced levels, J, π, first 2+ state, multipolarities. Comparison with beyond-mean-field complex excited Vampir variational model. Discussed Coulomb energy differences (CED), mirror energy differences (MED), triplet energy differences (TED) for A=62 triplet. 59Ni, 62Cu, 62Zn; observed γ rays. NUCLEAR STRUCTURE 62Ge, 62Ga, 62Zn; calculated energies of low-lying 0+, 2+ and 4+ analog states, B(E2) for 62Zn, superallowed Fermi β decay strength distribution from 62Ga decay to 62Ge g.s., and compared with available experimental values.
doi: 10.1103/PhysRevC.106.024332
2022OL05 Phys.Rev. C 106, 024609 (2022) A.Olacel, C.Borcea, M.Boromiza, S.Calinescu, C.Clisu, C.Costache, Ph.Dessagne, I.Dinescu, D.Filipescu, N.Florea, I.Harca, G.Henning, A.Ionescu, M.Kerveno, R.Lica, A.Matei, C.Mihai, R.Mihai, A.Mitu, A.Negret, C.Nita, M.Nyman, A.Oprea, C.Petrone, A.J.M.Plompen, C.Sotty, L.Stan, L.Stoica, G.Suliman, A.Turturica, S.Ujeniuc Nucleon-induced inelastic cross sections on natNi NUCLEAR REACTIONS 58,60,64Ni(n, n'γ), E=2-17 MeV; 58Ni(p, p'γ), E=4-17 MeV; measured Eγ, Iγ; deduced total σ(E) and exclusive σ(E) for population of particular levels, γ-production σ(E). Comparison to other experimental data and TALYS-1.9 calculations using semimicroscopical (JLM) nucleon OMP. Neutron-beam experiment: Gamma Array for Inelastic Neutron Scattering (GAINS) spectrometer setup at Geel Electron Linear Accelerator (GELINA) neutron source. Proton-beam experiment: two HPGe detectors at 9-MV Tandem facility of the Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH).
doi: 10.1103/PhysRevC.106.024609
2021AY05 Phys.Rev. C 104, 054309 (2021) S.Aydin, M.Ionescu-Bujor, N.Marginean, C.Costache, D.Bucurescu, N.Florea, T.Glodariu, A.Ionescu, A.Iordachescu, R.Marginean, C.Mihai, R.E.Mihai, A.Mitu, A.Negret, C.R.Nita, A.Olacel, S.Pascu, L.Stroe, R.Suvaila, S.Toma, A.Turturica Lifetime measurements and evidence for triaxial nuclear shapes in 127Cs NUCLEAR REACTIONS 121Sb(12C, 2nα)127Cs, E=54 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO ratios), level T1/2 by DSAM and by fast-timing method using an array of LaBr3(Ce) detectors and ROSPHERE array for γ detection at the FN Tandem accelerator of IFIN-HH-Bucharest. 127Cs; deduced high-spin levels, J, π, bands, multipolarities, multipole mixing ratios, B(M1), B(E2), signature splitting S(J), configurations, evidence for triaxial nuclear shapes in the states described by the proton h11/2 orbital, soft core for quadrupole deformation and shape asymmetry due to polarizing h11/2 protons. Comparison with quasiparticle plus triaxial rotor (QTR) model predictions.
doi: 10.1103/PhysRevC.104.054309
2021TU02 Phys.Rev. C 103, 044306 (2021) A.Turturica, C.Costache, P.Petkov, J.-P.Delaroche, M.Girod, J.Libert, G.Cata-Danil, S.Pascu, C.Mihai, M.Boromiza, D.Bucurescu, C.Clisu, D.Filipescu, N.M.Florea, I.Gheorghe, A.Ionescu, R.Lica, N.M.Marginean, R.Marginean, R.E.Mihai, A.Mitu, A.Negret, C.R.Nita, A.Olacel, A.Oprea, T.Sava, C.Sotty, L.Stan, I.Stiru, R.Suvaila, S.Toma, G.V.Turturica, S.Ujeniuc Collective properties of neutron-deficient Nd isotopes: Lifetime measurements of the yrast states in 136Nd NUCLEAR REACTIONS 124Te(16O, 4n), E=80 MeV; measured Eγ, Iγ, γγ-coin, half-lives of levels by recoil distance Doppler shift (RDDS) and Doppler-shift attenuation (DSA) methods and analysis by differential decay curve method (DDCM) using ROSPHERE array at the tandem accelerator facility of IFINHH-Bucharest-Magurele. 136Nd; deduced levels, J, π, bands, B(E2). Comparison with five-dimensional collective Hamiltonian (5DCH) calculations with D1S Gogny force. Systematics of energies of ground state and γ bands, and other observables in 130,132,134,136,138,140Nd. NUCLEAR STRUCTURE 130,132,134,136,138,140Nd; calculated potential energy surfaces (PES) in (β, γ) plane, mean β and γ deformations, moments of inertia for yrast bands, B(E2), even-odd staggering parameter, spectroscopic quadrupole moments, charge radii and isotope shifts, ρ2(E0) rates. Five-dimensional collective Hamiltonian (5DCH) calculations with D1S Gogny force. Comparison with experimental data.
doi: 10.1103/PhysRevC.103.044306
2021VO14 Phys.Lett. B 821, 136624 (2021) M.von Tresckow, M.Rudigier, T.M.Shneidman, T.Kroll, M.Boromiza, C.Clisu, C.Costache, d.Filipescu, N.M.Florea, I.Gheorghe, K.Gladnishki, A.Ionescu, D.Kocheva, R.Lica, N.Marginean, R.Marginean, K.R.Mashtakov, C.Mihai, R.E.Mihai, A.Negret, C.R.Nita, A.Olacel, A.Oprea, S.Pascu, G.Rainovski, T.Sava, M.Scheck, P.Spagnoletti, C.Sotty, L.Stan, I.Stiru, S.Toma, A.Turturica, S.Ujeniuc New evidence for alpha clustering structure in the ground state band of 212Po NUCLEAR REACTIONS 208Pb(10B, 6Li)212Po, E=51 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, level T1/2, B(E2). ROSPHERE array, Horia Hulubei National Institute. Delayed coincidence fast-timing method.
doi: 10.1016/j.physletb.2021.136624
2020IO02 Phys.Rev. C 102, 044311 (2020) M.Ionescu-Bujor, S.Aydin, A.Iordachescu, N.Marginean, S.Pascu, D.Bucurescu, C.Costache, N.Florea, T.Glodariu, A.Ionescu, R.Marginean, C.Mihai, R.E.Mihai, A.Mitu, A.Negret, C.R.Nita, A.Olacel, B.SaygI, L.Stroe, R.Suvaila, S.Toma, A.Turturica Band structures, lifetimes, and shape coexistence in 130La NUCLEAR REACTIONS 121Sb(12C, 3n)130La, E=54 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO), isomer and level half-lives by γγ(t) using the ROSPHERE array of 14 HPGe detectors and 11 LaBr3(Ce) scintillators at the FN Tandem accelerator of IFINHH-Bucharest. 130La; deduced high-spin levels, J, π, bands, multipolarities, configurations, B(M1), B(E2), transition quadrupole moments, β2 deformation parameters. Comparison with two-quasiparticle-plus-rotor model calculations, and with geometrical model of Donau and Frauendorf for B(M1) strengths.
doi: 10.1103/PhysRevC.102.044311
2020LE07 Phys.Rev. C 102, 014308 (2020) A.I.Levon, D.Bucurescu, C.Costache, T.Faestermann, R.Hertenberger, A.Ionescu, R.Lica, A.G.Magner, C.Mihai, R.Mihai, C.R.Nita, S.Pascu, K.P.Shevchenko, A.A.Shevchuk, A.Turturica, H.-F.Wirth High-resolution study of excited states in 158Gd with the (p, t) reaction NUCLEAR REACTIONS 160Gd(p, t), E=22 MeV; measured triton spectra, exclusive differential σ(θ), integrated σ using the Q3D spectrograph at the Tandem accelerator of the Maier-Leibnitz-Laboratory in Munich. Enriched target. DWBA analysis of σ(θ) data using coupled-channel approximation CHUCK3 code. 158Gd; deduced levels, J, π. Discussed bands, moment of inertia, B(E1), B(E2). Comparison with theoretical calculations using the spdf version of the interacting boson model (IBM). 154,155,156Gd; identified ground and first excited states from (p, t) reaction on other Gd isotopes.
doi: 10.1103/PhysRevC.102.014308
2020MA37 Phys.Rev.Lett. 125, 102502 (2020) N.Marginean, D.Little, Y.Tsunoda, S.Leoni, R.V.F.Janssens, B.Fornal, T.Otsuka, C.Michelagnoli, L.Stan, F.C.L.Crespi, C.Costache, R.Lica, M.Sferrazza, A.Turturica, A.D.Ayangeakaa, K.Auranen, M.Barani, P.C.Bender, S.Bottoni, M.Boromiza, A.Bracco, S.Calinescu, C.M.Campbell, M.P.Carpenter, P.Chowdhury, M.Ciemala, N.Cieplicka-Orynczak, D.Cline, C.Clisu, H.L.Crawford, I.E.Dinescu, J.Dudouet, D.Filipescu, N.Florea, A.M.Forney, S.Fracassetti, A.Gade, I.Gheorghe, A.B.Hayes, I.Harca, J.Henderson, A.Ionescu, L.W.Iskra, M.Jentschel, F.Kandzia, Y.H.Kim, F.G.Kondev, G.Korschinek, U.Koster, Krishichayan, M.Krzysiek, T.Lauritsen, J.Li, R.Marginean, E.A.Maugeri, C.Mihai, R.E.Mihai, A.Mitu, P.Mutti, A.Negret, C.R.Nita, A.Olacel, A.Oprea, S.Pascu, C.Petrone, C.Porzio, D.Rhodes, D.Seweryniak, D.Schumann, C.Sotty, S.M.Stolze, R.Suvaila, S.Toma, S.Ujeniuc, W.B.Walters, C.Y.Wu, J.Wu, S.Zhu, S.Ziliani Shape Coexistence at Zero Spin in 64Ni Driven by the Monopole Tensor Interaction NUCLEAR REACTIONS 62Ni(18O, 16O), E=39 MeV; 65Cu(11B, 12C), E=26 MeV; 63Ni(n, γ), E thermal; measured reaction products, Eγ, Iγ; analyzed available data from multiple experiments. 64Ni; deduced γ-ray energies, J, π, B(E2). Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.125.102502
2019BU14 Phys.Rev. C 100, 014327 (2019) D.Bucurescu, S.Pascu, T.Faestermann, H-F.Wirth, C.Costache, A.Ionescu, R.Lica, R.Mihai, A.Turturica, R.Hertenberger Excited states of the odd-odd nucleus 158Eu from the (d, α) reaction NUCLEAR REACTIONS 160Gd(d, α)158Eu, E=18.0 MeV; measured Eα, Iα, differential σ(θ) using multiwire proportional chamber of Q3D spectrograph at MLL-Garching tandem accelerator. 111Cd(d, α)109Ag, E=18.0 MeV; measured Eα, Iα, used for calibration of 158Eu spectrum. 158Eu; deduced levels, and compared with previously known levels from 158Sm β- decay. Systematics of low-lying level densities of 150,152,154,156,158Eu.
doi: 10.1103/PhysRevC.100.014327
2019LE13 Phys.Rev. C 100, 034307 (2019) A.I.Levon, D.Bucurescu, C.Costache, T.Faestermann, R.Hertenberger, A.Ionescu, R.Lica, A.G.Magner, C.Mihai, R.Mihai, C.R.Nita, S.Pascu, K.P.Shevchenko, A.A.Shevchuk, A.Turturica, H.-F.Wirth New data on 0+ states in 158Gd NUCLEAR REACTIONS 160Gd(p, t), E=22 MeV; measured E(t), I(t), σ(θ) using enriched target and high-precision Q3D spectrometer at the Munich Tandem accelerator facility. 158Gd; deduced 230 levels between 1700 and 4300 keV, J, π, 36 levels with Jπ=0+ below 3.4 MeV; analyzed σ(θ) by DWBA calculations using optical model parameters from CHUCK3. Comparison with calculations within the spdf-IBM model, and with previous experimental results.
doi: 10.1103/PhysRevC.100.034307
2018IO02 Phys.Rev. C 98, 054305 (2018) M.Ionescu-Bujor, S.Aydin, N.Marginean, C.Costache, D.Bucurescu, N.Florea, T.Glodariu, A.Ionescu, A.Iordachescu, R.Marginean, C.Mihai, R.E.Mihai, A.Mitu, A.Negret, C.R.Nita, A.Olacel, S.Pascu, B.Saygi, L.Stroe, R.Suvaila, S.Toma, A.Turturica Lifetime measurements in the chiral-candidate doublet bands of 130La NUCLEAR REACTIONS 121Sb(12C, 3n), E=54 MeV; measured Eγ, γ(θ), γγ-coin, level half-lives by Doppler-shift attenuation method and the in-beam fast γγ(t) timing technique using the ROSPHERE array for γ detection at the FN Tandem accelerator of IFIN-HH, Bucharest. 130La; deduced levels, J, π, chiral band doublet, B(E1), B(M1), B(E2), energy separation and staggering of yrast and sideband, configuration. Comparison with theoretical predictions from two-quasiparticles-plus triaxial rotor model (TQRM).
doi: 10.1103/PhysRevC.98.054305
2017LE06 Phys.Rev.Lett. 118, 162502 (2017) S.Leoni, B.Fornal, N.Marginean, M.Sferrazza, Y.Tsunoda, T.Otsuka, G.Bocchi, F.C.L.Crespi, A.Bracco, S.Aydin, M.Boromiza, D.Bucurescu, N.Cieplicka-Orynczak, C.Costache, S.Calinescu, N.Florea, D.G.Ghita, T.Glodariu, A.Ionescu, L.W.Iskra, M.Krzysiek, R.Marginean, C.Mihai, R.E.Mihai, A.Mitu, A.Negret, C.R.Nita, A.Olacel, A.Oprea, S.Pascu, P.Petkov, C.Petrone, G.Porzio, A.Serban, C.Sotty, L.Stan, I.Stiru, L.Stroe, R.Suvaila, S.Toma, A.Turturica, S.Ujeniuc, C.A.Ur Multifaceted Quadruplet of Low-Lying Spin-Zero States in 66Ni: Emergence of Shape Isomerism in Light Nuclei NUCLEAR REACTIONS 64Ni(18O, X)66Ni, E=39 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced lifetimes, B(E2), J, π. Plunger technique, comparison with the state-of-the-art Monte Carlo shell model calculations.
doi: 10.1103/PhysRevLett.118.162502
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