NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = S.Stegemann Found 13 matches. 2024BA08 Appl.Radiat.Isot. 208, 111289 (2024) S.Bara, E.Jajcisinova, T.E.Cocolios, B.Andel, S.Antalic, A.Camaiani, C.Costache, K.Dockx, G.J.Farooq-Smith, A.Kellerbauer, R.Lica, K.M.Lynch, P.Marini, M.Piersa-Silkowska, S.T.Stegemann, M.Stryjczyk, D.Treasa, P.Van Duppen Half-life determination of 215At and 221Ra with high-purity radioactive ion beams RADIOACTIVITY 215At, 221Ra(α) [from U(p, X), E=1.4 GeV]; measured decay products, Eα, Iα; deduced T1/2, α-decay widths and hindrance factors. Comparison with available data. The CRIS and ASET experiments in the course of three different experimental campaigns at ISOLDE, CERN.
doi: 10.1016/j.apradiso.2024.111289
2024YU02 Phys.Lett. B 849, 138452 (2024) Z.Yue, A.N.Andreyev, A.E.Barzakh, I.N.Borzov, J.G.Cubiss, A.Algora, M.Au, M.Balogh, S.Bara, R.A.Bark, C.Bernerd, M.J.G.Borge, D.Brugnara, K.Chrysalidis, T.E.Cocolios, H.De Witte, Z.Favier, L.M.Fraile, H.O.U.Fynbo, A.Gottardo, R.Grzywacz, R.Heinke, A.Illana, P.M.Jones, D.S.Judson, A.Korgul, U.Koster, M.Labiche, L.Le, R.Lica, M.Madurga, N.Marginean, B.Marsh, C.Mihai, E.Nacher, C.Neacsu, C.Nita, B.Olaizola, J.N.Orce, C.A.A.Page, R.D.Page, J.Pakarinen, P.Papadakis, G.Penyazkov, A.Perea, M.Piersa-Silkowska, Zs.Podolyak, S.D.Prosnyak, E.Reis, S.Rothe, M.Sedlak, L.V.Skripnikov, C.Sotty, S.Stegemann, O.Tengblad, S.V.Tolokonnikov, J.M.Udias, P.Van Duppen, N.Warr, W.Wojtaczka Magnetic moments of thallium isotopes in the vicinity of magic N=126 NUCLEAR MOMENTS 207,209Tl; measured frequencies; deduced magnetic dipole moments. Comparison with the self-consistent theory of finite Fermi systems based on the energy density functional. The in-source laser resonance-ionization spectroscopy technique with the Laser Ion Source and Trap (LIST) at ISOLDE (CERN).
doi: 10.1016/j.physletb.2024.138452
2023AU02 Phys.Rev. C 107, 064604 (2023) M.Au, M.Athanasakis-Kaklamanakis, L.Nies, R.Heinke, K.Chrysalidis, U.Koster, P.Kunz, B.Marsh, M.Mougeot, L.Schweikhard, S.Stegemann, Y.Vila Gracia, Ch.E.Dullmann, S.Rothe Production of neptunium and plutonium nuclides from uranium carbide using 1.4-GeV protons NUCLEAR REACTIONS U(p, X)235Np/236Np/237Np/238Np/239Np/240Np/241Np/235Pu/236Pu/237Pu/238Pu/239Pu/240Pu/241Pu, E=1.4 GeV; measured reaction products using resonance ionization laser ion source (RILIS), general purpose separator (GPS), and ISOLTRAP multireflection time-of-flight mass spectrometer (MR-ToF MS) at CERN-ISOLDE facility. 234,237,236,239,240U, 231,232,233,234,235,236,237,238,239,240,241Np, 235,236,237,238,239,240,241Pu; calculated production yields by inelastic reactions and through decays of precursors: 234,236,237Pa, 231,233,235Pu, 237,239,240U, 235Am, 235,236,238,239,240,241Np using GEANT4 QGSP_INCLXX+ABLA code. Comparison with predictions of GEANT4 and FLUKA simulations; discussed limit of accelerator-based isotope production at high-energy proton accelerator facilities for nuclides in the actinide region. ATOMIC PHYSICS 236,237,239Np, 236,239,240Pu; measured isotope shifts for the 395.6-nm ground-state transition in Np isotopes, and for the 413.4-nm ground-state transition in Pu isotopes by two-step ionization schemes using intra-cavity doubled Ti:Sa lasers to resonantly ionize Np and Pu isotopes.
doi: 10.1103/PhysRevC.107.064604
2023CO11 Appl.Radiat.Isot. 202, 111044 (2023) S.M.Collins, U.Koster, A.P.Robinson, P.Ivanov, T.E.Cocolios, B.Russell, A.J.Fenwick, C.Bernerd, S.Stegemann, K.Johnston, A.M.Gerami, K.Chrysalidis, H.Mohamud, N.Ramirez, A.Bhaisare, J.Mewburn-Crook, D.M.Cullen, B.Pietras, S.Pells, K.Dockx, N.Stucki, P.H.Regan Determination of the Terbium-152 half-life from mass-separated samples from CERN-ISOLDE and assessment of the radionuclide purity RADIOACTIVITY 152Tb(EC), (β+); measured decay products, Eγ, Iγ, Eβ, Iβ; deduced T1/2 by three independent techniques from mass-separated samples. Comparison with available data. Two mass-separated samples from the CERN-ISOLDE facility have been assayed at the National Physical Laboratory.
doi: 10.1016/j.apradiso.2023.111044
2022CO10 Appl.Radiat.Isot. 190, 110480 (2022) S.M.Collins, A.P.Robinson, P.Ivanov, U.Koster, T.E.Cocolios, B.Russell, B.Webster, A.J.Fenwick, C.Duchemin, J.P.Ramos, E.Chevallay, U.Jakobsson, S.Stegemann, P.H.Regan, T.Stora Half-life determination of 155Tb from mass-separated samples produced at CERN-MEDICIS RADIOACTIVITY 155Tb(EC) [from Ta(p, X), E=1.4 GeV]; measured decay products, Eγ, Iγ; deduced T1/2. Comparison with available data. The Proton Synchrotron Booster accelerator at CERN, the target foil was delivered to NPL.
doi: 10.1016/j.apradiso.2022.110480
2021DU23 Appl.Radiat.Isot. 178, 109983 (2021) C.Duchemin, T.E.Cocolios, K.Dockx, G.J.Farooq-Smith, O.Felden, R.Formento-Cavaier, R.Gebel, U.Koster, B.Neumaier, B.Scholten, I.Spahn, S.Spellerberg, M.E.Stamati, S.Stegemann, H.Verhoeven Production cross-section measurements of proton-induced reactions on natural tantalum in the 0.3 GeV-1.7 GeV energy range NUCLEAR REACTIONS Ta(p, X)116Te/123I/153Dy/158Er, E=0.3-1.7 GeV; measured reaction products, Eγ, Iγ. 110,111In, 115,118Sb, 116,117,119Te, 123I, 123,127Xe, 127,129Cs, 126,128,131Ba, 132La, 132,133,135,139Ce, 138Pr, 136,139Nd, 145,147Eu, 146,147,149,153Gd, 147,148,149,151,153,155Tb, 152,153,155Dy, 156Ho, 157,158,159,161Er, 163,165,167Tm, 162,169Yb, 167,169Yb, 170,171,172,173Lu, 170,172,173,175,180Hf, 173,174,175,176,177,178,180Ta, 175,177W; deduced cumulative σ and uncertainties. Comparison with available data. COSY synchrotron at Julich.
doi: 10.1016/j.apradiso.2021.109983
2020BE10 Phys.Rev. C 101, 054311 (2020) T.A.Berry, Zs.Podolyak, R.J.Carroll, R.Lica, B.A.Brown, H.Grawe, Ch.Sotty, N.K.Timofeyuk, T.Alexander, A.N.Andreyev, S.Ansari, M.J.G.Borge, M.Brunet, J.R.Cresswell, C.Fahlander, L.M.Fraile, H.O.U.Fynbo, E.Gambna, W.Gelletly, R.-B.Gerst, M.Gorska, A.Gredley, P.Greenlees, L.J.Harkness-Brennan, M.Huyse, S.M.Judge, D.S.Judson, J.Konki, M.Kowalska, J.Kurcewicz, I.Kuti, S.Lalkovski, I.Lazarus, M.Lund, M.Madurga, N.Marginean, R.Marginean, I.Marroquin, C.Mihai, R.E.Mihai, E.Nacher, A.Negret, S.Nae, C.Nita, S.Pascu, R.D.Page, Z.Patel, A.Perea, J.Phrompao, M.Piersa, V.Pucknell, P.Rahkila, E.Rapisarda, P.H.Regan, F.Rotaru, M.Rudigier, C.M.Shand, R.Shearman, E.C.Simpson, S.Stegemann, T.Stora, O.Tengblad, A.Turturica, P.Van Duppen, V.Vedia, P.M.Walker, N.Warr, F.P.Wearing, H.De Witte Octupole states in 207Tl studied through β decay RADIOACTIVITY 207Hg(β-)[from 208Pb(p, X)207Hg, E=1.4 GeV]; measured Eγ, Iγ, βγ- and βγγ-coin, γγ(θ) using plastic scintillators for β-detection and four HPGe detectors for γ-detection at CERN-ISOLDE. 207Tl; deduced levels J, π, β feedings, multipolarities, logft, B(M1), B(E1), B(E2), B(M2), B(E3), configurations. Discussion of octupole phonon states. Comparison with state-of-the-art large-scale shell-model calculations, and with previous experimental results.
doi: 10.1103/PhysRevC.101.054311
2020CA25 Phys.Rev.Lett. 125, 192501 (2020) R.J.Carroll, Z.Podolyak, T.Berry, H.Grawe, T.Alexander, A.N.Andreyev, S.Ansari, M.J.G.Borge, M.Brunet, J.R.Creswell, L.M.Fraile, C.Fahlander, H.O.U.Fynbo, E.R.Gamba, W.Gelletly, R.-B.Gerst, M.Gorska, A.Gredley, P.T.Greenlees, L.J.Harkness-Brennan, M.Huyse, S.M.Judge, D.S.Judson, J.Konki, J.Kurcewicz, I.Kuti, S.Lalkovski, I.H.Lazarus, R.Lica, M.Lund, M.Madurga, N.Marginean, R.Marginean, I.Marroquin, C.Mihai, R.E.Mihai, E.Nacher, A.Negret, C.Nita, S.Pascu, R.D.Page, Z.Patel, A.Perea, J.Phrompao, M.Piersa, V.Pucknell, P.Rahkila, E.Rapisarda, P.H.Regan, F.Rotaru, M.Rudigier, C.M.Shand, R.Shearman, S.Stegemann, T.Stora, C.Sotty, O.Tengblad, P.Van Duppen, V.Vedia, R.Wadsworth, P.M.Walker, N.Warr, F.Wearing, H.De Witte Competition between Allowed and First-Forbidden β Decay: The Case of 208Hg → 208Tl RADIOACTIVITY 208Hg(β-) [from Pb(p, X), E=1.4 GeV]; measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities, J, π, branching ratios, B(Eλ). Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.125.192501
2020VE01 Nucl.Instrum.Methods Phys.Res. B463, 327 (2020) H.Verhoeven, T.E.Cocolios, K.Dockx, G.J.Farooq-Smith, O.Felden, R.Formento-Cavaier, R.Gebel, U.Koster, B.Neumaier, B.Scholten, I.Spahn, S.Spellerberg, M.E.Stamati, S.Stegemann Measurement of spallation cross sections for the production of terbium radioisotopes for medical applications from tantalum targets NUCLEAR REACTIONS Ta(p, X)149Tb, E=0.3-1.7 GeV; measured reaction products, Eβ, Iβ; deduced cumulative σ. Comparison with available data.
doi: 10.1016/j.nimb.2019.04.071
2019BE37 Phys.Lett. B 793, 271 (2019) T.A.Berry, Zs.Podolyak, R.J.Carroll, R.Lica, H.Grawe, N.K.Timofeyuk, T.Alexander, A.N.Andreyev, S.Ansari, M.J.G.Borge, J.Creswell, C.Fahlander, L.M.Fraile, H.O.U.Fynbo, W.Gelletly, R.-B.Gerst, M.Gorska, A.Gredley, P.Greenlees, L.J.Harkness-Brennan, M.Huyse, S.M.Judge, D.S.Judson, J.Konki, J.Kurcewicz, I.Kuti, S.Lalkovski, I.Lazarus, M.Lund, M.Madurga, N.Marginean, R.Marginean, I.Marroquin, C.Mihai, R.E.Mihai, E.Nacher, S.Nae, A.Negret, C.Nita, R.D.Page, S.Pascu, Z.Patel, A.Perea, V.Pucknell, P.Rahkila, E.Rapisarda, P.H.Regan, F.Rotaru, C.M.Shand, E.C.Simpson, Ch.Sotty, S.Stegemann, T.Stora, O.Tengblad, A.Turturica, P.Van Duppen, V.Vedia, R.Wadsworth, P.M.Walker, N.Warr, F.Wearing, H.De Witte Investigation of the Λ n=0 selection rule in Gamow-Teller transitions: The β-decay of 207Hg RADIOACTIVITY 207Hg(β-) [from Pb(p, X)207Hg, E=1.4 GeV]; measured decay products, Eβ, Iβ, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies and intensities, B(Eλ), branching ratios, partial level scheme, J, π, log ft limit, spectroscopic factors.
doi: 10.1016/j.physletb.2019.04.039
2019WI02 Phys.Rev. C 99, 024316 (2019) J.Wiederhold, V.Werner, R.Kern, N.Pietralla, D.Bucurescu, R.Carroll, N.Cooper, T.Daniel, D.Filipescu, N.Florea, R-B.Gerst, D.Ghita, L.Gurgi, J.Jolie, R.S.Ilieva, R.Lica, N.Marginean, R.Marginean, C.Mihai, I.O.Mitu, F.Naqvi, C.Nita, M.Rudigier, S.Stegemann, S.Pascu, P.H.Regan Evolution of E2 strength in the rare-earth isotopes 174, 176, 178, 180Hf NUCLEAR REACTIONS 180Hf(16O, 16O), E=55 MeV; measured Eγ, Iγ, γγ-coin, half-lives of first 2+, 4+ and 6+ states by fast-timing γγ-coin using the ROSPHERE detector array for γ detection at the Bucharest FN Tandem accelerator. 180Hf; deduced levels, B(E2) values and B(E2) ratios. Comparison with literature values. RADIOACTIVITY 174,176,178Ta(EC), (β+)[from 171Yb(6Li, 3n), 172,173Yb(7Li, 3n), E=30 MeV]; measured Eγ, Iγ, γγ-coin, half-lives of first 2+, 4+, 6+ states, and first 2- and 3- states in 176Hf by fast-timing γγ-coin using the ROSPHERE detector array for γ detection at the Bucharest FN Tandem accelerator. 174,176,178Hf; deduced levels, B(E2) for 174,176,178Hf, and B(E1), B(M2), B(E3) for 176Hf. Systematics of g factors and B(E2) of first excited 2+ states, β4 deformation parameters in 156,158,160,162,164,166,168,170Er, 158,160,162,164,166,168,170,172,174,176Yb, 162,164,166,168,170,172,174,176,178,180Hf, 168,170,172,174,180,182,184,186W, 178,180,182,184Os. Comparison with values obtained in the rigid rotor limit and in the vibrator limit.
doi: 10.1103/PhysRevC.99.024316
2017KA10 Phys.Rev. C 95, 034316 (2017) V.Karayonchev, J.-M.Regis, J.Jolie, A.Blazhev, R.Altenkirch, S.Ansari, M.Dannhoff, F.Diel, A.Esmaylzadeh, C.Fransen, R.-B.Gerst, K.Moschner, C.Muller-Gatermann, N.Saed-Samii, S.Stegemann, N.Warr, K.O.Zell Evolution of collectivity in the N=100 isotones near 170Yb NUCLEAR REACTIONS 168Er(α, 2n), E=27 MeV; measured Eγ, Iγ, level half-lives by γγ(t) using electronic γ-γ fast-timing technique using HPGe detectors and LaBr3(Ce) detectors at Cologne 10 MV FN-Tandem accelerator. 170Yb; deduced levels, yrast band, B(E2). Comparison with confined beta soft (CBS) model calculations, X(5) predictions, and with previous experimental results. Systematics of ground state band energies and B(E2) in N=100 isotones of 168Er, 170Yb, 172Hf, 174W and 176Os.
doi: 10.1103/PhysRevC.95.034316
2015RU03 Phys.Rev. C 91, 044301 (2015) M.Rudigier, K.Nomura, M.Dannhoff, R-B.Gerst, J.Jolie, N.Saed-Samii, S.Stegemann, J.-M.Regis, L.M.Robledo, R.Rodriguez-Guzman, A.Blazhev, Ch.Fransen, N.Warr, K.O.Zell Evolution of E2 transition strength in deformed hafnium isotopes from new measurements on 172Hf, 174Hf, and 176Hf NUCLEAR REACTIONS 170,172Yb(α, 2n), E=27 MeV; 174Yb(α, 2n), E=26 MeV; measured conversion-electron momentum spectra using Cologne Orange magnetic spectrometer, Eγ, Iγ, γγ-, (ce)γγ-coin, level half-lives by (ce)γ(t) and γγ(t) methods with emphasis on the first 2+ states. 172,174,176Hf; deduced levels, J, π, B(E2). Comparison with previous results, and with theoretical model calculations. NUCLEAR STRUCTURE 168,170,172,174,176,178,180Hf; calculated contour plots of the deformation energy surfaces in (β, γ) plane for 168Hf to 176Hf, parameters for the IBM Hamiltonian, levels, J, π, moments of inertia and B(E2) for levels in the ground-state rotational band. Interacting boson model with Hamiltonian from Gogny HFB calculations using the D1M interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.91.044301
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