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NSR database version of April 11, 2024.

Search: Author = R.Kern

Found 8 matches.

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2022DA06      Phys.Rev. C 105, L031304 (2022)

B.Das, B.Cederwall, C.Qi, M.Gorska, P.H.Regan, O.Aktas, H.M.Albers, A.Banerjee, M.M.R.Chishti, J.Gerl, N.Hubbard, S.Jazrawi, J.Jolie, A.K.Mistry, M.Polettini, A.Yaneva, S.Alhomaidhi, J.Zhao, T.Arici, S.Bagchi, G.Benzoni, P.Boutachkov, T.Davinson, T.Dickel, E.Haettner, O.Hall, Ch.Hornung, J.P.Hucka, P.R.John, I.Kojouharov, R.Knobel, D.Kostyleva, N.Kuzminchuk, I.Mukha, W.R.Plass, B.S.Nara Singh, J.Vasiljevic, S.Pietri, Zs.Podolyak, M.Rudigier, H.Rosch, E.Sahin, H.Schaffner, C.Scheidenberger, F.Schirru, A.Sharma, R.Shearman, Y.Tanaka, J.Vesic, H.Weick, H.J.Wollersheim, U.Ahmed, A.Algora, C.Appleton, J.Benito, A.Blazhev, A.Bracco, A.M.Bruce, M.Brunet, R.Canavan, A.Esmaylzadeh, L.M.Fraile, G.Hafner, H.Heggen, D.Kahl, V.Karayonchev, R.Kern, A.Korgul, G.Kosir, N.Kurz, R.Lozeva, M.Mikolajczuk, P.Napiralla, R.Page, C.M.Petrache, N.Pietralla, J.-M.Regis, P.Ruotsalainen, L.Sexton, V.Sanchez-Temble, M.Si, J.Vilhena, V.Werner, J.Wiederhold, W.Witt, P.J.Woods, G.Zimba

Nature of seniority symmetry breaking in the semimagic nucleus 94Ru

RADIOACTIVITY 95mPd(β+p)[from 9Be(124Xe, F), E=850 MeV/nucleon];measured Eγ, Iγ, Ep, Ip, γγ-coin, pγ-coin. 94Ru; deduced T1/2 of low-lying excited states, B(E2). Comparison to shell-model calculations. Ions were separated with FRS at GSI and implanted in the Advanced Implantation Detector Array (AIDA), composed of three double-sided silicon strip detectors (DSSSDs) situated at the center of the DEcay SPECtroscopy (DESPEC) setup, comprised of a hybrid array of six triple cluster high-purity germanium (HPGe) detectors and 36 LaBr3(Ce) detectors of the FAst TIMing Array (FATIMA).

doi: 10.1103/PhysRevC.105.L031304
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2021KA36      Phys.Rev. C 104, 024311 (2021)

D.Kalaydjieva, D.Kocheva, G.Rainovski, V.Karayonchev, J.Jolie, N.Pietralla, M.Beckers, A.Blazhev, A.Dewald, M.Djongolov, A.Esmaylzadeh, C.Fransen, K.A.Gladnishki, A.Goldkuhle, C.Henrich, I.Homm, K.E.Ide, P.R.John, R.Kern, J.Kleemann, Th.Kroll, C.Muller-Gatermann, M.Scheck, P.Spagnoletti, M.Stoyanova, K.Stoychev, V.Werner, A.Yaneva, S.S.Dimitrova, G.De Gregorio, H.Naidja, A.Gargano

Microscopic structure of the one-phonon 2+ states of 208Po

NUCLEAR REACTIONS 204Pb(12C, 8Be)208Po, E=62 MeV; measured Eγ, Iγ, (particle)γ-coin, half-lives of the first 2+ and 4+ levels by recoil-distance Doppler-shift (RDDS) method using the Cologne plunger device at the FN Tandem facility of the University of Cologne. 208Po; deduced levels, J, π, B(E2). Comparison with large-scale shell-model calculations.

NUCLEAR STRUCTURE 208Po; calculated levels, J, π, B(E2), B(M1), magnetic dipole and electric quadrupole moments using large-scale shell-model calculations with an effective interaction derived from the realistic CD-Bonn nucleon-nucleon potential. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.024311
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2020KE07      Phys.Rev. C 102, 041304 (2020)

R.Kern, R.Zidarova, N.Pietralla, G.Rainovski, R.Stegmann, A.Blazhev, A.Boukhari, J.Cederkall, J.G.Cubiss, M.Djongolov, C.Fransen, L.P.Gaffney, K.Gladnishki, E.Giannopoulos, H.Hess, J.Jolie, V.Karayonchev, L.Kaya, J.M.Keatings, D.Kocheva, Th.Kroll, O.Moller, G.G.O'Neill, J.Pakarinen, P.Reiter, D.Rosiak, M.Scheck, J.Snall, P.-A.Soderstrom, P.Spagnoletti, M.Stoyanova, S.Thiel, A.Vogt, N.Warr, A.Welker, V.Werner, J.Wiederhold, H.De Witte

Restoring the valence-shell stabilization in 140Nd

NUCLEAR REACTIONS 208Pb(140Nd, 140Nd'), E=4.62 MeV/nucleon, [140Nd beam from Ta(p, X), E=1.4 GeV at HIE-ISOLDE-CERN, and isotopic selection by RILIS and REXEBIS]; measured Eγ, Iγ, scattered particles, (particle)γ- and (particle)γγ-coin using Miniball array and double-sided silicon strip detector (DSSD). 140Nd; deduced levels, J, π, Coulomb excitation cross sections, B(E2), B(E3), B(M1) by analyzing data using multistep Coulomb-excitation least-squares fitting code GOSIA, identification of the third 2+ state as the main fragment of the one-quadrupole-phonon proton-neutron mixed-symmetry state, and degree of F-spin mixing. Systematics of B(M1) strengths for N=80 isotones of 132Te, 134Xe, 136Ba, 138Ce and 140Nd, and compared with theoretical predictions.

doi: 10.1103/PhysRevC.102.041304
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2020YA24      Eur.Phys.J. A 56, 246 (2020)

A.Yaneva, D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, A.Dewald, M.Djongolov, C.Fransen, K.A.Gladnishki, C.Henrich, I.Homm, K.E.Ide, P.R.John, D.Kalaydjieva, V.Karayonchev, R.Kern, J.Kleemann, Th.Kroll, C.Muller-Gatermann, M.Scheck, P.Spagnoletti, M.Stoyanova, V.Werner

Experimental evidence for low-lying quadrupole isovector excitation of 208Po

NUCLEAR REACTIONS 204Pb(12C, 8Be), E=62 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin. 208Po; deduced γ-ray energies and intensities, level lifetimes, B(E2), B(M1) using the Doppler-shift attenuation method.

doi: 10.1140/epja/s10050-020-00259-w
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2019KE01      Phys.Rev. C 99, 011303 (2019)

R.Kern, R.Stegmann, N.Pietralla, G.Rainovski, M.P.Carpenter, R.V.F.Janssens, M.Lettmann, O.Moller, T.Moller, C.Stahl, V.Werner, S.Zhu

Nuclear isovector valence-shell excitation of 202Hg

NUCLEAR REACTIONS 12C(202Hg, 202Hg'), E=890 MeV; measured Eγ, Iγ, γ(θ), γγ-coin using the Gammasphere array at ATLAS-ANL facility. 202Hg; deduced levels, J, π, multipolarities, mixing ratios, B(E1), B(E2), B(E3), B(M1), mixed-symmetry 2+ state, upper limits for the F-spin mixing matrix elements from analysis of data for 136Ba, 138Ce, 202Hg, and 204Hg. Comparison with previous experimental values in the Nuclear Data Sheets.

doi: 10.1103/PhysRevC.99.011303
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2019ST13      Phys.Rev. C 100, 064304 (2019)

M.Stoyanova, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, M.Beckers, A.Dewald, M.Djongolov, A.Esmaylzadeh, C.Fransen, L.M.Gerhard, K.A.Gladnishki, S.Herb, P.R.John, V.Karayonchev, J.M.Keatings, R.Kern, L.Knafla, D.Kocheva, L.Kornwebel, Th.Kroll, M.Ley, K.M.Mashtakov, C.Muller-Gatermann, J.-M.Regis, M.Scheck, K.Schomacker, J.Sinclair, P.Spagnoletti, C.Surder, N.Warr, V.Werner, J.Wiederhold

Lifetimes of the 4+1 states of 206Po and 204Po: A study of the transition from noncollective seniority-like mode to collectivity

NUCLEAR REACTIONS 197Au(11B, 4n)204Po, E=55 MeV; 198Pt(12C, 4n)206Po, E=65 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by γγ(t) fast timing technique using the HORUS spectrometer of the FN Tandem facility at the University of Cologne. 204,206Po; deduced levels, J, π, B(E2) for the first 4+ states in both the isotopes, and for the first 2+ in 204Po, configurations; discussed transition from single-particle seniority like mode to collective mode. Comparison with two-state mixing calculations. Systematics of energies, R4/2 ratios, B(E2) and magnetic moments for the yrast levels in 200,202,204,206,208,210Po.

doi: 10.1103/PhysRevC.100.064304
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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
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2016WI08      Phys.Rev. C 94, 044302 (2016)

J.Wiederhold, R.Kern, C.Lizarazo, N.Pietralla, V.Werner, R.V.Jolos, D.Bucurescu, N.Florea, D.Ghita, T.Glodariu, R.Lica, N.Marginean, R.Marginean, C.Mihai, R.Mihai, I.O.Mitu, A.Negret, C.Nita, A.Olacel, S.Pascu, L.Stroe, S.Toma, A.Turturica

Fast-timing lifetime measurement of 152Gd

NUCLEAR REACTIONS 149Sm(α, n), E=17.5 MeV; measured Eγ, γγ-coin, level half-lives by γγ(t) fast timing technique (FEST) at NIPNE-Bucharest Tandem accelerator facility. 152Gd; deduced levels, B(E2), E0 transition strength for excited 0+ state to the ground state, indication of a quantum phase transition (QPT). Comparison with previous experimental results. Systematics of B(E2) products and E0 strength for 146,148,150,152,154,156,158Gd, 148,150,152,154Sm.

RADIOACTIVITY 152Eu(β-), (EC); measured Eγ, level half-lives by γγ(t) fast-timing technique. 152Gd, 152Sm; deduced levels, B(E2).

doi: 10.1103/PhysRevC.94.044302
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