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NSR database version of May 24, 2024.

Search: Author = R.Altenkirch

Found 6 matches.

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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
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2017KO34      Eur.Phys.J. A 53, 175 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, A.Astier, R.Altenkirch, S.Ansari, Th.Braunroth, M.L.Cortes, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, J.Litzinger, C.Muller-Gatermann, P.Petkov, M.Rudigier, M.Scheck, Ph.Scholz, P.Spagnoletti, M.Spieker, C.Stahl, R.Stegmann, M.Stoyanova, P.Thole, N.Warr, V.Werner, W.Witt, D.Wolk, K.O.Zell, P.Van Isacker, V.Yu.Ponomarev

A revised B(E2;2+1 → 0+1) value in the semi-magic nucleus 210Po

NUCLEAR REACTIONS 208Pb(12C, 10Be), E=62 MeV; measured Eγ, Iγ(θ), γγ-coin, (particle)γ-coin using 11 HPGe, light reaction fragments using solar cells array. 210Po; deduced 2+1 state T1/2 using the line shape of the transition, branching ratios to this state from upper states, B(E1), B(E2), B(E3), B(M1), T1/2 of three states and transitions; calculated low-lying states energy, structure, B(E1), B(E2), B(E3), B(M1) using QPM (Quasiparticle Phonon Model). Compared with data.

doi: 10.1140/epja/i2017-12367-5
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2017KO38      Phys.Rev. C 96, 044305 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, R.Altenkirch, S.Ansari, A.Astier, M.Bast, M.Beckers, Th.Braunroth, M.Cappellazzo, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Goldkuhle, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, Th.Kroll, J.Litzinger, K.Moschner, C.Muller-Gatermann, P.Petkov, M.Scheck, Ph.Scholz, T.Schmidt, P.Spagnoletti, C.Stahl, R.Stegmann, A.Stolz, A.Vogt, N.Warr, V.Werner, D.Wolk, J.C.Zamora, K.O.Zell, V.Yu.Ponomarev, P.Van Isacker

Low collectivity of the 2+1 state of 212Po

NUCLEAR REACTIONS 208Pb(12C, 8Be)212Po, E=64 MeV; measured Eγ, Iγ, (particle)γ-coin, half-life of the first 2+ state by recoil-distance Doppler-shift (RDDS) method at the FN Tandem facility of the University of Cologne. 212Po; deduced levels, J, π, B(E2). Comparisons with levels and B(E2) of 210Po and 210Pb, and with theoretical calculations using shell model. Systematics of B(E2) values for the first 2+ states in 20Ne, 44Ti, 52Ti, 136Te, 212Po, nuclei with two valence protons and two valence neutrons.

doi: 10.1103/PhysRevC.96.044305
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2017QU05      Phys.Rev. C 96, 044313 (2017)

M.Queiser, A.Vogt, M.Seidlitz, P.Reiter, T.Togashi, N.Shimizu, Y.Utsuno, T.Otsuka, M.Honma, P.Petkov, K.Arnswald, R.Altenkirch, B.Birkenbach, A.Blazhev, T.Braunroth, A.Dewald, J.Eberth, C.Fransen, B.Fu, H.Hess, R.Hetzenegger, R.Hirsch, J.Jolie, V.Karayonchev, L.Kaya, L.Lewandowski, C.Muller-Gatermann, J.-M.Regis, D.Rosiak, D.Schneiders, B.Siebeck, T.Steinbach, K.Wolf, K.-O.Zell

Cross-shell excitations from the fp shell: Lifetime measurements in 61Zn

NUCLEAR REACTIONS 40Ca(24Mg, n2p), E=77 MeV; 58Ni(α, n), E=19 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), level half-lives by recoil-distance Doppler-shift (RDDS) method using Cologne plunger device and an array of 12 HPGe detectors, and by γγ(t) electronic fast timing technique using eight HPGe detectors and eight LaBr3:Ce detectors at the Tandem accelerator facility of the University of Cologne. 61Zn; deduced high-spin levels, nano-second isomers, J, π, multipolarities, mixing ratios, B(E2), B(E1), B(M1), B(M2), configurations, deformation. Comparison with shell-model calculations using jj44b, GXPF1, GXPF1A, and GXPF1Br+VMU interactions.

doi: 10.1103/PhysRevC.96.044313
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2015SI01      Phys.Rev. C 91, 014311 (2015)

B.Siebeck, M.Seidlitz, A.Blazhev, P.Reiter, R.Altenkirch, C.Bauer, P.A.Butler, H.De Witte, J.Elseviers, L.P.Gaffney, H.Hess, M.Huyse, T.Kroll, R.Lutter, J.Pakarinen, N.Pietralla, F.Radeck, M.Scheck, D.Schneiders, C.Sotty, P.Van Duppen, M.Vermeulen, D.Voulot, N.Warr, F.Wenander

Testing refined shell-model interactions in the sd shell: Coulomb excitation of 26Na

NUCLEAR REACTIONS 104Pd(26Na, 26Na'), E=2.82 MeV/nucleon, [secondary 26Na beam from U(p, X), E=1 GeV primary reaction]; measured Eγ, Iγ, (scattered particle)γ-coin using REX-ISOLDE facility and MINIBALL array at CERN. Coulomb excitation. 26Na; deduced levels, J, π, B(E2), B(M1), configuration. 104Pd; B(E2) for first 2+ used for normalization of data for 26Na. Analysis by coupled channels Coulomb excitation code GOSIA2. Comparison with shell model calculations using USD, USDA and USDB interactions.

doi: 10.1103/PhysRevC.91.014311
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2014SE02      Phys.Rev. C 89, 024309 (2014)

M.Seidlitz, P.Reiter, R.Altenkirch, B.Bastin, C.Bauer, A.Blazhev, N.Bree, B.Bruyneel, P.A.Butler, J.Cederkall, T.Davinson, H.De Witte, D.D.DiJulio, J.Diriken, L.P.Gaffney, K.Geibel, G.Georgiev, R.Gernhauser, M.Huyse, N.Kesteloot, T.Kroll, R.Krucken, R.Lutter, J.Pakarinen, F.Radeck, M.Scheck, D.Schneiders, B.Siebeck, C.Sotty, T.Steinbach, J.Taprogge, P.Van Duppen, J.Van de Walle, D.Voulot, N.Warr, F.Wenander, K.Wimmer, P.J.Woods, K.Wrzosek-Lipska

Coulomb excitation of 29, 30Na: Mapping the borders of the island of inversion

NUCLEAR REACTIONS 104Pd(29Na, 29Na'), (30Na, 30Na'), E=2.85 MeV/nucleon; 120Sn(30Na, 30Na'), E=2.85 MeV/nucleon, [secondary 29,30Na beams from U(p, X), E=1.4 GeV primary reaction]; measured Eγ, Iγ, scattered particle spectra, γγ-, (particle)γγ-coin using MINIBALL array, REXEBIS and Penning trap system at REX-ISOLDE-CERN facility. Coulomb excitation, GOSIA analysis. 29,30Na; deduced levels, J, π, B(E2), B(M1), intruder admixtures, island of inversion. 104Pd; deduced level, excitation yield; used for normalizing data for 29Na. Comparison with previous experimental results, and with Monte Carlo shell model calculations.

doi: 10.1103/PhysRevC.89.024309
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