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NSR database version of April 26, 2024.

Search: Author = M.Dannhoff

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2019KA13      Phys.Rev. C 99, 024326 (2019)

V.Karayonchev, A.Blazhev, A.Esmaylzadeh, J.Jolie, M.Dannhoff, F.Diel, F.Dunkel, C.Fransen, L.M.Gerhard, R.-B.Gerst, L.Knafla, L.Kornwebel, C.Muller-Gatermann, J.-M.Regis, N.Warr, K.O.Zell, M.Stoyanova, P.Van Isacker

Lifetimes in ²¹¹At and their implications for the nuclear structure above ²⁰⁸Pb

NUCLEAR REACTIONS ²⁰⁸Pb(⁶Li, 3n), E=34 MeV; measured Eγ, Iγ, γγ-coin, half-lives of 13/2-, 17/2- and 23/2- levels in ²¹¹At by γγ-coin fast timing technique using HPGe detectors and LaBr₃(Ce) scintillators for γ-rays at the Institute for Nuclear Physics, University of Cologne. ²¹¹At; deduced levels, B(M1), B(E2). Comparison with shell model calculations, and previous experimental values.

NUCLEAR STRUCTURE ²⁰⁹Bi, ²¹⁰Po, ²¹¹At; calculated B(E2), magnetic dipole moments, B(M1) using two shell-model calculations: semiempirical interaction for three particles in a single j=9/2 shell, and the modified Kuo-Herling interaction in a multi-j model space. Comparison with experimental values.

doi: 10.1103/PhysRevC.99.024326
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2018ES04      Phys.Rev. C 98, 014313 (2018)

A.Esmaylzadeh, L.M.Gerhard, V.Karayonchev, J.-M.Regis, J.Jolie, M.Bast, A.Blazhev, T.Braunroth, M.Dannhoff, F.Dunkel, C.Fransen, G.Hafner, L.Knafla, M.Ley, C.Muller-Gatermann, K.Schomacker, N.Warr, K.-O.Zell

Lifetime determination in ^{190, 192, 194, 196}Hg via γ-γ fast-timing spectroscopy

NUCLEAR REACTIONS ¹⁷⁸Hf(¹⁶O, 4n)¹⁹⁰Hg, E=87 MeV; ¹⁸⁴W(¹²C, 4n)¹⁹²Hg, E=66 MeV; ¹⁸⁶W(¹²C, 4n)¹⁹⁴Hg, E=64 MeV; ¹⁹⁷Au(p, 2n)¹⁹⁶Hg, E=17 MeV; measured Eγ, Iγ, level half-lives of first 2+ and 4+ states in ^{190,192,194,196}Hg, first 7- in ¹⁹²Hg, first 9- in ¹⁹⁴Hg and first 5- in ¹⁹⁶Hg by γγ-coin fast-timing technique using HORUS array and LaBr₃(Ce) detectors at the Cologne University Institute of Nuclear Physics ^{190,192,194,196}Hg; deduced levels, J, π, B(E2), B(E1). Comparison with theoretical calculations using interacting boson model configuration mixing (IBM-CM), and interacting boson model-2 (IBM-2). Systematics of excitation energies of yrast states, E(first 4+)/E(first 2+) ratios, and B(E2) for first 2+ and 4+ states in A=172-204 Hg isotopes.

doi: 10.1103/PhysRevC.98.014313
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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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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 ^{168,170,172,174,176,178,180}Hf; 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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