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NSR database version of April 26, 2024.

Search: Author = F.Dunkel

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2024KU05      Phys.Rev. C 109, 024304 (2024)

D.Kumar, A.Pal, S.Basak, T.Bhattacharjee, S.S.Alam, L.Gerhard, L.Knafla, A.Esmaylzadeh, M.Ley, F.Dunkel, K.Schomaker, J.-M.Regis, J.Jolie, Y.H.Kim, U.Koster

Lifetime measurement for the 15/2^-₁ and 13/2^-₁ levels in ¹²⁹Sn

doi: 10.1103/PhysRevC.109.024304
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2024VO01      Phys.Rev. C 109, 024325 (2024)

F.von Spee, M.Beckers, A.Blazhev, A.Dewald, F.Dunkel, A.Esmaylzadeh, C.Fransen, G.Hackenberg, J.Jolie, L.Knafla, C.-D.Lakenbrink, M.Schiffer, N.Warr, M.Weinert

Structure of low-lying states in ¹¹⁶Te

doi: 10.1103/PhysRevC.109.024325
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2023BO01      Phys.Rev. C 107, 014322 (2023)

S.Bottoni, E.R.Gamba, G.De Gregorio, A.Gargano, S.Leoni, B.Fornal, N.Brancadori, G.Ciconali, F.C.L.Crespi, N.Cieplicka-Orynczak, L.W.Iskra, G.Colombi, Y.H.Kim, U.Koster, C.Michelagnoli, F.Dunkel, A.Esmaylzadeh, L.Gerhard, J.Jolie, L.Knafla, M.Ley, J.-M.Regis, K.Schomaker, M.Sferrazza

Testing the predictive power of realistic shell model calculations via lifetime measurement of the 11/2⁺ state in ¹³¹Sb

NUCLEAR REACTIONS ²³⁵U(n, F)¹³¹Sb, E=thermal; measured fission fragments, Eγ, Iγ, γγ-coin, (fragment)γ-coin. ¹³¹Sb; deduced levels, J, π, T_1/2 for transitions from excited states, B(E2). Lifetimes obtained with generalized centroid difference (GCD) method. Systematics of 2⁺ states energies in Sn isotopes compared with 11/2⁺ states in Sb isotopes. Comparison to realistic shell-model calculations performed with KSHELL code. LOHENGRIN spectrometer together with 2 HPGe and 5 LaBr₃(Ce) detectors (ILL).

doi: 10.1103/PhysRevC.107.014322
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Data from this article have been entered in the XUNDL database. For more information, click here.

2023LA11      Eur.Phys.J. A 59, 290 (2023)

C.-D.Lakenbrink, M.Beckers, A.Blazhev, A.Dewald, F.Dunkel, A.Esmaylzadeh, Ch.Fransen, J.Jolie, L.Knafla, C.Muller-Gatermann, F.von Spee, K.-O.Zell

Lifetime measurement of excited states in ¹¹⁶Xe

NUCLEAR REACTIONS ¹⁰²Pd(¹⁶O, 2n), E=62 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies, J, π, level T_1/2, B(E2), The recoil-distance Doppler-shift (RDDS) technique, the FN-tandem accelerator at the University of Cologne, Germany, using the Cologne coincidence plunger device.

doi: 10.1140/epja/s10050-023-01204-3
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Data from this article have been entered in the XUNDL database. For more information, click here.

2023ST05      Phys.Rev. C 108, 014316 (2023)

K.Stoychev, M.Djongolov, V.Karayonchev, G.Rainovski, M.Ley, J.Jolie, D.Bittner, A.Blazhev, F.Dunkel, A.Esmaylzadeh, C.Fransen, J.Garbe, L.M.Gerhard, R.-B.Gerst, K.Geusen, K.A.Gladnishki, G.Hafner, D.Kalaydjieva, L.Klockner, L.Knafla, D.Kocheva, L.Kornwebel, C.Muller-Gatermann, E.Nikodem, J.-M.Regis, K.Schomacker, M.Stoyanova

X-ray-γ fast-timing lifetime measurement of the 6⁺₁ state in ²⁰⁶Po

RADIOACTIVITY ²⁰⁶Po(IT)[from successive EC decay of ²⁰⁶Rn(EC)-²⁰⁶At(EC) produced in ¹⁹⁴Pt(¹⁶O, 4n)²⁰⁶Rn, E=84 MeV]; measured X-rays, Eγ, Iγ, (X-rays)γ-coin, γγγ-coin. ²⁰⁶Po; deduced levels, J, π, T_1/2 of the 4⁺ and 6⁺ excited states, B(E2). Lifetimes extracted via the generalized centroid difference (GCD) method. Systematics of the B(E2) for even-even Po isotopes with N<126. HORUS spectrometer consisting of 8 coaxial HPGe and 11 LaBr detectors at the FN-Tandem facility (Institute for Nuclear Physics, University of Cologne).

doi: 10.1103/PhysRevC.108.014316
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Data from this article have been entered in the XUNDL database. For more information, click here.

2022HA24      Phys.Rev. C 106, 024326 (2022)

A.Harter, L.Knafla, G.Friessner, G.Hafner, J.Jolie, A.Blazhev, A.Dewald, F.Dunkel, A.Esmaylzadeh, C.Fransen, V.Karayonchev, K.Lawless, M.Ley, J.-M.Regis, K.O.Zell

Lifetime measurements in the tungsten isotopes ^{176, 178, 180}W

NUCLEAR REACTIONS ¹⁶⁴Dy(¹⁶O, 4n)¹⁷⁶W, E=80 MeV; ¹⁷²Yb(⁹Be, 3n)¹⁷⁸W, E=40 MeV; ¹⁸¹Ta(p, 2n)¹⁸⁰W, E=16 MeV; measured E(ce), Eγ, (ce)γ-coin, (ce)γγ-coin, γγ-coin, level T_1/2 by (ce)γ(t) fast-timing method, and by recoil-distance Doppler-shift method using Cologne iron-free Orange spectrometer for conversion electrons, Cologne HORUS spectrometer for γ radiation, and Cologne coincidence plunger setup at the 10 MV FN Tandem accelerator of IKP-Cologne. ^176,178,180W; deduced levels, J, π, T_1/2, B(E2) of yrast positive-parity states up to 10+ for ¹⁷⁶W and up to 8+ for ^178,180W. Comparison with previous available experimental results, and with IBM-1 model calculations. Experimental and theoretical (by IBM-1 model with SU(3) and X(5) limits) systematics of excitation energies, deformation parameter β, quadrupole moment, B(E2), E(first 4+)/E(first 2+), B(E2)(first 4+)/B(E2)(first 2+) for ^{168,170,172,174,176,178,180,182,184,186}W.

doi: 10.1103/PhysRevC.106.024326
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Data from this article have been entered in the XUNDL database. For more information, click here.

2022KU31      Phys.Rev. C 106, 034306 (2022)

D.Kumar, T.Bhattacharjee, S.S.Alam, S.Basak, L.Gerhard, L.Knafla, A.Esmaylzadeh, M.Ley, F.Dunkel, K.Schomaker, J.-M.Regis, J.Jolie, Y.H.Kim, U.Koster, G.S.Simpson, L.M.Fraile

Lifetimes and transition probabilities for low-lying yrast levels in ^{130, 132}Te

RADIOACTIVITY ^130,132Sb(β^-); ^130m,132mTe(IT) [from ²³³U(n, γ), E=thermal, followed by mass-separation of fission fragments by the Lohengrin separator at Institut Laue-Langevin, Grenoble]; measured Eγ, Iγ, γγ-coin, isomer and level T_1/2 by γ(t) and γγ(t) fast-timing method using four LaBr₃(Ce) detectors and two Clover HPGe detectors, and analyzed using generalized centroid difference (GCD) method, and by slope method. ^130,132Te; deduced levels, T_1/2 of levels and isomers, B(E2) for yrast members of the g.s. bands up to 10+, configurations. Comparison with large-basis shell model calculations, and with previous experimental results. Systematics of B(E2) values for g.s. band members up to 10+ for ^{126,128,130,132,134}Te.

doi: 10.1103/PhysRevC.106.034306
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Data from this article have been entered in the XUNDL database. For more information, click here.

2022OL03      Phys.Rev. C 105, 054319 (2022)

S.D.Olorunfunmi, R.Neveling, J.Carter, P.von Neumann-Cosel, I.T.Usman, P.Adsley, A.Bahini, L.P.L.Baloyi, J.W.Brummer, L.M.Donaldson, H.Jivan, N.Y.Kheswa, K.C.W.Li, D.J.Marin-Lambarri, P.T.Molema, C.S.Moodley, G.G.O'Neill, P.Papka, L.Pellegri, V.Pesudo, E.Sideras-Haddad, F.D.Smit, G.F.Steyn, A.A.Avaa, F.Diel, F.Dunkel, P.Jones, V.Karayonchev

Evolution of the isoscalar giant monopole resonance in the Ca isotope chain

NUCLEAR REACTIONS Ca, ^42,44,48Ca(α, α'), E=196 MeV; measured Eα, Iα; deduced σ(θ), isoscalar giant monopole resonance strength distribution in the 9.5-25.5 MeV range, nucleus incompressibility K_A. Analysis with difference-of-spectra (DoS) technique using measurements at 2 different angular covege settings of the spectrometer. Comparison to previous experimental results. K600 magnetic spectrometer at iThemba LABS.

doi: 10.1103/PhysRevC.105.054319
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD1023.

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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Data from this article have been entered in the XUNDL database. For more information, click here.

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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Data from this article have been entered in the XUNDL database. For more information, click here.