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NSR database version of April 26, 2024.

Search: Author = L.Gerhard

Found 8 matches.

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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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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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2023PA40      Eur.Phys.J. A 59, 276 (2023)

G.Pasqualato, S.Ansari, J.S.Heines, V.Modamio, A.Gorgen, W.Korten, J.Ljungvall, E.Clement, J.Dudouet, A.Lemasson, T.R.Rodriguez, J.M.Allmond, T.Arici, K.S.Beckmann, A.M.Bruce, D.Doherty, A.Esmaylzadeh, E.R.Gamba, L.Gerhard, J.Gerl, G.Georgiev, D.P.Ivanova, J.Jolie, Y.-H.Kim, L.Knafla, A.Korichi, P.Koseoglou, M.Labiche, S.Lalkovski, T.Lauritsen, H.-J.Li, L.G.Pedersen, S.Pietri, D.Ralet, J.M.Regis, M.Rudigier, S.Saha, E.Sahin, S.Siem, P.Singh, P.-A.Soderstrom, C.Theisen, T.Tornyi, M.Vandebrouck, W.Witt, M.Zielinska, D.Barrientos, P.Bednarczyk, G.Benzoni, A.J.Boston, H.C.Boston, A.Bracco, B.Cederwall, M.Ciemala, G.de France, C.Domingo-Pardo, J.Eberth, A.Gadea, V.Gonzalez, A.Gottardo, L.J.Harkness-Brennan, H.Hess, D.S.Judson, A.Jungclaus, S.M.Lenzi, S.Leoni, R.Menegazzo, D.Mengoni, C.Michelagnoli, D.R.Napoli, J.Nyberg, Zs.Podolyak, A.Pullia, F.Recchia, P.Reiter, K.Rezynkina, M.D.Salsac, E.Sanchis, M.Senyigit, M.Siciliano, J.Simpson, D.Sohler, O.Stezowski, J.J.Valiente-Dobon, D.Verney

Shape evolution in even-mass ^98-104Zr isotopes via lifetime measurements using the γγ coincidence technique

NUCLEAR REACTIONS ⁹Be(²³⁸U, X)⁹⁸Zr/¹⁰⁰Zr/¹⁰²Zr/¹⁰⁴Zr, E=6.2 MeV/nucleon; measured reaction products, Eγ, Iγ, γ-γ-coin. ¹⁰⁴Mo, ¹⁰²Nb; deduced γ-ray energies and relative intensities, J, π, level T_1/2, B(E2), shape coexistence. Comparison with calculated values. The Differential Decay Curve Method (DDCM), the Recoil Distance Doppler Shift technique. The magnetic spectrometer VAMOS++, GANIL, the Orsay Universal Plunger system.

doi: 10.1140/epja/s10050-023-01172-8
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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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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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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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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, R_4/2 ratios, B(E2) and magnetic moments for the yrast levels in ^{200,202,204,206,208,210}Po.

doi: 10.1103/PhysRevC.100.064304
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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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Note: The following list of authors and aliases matches the search parameter L.Gerhard: , L.M.GERHARD