NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = F.von Spee Found 12 matches. 2024KN01 Phys.Rev. C 109, 014313 (2024) L.Knafla, K.Nomura, A.Esmaylzadeh, A.Harter, J.Jolie, V.Karayonchev, Y.H.Kim, U.Koster, M.Ley, C.Michelagnoli, A.Pfeil, J.-M.Regis, F.von Spee Investigating the prolate-to-oblate shape phase transition: Lifetime measurements and γ spectroscopy of the low-lying negative parity structure in 193Os
doi: 10.1103/PhysRevC.109.014313
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
2023BE08 Eur.Phys.J. A 59, 129 (2023) M.Beckers, C.Muller-Gatermann, K.Arnswald, T.Braunroth, A.Dewald, C.Fransen, A.Goldkuhle, F.von Spee Lifetime measurement of the 2+1, 4+1 states in semi-magic 60Ni NUCLEAR REACTIONS 40Ca(23Na, 3p), E=62 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies, level T1/2, B(E2). Comparison with Shell-Model calculations. Differential Decay Curve Method (DDCM), the Institute for Nuclear Physics of the University of Cologne FN tandem accelerator.
doi: 10.1140/epja/s10050-023-01031-6
2023KN04 Nucl.Instrum.Methods Phys.Res. A1052, 168279 (2023) L.Knafla, A.Harter, M.Ley, A.Esmaylzadeh, J.-M.Regis, D.Bittner, A.Blazhev, F.von Spee, J.Jolie Improving fast-timing time-walk calibration standards: Lifetime measurement of the 2+1 state in 152Gd RADIOACTIVITY 152Eu(β-); measured decay products, Eγ, Iγ; deduced γ-ray energies, the lifetime of the 2+ state. Comparison with available data. Fast-timing lifetime measurements.
doi: 10.1016/j.nima.2023.168279
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 T1/2, 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
2022BE25 Nucl.Instrum.Methods Phys.Res. A1042, 167416 (2022) M.Beckers, A.Dewald, C.Fransen, L.Kornwebel, C.-D.Lakenbrink, F.von Spee Revisiting the measurement of absolute foil-separation for RDDS measurements and introduction of an optical measurement method NUCLEAR REACTIONS 181Ta(32S, 32S), E=85 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, partial level scheme, absolute foil separations for plunger measurements using a high precision optical distance probe. The capacitance method, the Cologne FN Tandem accelerator.
doi: 10.1016/j.nima.2022.167416
2022ES05 Phys.Rev. C 106, 064323 (2022) A.Esmaylzadeh, A.Blazhev, K.Nomura, J.Jolie, M.Beckers, C.Fransen, R.-B.Gerst, A.Harter, V.Karayonchev, L.Knafla, M.Ley, F.von Spee Investigation of γ softness: Lifetime measurements in 104, 106Ru NUCLEAR REACTIONS 104Ru(18O, 18O), (18O, 16O), E=57 MeV; measured reaction products, Eγ, Iγ, (particle)γ-coin. 104,106Ru; deduced levels, J, π, T1/2 of low-lying excited states, B(E2), B(M1), shape invariants. Recoil-distance Doppler shift technique. Comparison to mapped-IBM calculation based on a microscopic energy density functional, to the values obtained with Wilets-Jean γ-soft model and to previous experimental data. Results indicate γ-softness and point on traixilaity in 104,106Ru. Cologne plunger device in conjunction with 11 HPGe detectors arranged in backward and forward rings combined with 6 PIN diodes for detecting the backscattered beam-like light recoiling fragments 10 MV FN-Tandem accelerator.
doi: 10.1103/PhysRevC.106.064323
2020BE15 Phys.Rev. C 102, 014324 (2020) M.Beckers, C.Muller-Gatermann, A.Blazhev, T.Braunroth, A.Dewald, C.Fransen, A.Goldkuhle, L.Kornwebel, J.Litzinger, F.von Spee, K.-O.Zell Lifetime measurement of excited states in 144Ce: Enhanced E1 strengths in a candidate for octupole deformation NUCLEAR REACTIONS 142Ce(18O, 16O), E=67 MeV; measured Eγ, Iγ, (16O)γ-coin, half-lives of the first 2+, 3-, 4+ and 6+, and second 4+ states by recoil-distance Doppler-shift method at the Cologne FN Tandem accelerator. 144Ce; deduced levels, J, π, B(E1), B(E2), enhanced E1 strengths, intrinsic dipole transition moment D0, octupole deformation. Comparison with shell model predictions, and with B(E2) in 142Ba. Systematics of B(E2) values for the first 2+ states for N=82-92, Ce, Ba, and Nd isotopes.
doi: 10.1103/PhysRevC.102.014324
2020MU17 Phys.Rev. C 102, 064318 (2020) C.Muller-Gatermann, A.Dewald, C.Fransen, M.Beckers, A.Blazhev, T.Braunroth, A.Goldkuhle, J.Jolie, L.Kornwebel, W.Reviol, F.von Spee, K.O.Zell Evolution of collectivity in 118Xe NUCLEAR REACTIONS 102Pd(19F, 2np)118Xe, E=73 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by recoil-distance Doppler-shift (RDDS) and differential decay-curve method (DDCM) using an array of 11 HPGe detectors and Cologne Coincidence Plunger at the Cologne FN-tandem accelerator. 118Xe; deduced levels, J, π, B(E2). Comparison with theoretical calculations using IBM1 with the ECQF Hamiltonian, and with previous experimental results. Systematics of B(E2) values for the first 2+ and 4+ states for 104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Sn, 108,110,112,114,116,118,120,122,124,126,128,130,132,134Te, 114,116,118,120,122,124,126,128,130,132,134,136Xe.
doi: 10.1103/PhysRevC.102.064318
2019GO13 Eur.Phys.J. A 55, 53 (2019) A.Goldkuhle, C.Fransen, A.Dewald, K.Arnswald, M.Bast, M.Beckers, A.Blazhev, T.Braunroth, G.Hackenberg, G.Hafner, J.Litzinger, J.Jolie, C.Muller-Gatermann, F.von Spee, N.Warr, D.Werner, K.O.Zell Lifetime measurement of excited states in 46Ti NUCLEAR REACTIONS 40Ca(9Be, 2pn)46Ti, E=33 MeV; measured Eγ, Iγ, γγ-coin; 46Ti; deduced yrast 2+1, 4+1, 6+1 states T1/2, upper T1/2 limit of the 8+1 state using Recoil Distance Doppler Shift (RDDS) method and γγ-coin using Differential Decay Curve Method (DDCM), γ-transition probabilities of the first yrast states.
doi: 10.1140/epja/i2019-12722-6
2019MU13 Nucl.Instrum.Methods Phys.Res. A920, 95 (2019) C.Muller-Gatermann, F.von Spee, A.Goasduff, D.Bazzacco, M.Beckers, T.Braunroth, A.Boso, P.Cocconi, G.de Angelis, A.Dewald, C.Fransen, A.Goldkuhle, A.Gottardo, A.Gozzelino, K.Hadynska-Klek, G.Jawroski, P.R.John, J.Jolie, S.M.Lenzi, J.Litzinger, R.Menegazzo, D.Mengoni, D.R.Napoli, F.Recchia, M.Siciliano, D.Testov, S.Thiel, J.J.Valiente-Dobon, K.O.Zell A new dedicated plunger device for the GALILEO γ-ray detector array NUCLEAR REACTIONS 154Sm(32S, 6n)180Pt, E=183 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, 6+ and 8+ levels T1/2.
doi: 10.1016/j.nima.2018.12.077
2018MU02 Phys.Rev. C 97, 024336 (2018) C.Muller-Gatermann, A.Dewald, C.Fransen, T.Braunroth, J.Jolie, J.Litzinger, J.M.Regis, F.von Spee, N.Warr, K.O.Zell, T.Grahn, P.T.Greenlees, K.Hauschild, U.Jakobsson, R.Julin, S.Juutinen, S.Ketelhut, P.Nieminen, M.Nyman, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, P.Petkov Low-lying electromagnetic transition strengths in 180Pt NUCLEAR REACTIONS 98Mo(86Kr, 4n), E=380 MeV from the K-130 cyclotron of University of Jyvaskyla; measured Eγ, Iγ, γγ-coin using JUROGAM II array, level half-lives by recoil-distance Doppler-shift method (RDDM) using DPUNS plunger, and differential decay-curve analysis. 168Yb(16O, 4n), E=88 MeV from FN tandem at University of Cologne; measured Eγ, Iγ, γγ(t), level half-lives by fast electronic timing technique using Horus cube spectrometer consisting of eight LaBr3(Ce) scintillators and eight HPGe detectors. 180Pt; deduced levels, J, π, B(E2). Comparison with predictions of interacting boson model (IBM-1) and general collective model (GCM) calculations.
doi: 10.1103/PhysRevC.97.024336
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