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NSR database version of April 24, 2024.

Search: Author = F.Pogliano

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2023LA08      Phys.Rev. C 108, 025804 (2023)

A.C.Larsen, G.M.Tveten, T.Renstrom, H.Utsunomiya, E.Algin, T.Ari-izumi, K.O.Ay, F.L.Bello Garrote, L.Crespo Campo, F.Furmyr, S.Goriely, A.Gorgen, M.Guttormsen, V.W.Ingeberg, B.V.Kheswa, I.K.B.Kullmann, T.Laplace, E.Lima, M.Markova, J.E.Midtbo, S.Miyamoto, A.H.Mjos, V.Modamio, M.Ozgur, F.Pogliano, S.Riemer-Sorensen, E.Sahin, S.Shen, S.Siem, A.Spyrou, M.Wiedeking

New experimental constraint on the ¹⁸⁵W(n, γ)¹⁸⁶W cross section

NUCLEAR REACTIONS ^182,183,184W(γ, n), E=6.5-13 MeV; measured In, En; deduced σ(E), γ-ray strength function (GSF). ¹⁸⁶W(α, α'γ), E=30 MeV; measured Eα, Iα, Eγ, Iγ, αγ-coin; deduced nuclear level density (NLD), γ-ray strength function (GSF). ¹⁸⁵W(n, γ), T=0.5-1.1 GK; calculated Maxwellian averaged σ(E) (MACS), reaction rate (stellar reactivity), compared with experimental results, and recommended σ in compilations by Bao et al. Comparison to other experimental data, TALYS calculations and KADONIS-1.0 data. Photoneutron reactions were measured with quasi-monochromatic photon beam at NewSubaru synchrotron radiation facility using 4π detector consisting of 20 ³He proportional counters. Experiment on inelastic α-scattering was performed at the Oslo Cyclotron Laboratory (OCL) using CACTUS NaI(Tl) scintillator γ-ray detector array, the Silicon Ring (SiRi) detector array and beam from MC-35 Scanditronix cyclotron.

doi: 10.1103/PhysRevC.108.025804
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2023PO02      Phys.Rev. C 107, 034605 (2023)

F.Pogliano, F.L.Bello Garrote, A.C.Larsen, H.C.Berg, D.Gjestvang, A.Gorgen, M.Guttormsen, V.W.Ingeberg, T.W.Johansen, K.L.Malatji, E.F.Matthews, M.Markova, J.E.Midtbo, V.Modamio, L.G.Pedersen, E.Sahin, S.Siem, T.G.Tornyi, A.S.Voyles

Observation of a candidate for the M1 scissors resonance in odd-odd ¹⁶⁶Ho

NUCLEAR REACTIONS ¹⁶³Dy(α, pγ), E=26 MeV; measured Eγ, Iγ, Ep, Ip, Eα, Iα, pγ-coin, pαγ-coin. ¹⁶⁶Ho; deduced nuclear level density (NLD), gamma strength function (GSF), resonance components of the GSF (Giant Dipole Re sonance, Pigmy Dipole Resonance, M1 scissors resonance), B(M1), parameters of s cissor resonance. Oslo method type of analysis. Systematics of scissor resonances is Ho, Sm, Dy, Er isotopes. Comparison to TALYS 1.95 calculations and other experimental data. Oslo Scintillator Array (OSCAR) of 30 cylindrical LaBr₃:Ce detectors and silicon ring (SiRi) consisting of 8 silicon-telescope modules at the Oslo Cyclotron Laboratory (OCL).

doi: 10.1103/PhysRevC.107.034605
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2023PO08      Phys.Rev. C 107, 064614 (2023)

F.Pogliano, A.C.Larsen, S.Goriely, L.Siess, M.Markova, A.Gorgen, J.Heines, V.W.Ingeberg, R.G.Kjus, J.E.L.Larsson, K.C.W.Li, E.M.Martinsen, G.J.Owens-Fryar, L.G.Pedersen, S.Siem, G.S.Torvund, A.Tsantiri

Experimentally constrained ^{165, 166}Ho(n, γ) rates and implications for the s process

NUCLEAR REACTIONS ¹⁶⁴Dy(α, pγ)¹⁶⁷Ho, E=26 MeV; measured Ep, Ip, Eγ, Iγ, pγ-coin. ¹⁶⁷Ho; deduced nuclear level density (NLD) and γ-ray strength function, resonance components of the GSF (Giant Dipole Resonance, Pigmy Dipole Resonance, M1 scissors resonance), upward scissor resonance strength. ^165,166Ho(n, γ), E=0.001-10 MeV; calculated σ(E) using obtained NLD and GSF (for ¹⁶⁷Ho from present work, for ¹⁶⁶Ho - from 2023PO02), Maxwellian-averaged σ(E) MACS (kT<105 keV). Oslo method type of analysis. Comparison with other experimental data and TALYS calculations. Comparison of obtained MACS with JINA REACLIB, BRUSLIB and KADONIS data. AGB nucleosynthesis predictions with STARERVOL code using obtained MACS. Oslo SCintillator ARray (OSCAR) and the Silicon Ring (SiRi) detector arrays at MC-35 Scanditronix cyclotron.

doi: 10.1103/PhysRevC.107.064614
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2023PO10      Phys.Rev. C 108, 025807 (2023)

F.Pogliano, A.C.Larsen

Impact of level densities and γ-strength functions on r-process simulations

NUCLEAR REACTIONS Sb(n, γ), at T=1.0 GK; evaluated neutron capture rates for N=70-130 Sb nuclei for 48 theoretical TALYS models, and comparison with calculated values with the HFB-17 mass model. ¹²⁸Xe(n, γ), T=0.5-1.5 GK; calculated neutron-capture rate predictions for different choices of γ-strength functions (GSF) while varying the nuclear level-density (NLD) models. A=30-180; Z=30-100; calculated differences between the highest and lowest predicted neutron-capture rate at T=1.0 GK for all the 48 combinations of NLD and GSF models using the FRDM-2012 and the HFB-17 mass models. A=80-250; calculated elemental abundances from the r-process for five trajectories after 1 Gy evolution using 48 neutron- capture rate models, and reaction rates in JINA REACLIB library.

doi: 10.1103/PhysRevC.108.025807
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2022PO05      Phys.Rev. C 106, 015804 (2022)

F.Pogliano, A.C.Larsen, F.L.Bello Garrote, M.M.Bjoroen, T.K.Eriksen, D.Gjestvang, A.Gorgen, M.Guttormsen, K.C.W.Li, M.Markova, E.F.Matthews, W.Paulsen, L.G.Pedersen, S.Siem, T.Storebakken, T.G.Tornyi, J.E.Vevik

Indirect measurement of the (n, γ) ¹²⁷Sb cross section

NUCLEAR REACTIONS ¹²⁴Sn(α, pγ), E=24 MeV; measured Eγ, Iγ, Ep, Ip, pγ-coin. ¹²⁷Sb; deduced gamma strength function (GSF), nuclear level densities (NLD). Oslo method analysis. ¹²⁶Sb(n, γ), E ∼ 30 keV; deduced Maxwellian-averaged σ using obtained GSF and NLD. Comparison to other experimental data and TALYS calculations. MACS for ¹²⁶Sb(n, γ) is compared with evaluated values from JINA REACLIB rates, TENDL-19, BRUSLIB, ENDF/B-VIII.0 and TALYS predictions . Oslo SCintillator ARray (OSCAR) and the Silicon Ring (SiRi) detector arrays at MC-35 Scanditronix cyclotron (OCL).

doi: 10.1103/PhysRevC.106.015804
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