NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = J.E.Midtbo Found 14 matches. 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
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
2022BE24 Phys.Lett. B 834, 137479 (2022) F.L.Bello Garrote, A.Lopez-Martens, A.C.Larsen, I.Deloncle, S.Peru, F.Zeiser, P.T.Greenlees, B.V.Kheswa, K.Auranen, D.L.Bleuel, D.M.Cox, L.Crespo Campo, F.Giacoppo, A.Gorgen, T.Grahn, M.Guttormsen, T.W.Hagen, L.Harkness-Brennan, K.Hauschild, G.Henning, R.-D.Herzberg, R.Julin, S.Juutinen, T.A.Laplace, M.Leino, J.E.Midtbo, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, T.Renstrom, K.Rezynkina, M.Sandzelius, J.Saren, C.Scholey, S.Siem, J.Sorri, S.Stolze, J.Uusitalo Experimental observation of the M1 scissors mode in 254No NUCLEAR REACTIONS 208Pb(48Ca, 2n)254No, E=220, 222 MeV; 154Sm(48Ca, 6n)196Pb, E not given; measured Eγ, Iγ, prompt and recoil-gated γ-ray singles spectra, polarization asymmetries of discreet γ rays in 254No and 196Pb; deduced experimental γ-ray yield and compared with simulated γ spectra using RAINIER code, γ-strength function (γSF), B(M1), B(E1), widths, scissors mode of excitation in 254No. Comparison with BSFG + E1SLO + M1SLO model combination; tested parameters for the GDR and the spin-flip resonance by HFB calculations. Comparison of B(M1) strength with QRPA calculations.
doi: 10.1016/j.physletb.2022.137479
2022GU17 Phys.Rev. C 106, 034314 (2022) M.Guttormsen, K.O.Ay, M.Ozgur, E.Algin, A.C.Larsen, F.L.Bello Garrote, H.C.Berg, L.Crespo Campo, T.Dahl-Jacobsen, F.W.Furmyr, D.Gjestvang, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, I.K.B.Kullmann, M.Klintefjord, M.Markova, J.E.Midtbo, V.Modamio, W.Paulsen, L.G.Pedersen, T.Renstrom, E.Sahin, S.Siem, G.M.Tveten, M.Wiedeking Evolution of the γ-ray strength function in neodymium isotopes NUCLEAR REACTIONS 142,144,146,148,150Nd(p, p'γ), (d, pγ), E(p)=16.0 MeV, E(d)=13.5 MeV; measured Eγ, Iγ, E(p), pγ-coin using SiRi array of 64 ΔE-E particle telescopes, and OSCAR array of 15 to 30 LaBr3(Ce) scintillators for γ detection at the Oslo Cyclotron Laboratory. 142,144,145,146,147,148,149,150,151Nd; deduced energies, widths and cross sections of giant dipole resonances (GDR), pygmy-dipole resonances (PDR), scissors mode (SM) resonances, low-energy enhancement (LEE) structures, average probability for populating levels, γ strength functions as function of Eγ, (γSF(Eγ)) and nuclear level densities (NLD) using the OSLO method, integrated LEE and SM strengths B(M1), cross over from spherical to deformed shapes for neodymium isotopes.
doi: 10.1103/PhysRevC.106.034314
2021GU12 Phys.Lett. B 816, 136206 (2021) M.Guttormsen, Y.Alhassid, W.Ryssens, K.O.Ay, M.Ozgur, E.Algin, A.C.Larsen, F.L.Bello Garrote, L.Crespo Campo, T.Dahl-Jacobsen, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, M.Klintefjord, J.E.Midtbo, V.Modamio, T.Renstrom, E.Sahin, S.Siem, G.M.Tveten, F.Zeiser Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes NUCLEAR REACTIONS 142,144,146,148,150Nd(p, X), E=16 MeV; 142,144,146,148,150Nd(α, X), E=13.5 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, nuclear level densities, quadrupole deformation parameters. Comparison with the shell model Monte Carlo (SMMC) calculations.
doi: 10.1016/j.physletb.2021.136206
2019KU11 Phys.Rev. C 99, 065806 (2019) I.K.B.Kullmann, A.C.Larsen, T.Renstrom, K.S.Beckmann, F.L.Bello Garrote, L.Crespo Campo, A.Gorgen, M.Guttormsen, J.E.Midtbo, E.Sahin, S.Siem, G.M.Tveten, F.Zeiser First experimental constraint on the 191Os(n, γ) reaction rate relevant to s-process nucleosynthesis NUCLEAR REACTIONS 192Os(α, α'), E=30 MeV; measured Eα, Iα, Eγ, Iγ, and αγ-coin using the CACTUS array for γ detection and the SiRi array for charged particle detection at the Oslo Cyclotron Laboratory. 192Os; deduced nuclear level density and γ-ray strength function. 191Os(n, γ), E=0-100 keV; calculated Maxwellian-averaged σ(E) using TALYS code, and compared with KADoNiS database and evaluated libraries such as TENDL-2017, ENDF/B-VII.0, and JEFF. Systematics of γ-strength functions, nuclear level densities and average radiative widths for 187,188,189,190,192,193Os, 181,183,184,185,187W, 186,188Re, 192,193,194Ir.
doi: 10.1103/PhysRevC.99.065806
2019LI35 Phys.Rev. C 100, 024624 (2019) S.N.Liddick, A.C.Larsen, M.Guttormsen, A.Spyrou, B.P.Crider, F.Naqvi, J.E.Midtbo, F.L.Bello Garrote, D.L.Bleuel, L.Crespo Campo, A.Couture, A.C.Dombos, F.Giacoppo, A.Gorgen, K.Hadynska-Klek, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, R.Lewis, S.Mosby, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, G.M.Tveten, M.Wiedeking, F.Zeiser Benchmarking the extraction of statistical neutron capture cross sections on short-lived nuclei for applications using the β-Oslo method RADIOACTIVITY 51Sc(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon]; measured Eβ, Iβ, Eγ, Iγ, βγ-coin; deduced level density, γ-strength function. Measurement was performed at NSCL using the Summing NaI(Tl) detector SuN, used as a TAS. NUCLEAR REACTIONS 50Ti(d, p)51Ti, E=12.5 MeV; measured Ep, Ip, Eγ, Iγ, γp-coin; deduced nuclear level density (NLD), γ strength function (γSF). Measurement was performed at the Oslo Cyclotron Laboratory, Sweden using the CACTUS NaI scintillator array.
doi: 10.1103/PhysRevC.100.024624
2019ZE03 Phys.Rev. C 100, 024305 (2019) F.Zeiser, G.M.Tveten, G.Potel, A.C.Larsen, M.Guttormsen, T.A.Laplace, S.Siem, D.L.Bleuel, B.L.Goldblum, L.A.Bernstein, F.L.Bello Garrote, L.Crespo Campo, T.K.Eriksen, A.Gorgen, K.Hadynska-Klek, V.W.Ingeberg, J.E.Midtbo, E.Sahin, T.Tornyi, A.Voinov, M.Wiedeking, J.Wilson Restricted spin-range correction in the Oslo method: The example of nuclear level density and γ-ray strength function from 239Pu (d, pγ)240Pu NUCLEAR REACTIONS 239Pu(d, p)240Pu, E=12 MeV; measured Eγ, Iγ, Ep, Ip, γp-coin using SiRi particle telescopes and CACTUS γ-ray detector array at the Oslo Cyclotron Laboratory; deduced nuclear level density, γ-ray strength function using Oslo method. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.100.024305
2018LA07 Phys.Rev. C 97, 054329 (2018) A.C.Larsen, J.E.Midtbo, M.Guttormsen, T.Renstrom, S.N.Liddick, A.Spyrou, S.Karampagia, B.A.Brown, O.Achakovskiy, S.Kamerdzhiev, D.L.Bleuel, A.Couture, L.Crespo Campo, B.P.Crider, A.C.Dombos, R.Lewis, S.Mosby, F.Naqvi, G.Perdikakis, C.J.Prokop, S.J.Quinn, S.Siem Enhanced low-energy γ-decay strength of 70Ni and its robustness within the shell model RADIOACTIVITY 70Co(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon followed by fragment separation using A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, summed γ energies, β-γ-coin using double-sided silicon strip detector (DSSD) for electrons placed in the center of the Summing NaI (SuN) total absorption spectrometer for γ radiation. 70Ni; deduced nuclear level density (NLD) and γ-strength function (γSF) using β-Oslo method. Comparison with previous experimental results, and with HFB+c calculations. NUCLEAR STRUCTURE 70Ni; calculated levels, J, π, B(E2), level densities, γSF, summed γSF, and M1 γ strengths for A=56-76 Ni isotopes. Quasiparticle time-blocking approximation and large-scale shell-model calculations with CA48MH1G and JUN45 interactions. Comparison with experimental results.
doi: 10.1103/PhysRevC.97.054329
2018MI22 Phys.Rev. C 98, 064321 (2018) J.E.Midtbo, A.C.Larsen, T.Renstrom, F.L.Bello Garrote, E.Lima Consolidating the concept of low-energy magnetic dipole decay radiation NUCLEAR STRUCTURE 60,61,62,63,64,65,66,67,68Ga, 69,70,71,72,73,74,75,76,77,78,79,80Ga, 59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75Ni, 60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76Cu, 60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78Zn, 60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81Ge, 61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81As, 78,79,80,81,82Se, 21,22,23,24,25,26,27,28,29,30,31,32,33Al, 16,17,18,19,20,21,22,23,24,25,26O, 18,19,20,21,22,23,24,25,26,27,28F, 18,19,20,21,22,23,24,25,26,27,28,29,30Ne, 19,20,21,22,23,24,25,26,27,28,29,30,31Na, 20,21,22,23,24,25,26,27,28,29,30,31,32Mg, 22,23,24,25,26,27,28,29,30,31,32,33,34Si, 23,24,25,26,27,28,29,30,31,32,33,34,35P, 24,25,26,27,28,29,30,31,32,33,34,35,36S, 25,26,27,28,29,30,31,32,33,34,35,36,37Cl, 26,27,28,29,30,31,32,33,34,35,36,37,38Ar, 44Sc, 56Fe, 37K; calculated M1 γ-ray strength functions for 283 nuclei, low-energy enhancements (LEE), total dipole (E1 and M1) strength for 44Sc and 29Si using large-scale shell model. Comparison with experimental data from the Oslo method.
doi: 10.1103/PhysRevC.98.064321
2018RE15 Phys.Rev. C 98, 054310 (2018) T.Renstrom, H.Utsunomiya, H.T.Nyhus, A.C.Larsen, M.Guttormsen, G.M.Tveten, D.M.Filipescu, I.Gheorghe, S.Goriely, S.Hilaire, Y.-W.Lui, J.E.Midtbo, S.Peru, T.Shima, S.Siem, O.Tesileanu Verification of detailed balance for γ absorption and emission in Dy isotopes NUCLEAR REACTIONS 162,163Dy(γ, n), E=6.4-13.5 MeV laser Compton backscattered γ-ray beam; measured neutron spectra, and σ(E) using 4π 3He proportional counter array for neutron detection at the NewSUBARU synchrotronic radiation facility; deduced renormalized nuclear level densities (NLD), γ-strength functions (γSF). 160,161,162,163,164Dy; deduced γ strength functions, nuclear level densities, E1 γ strength function, and M1 scissors resonance σ, centroids, widths, B(M1). 159,160,161,162,163Dy(n, γ), E=0.001-1 MeV; calculated σ(E) with TALYS-1.8 code, and compared to previous experimental data. 160,161,162,163,164Dy(3He, α), (3He, 3He'), E*<8 MeV; analyzed previous experimental data; deduced level densities.
doi: 10.1103/PhysRevC.98.054310
2018UT03 Phys.Rev. C 98, 054619 (2018) H.Utsunomiya, T.Renstrom, G.M.Tveten, S.Goriely, S.Katayama, T.Ari-izumi, D.Takenaka, D.Symochko, B.V.Kheswa, V.W.Ingeberg, T.Glodariu, Y.-W.Lui, S.Miyamoto, A.C.Larsen, J.E.Midtbo, A.Gorgen, S.Siem, L.Crespo Campo, M.Guttormsen, S.Hilaire, S.Peru, A.J.Koning Photoneutron cross sections for Ni isotopes: Toward understanding (n, γ) cross sections relevant to weak s-process nucleosynthesis NUCLEAR REACTIONS 58,60,61,64Ni(γ, n), E=8.00-22.02 MeV; measured E(n), I(n), σ(E) using 3He proportional counters for neutrons and LaBr3(Ce) detector for γ-flux at NewSUBARU synchrotron radiation facility; deduced γ-ray strength functions (γSF); compared σ(E) with previous experimental data, and with TALYS predictions. 58,60,63,64(n, γ), E=0.01-10 MeV; calculated radiative σ(E) and Maxwellian averaged σ (MACS) in terms of the experimentally constrained γ-ray strength functions from the Hartree-Fock-Bogolyubov plus quasiparticle-random-phase approximation (HFB+QRPA) based on the Gogny D1M interaction for E1 and M1 components, supplemented with the M1 upbend. Relevance to the s-process nucleosynthesis, and radioactive nuclei at the s-process branching points.
doi: 10.1103/PhysRevC.98.054619
2017KH08 Phys.Rev. C 95, 045805 (2017) B.V.Kheswa, M.Wiedeking, J.A.Brown, A.C.Larsen, S.Goriely, M.Guttormsen, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, T.K.Eriksen, F.Giacoppo, A.Gorgen, B.L.Goldblum, T.W.Hagen, P.E.Koehler, M.Klintefjord, K.L.Malatji, J.E.Midtbo, H.T.Nyhus, P.Papka, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.G.Tornyi 137, 138, 139La (n, γ) cross sections constrained with statistical decay properties of 138, 139, 140La nuclei NUCLEAR REACTIONS 139La(3He, α), (3He, 3He'), E=38 MeV; 139La(d, p), E=13.5 MeV; measured α, 3He and proton spectra, Eγ, Iγ, αγ-, (3He)γ-, and pγ-coin using SiRi array for particles and CACTUS array for γ rays. 138,139,140La; deduced nuclear level densities (NLDs)and γ-ray strength functions (γSF). Comparison with previous experimental data, and with microscopic calculations using HFB+Comb, Fermi gas (BSFG1+CT) and BSFG2+CT models. 137,138,139La(n, γ), E=0.001-1 MeV; calculated σ(E) with the TALYS reaction code using the measured NLDs and γSFs as inputs, and compared to available experimental data.
doi: 10.1103/PhysRevC.95.045805
2017LA06 J.Phys.(London) G44, 064005 (2017) A.C.Larsen, M.Guttormsen, N.Blasi, A.Bracco, F.Camera, L.Crespo Campo, T.K.Eriksen, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, S.Leoni, J.E.Midtbo, B.Million, H.T.Nyhus, T.Renstrom, S.J.Rose, I.E.Ruud, S.Siem, T.G.Tornyi, G.M.Tveten, A.V.Voinov, M.Wiedeking, F.Zeiser Low-energy enhancement and fluctuations of γ-ray strength functions in 56, 57Fe: test of the Brink-Axel hypothesis NUCLEAR REACTIONS 56,57Fe(p, pγ), E=16 MeV; measured reaction products, Ep, Ip, Eγ, Iγ; deduced level densities, γ-ray strength functions.
doi: 10.1088/1361-6471/aa644a
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