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NSR database version of April 11, 2024.

Search: Author = H.K.Toft

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2017GU21      Phys.Rev. C 96, 024313 (2017)

M.Guttormsen, S.Goriely, A.C.Larsen, A.Gorgen, T.W.Hagen, T.Renstrom, S.Siem, N.U.H.Syed, G.Tagliente, H.K.Toft, H.Utsunomiya, A.V.Voinov, K.Wikan

Quasicontinuum γ decay of ^{91, 92}Zr: Benchmarking indirect (n, γ) cross section measurements for the s process

NUCLEAR REACTIONS ⁹²Zr(p, d), E=28 MeV; ⁹²Zr(p, p'), E=17 MeV; measured E(p), I(p), E(d), I(d), Eγ, Iγ, (particle)γ-coin, γ-ray multiplicity measured using SiRi array of silicon telescopes for charged particles and CACTUS array of NaI(Tl) detectors for γ rays at Oslo Cyclotron laboratory (OCL). ^91,92Zr; deduced levels, J, π, nuclear level densities (NLDs), E1 and M1 γ-ray strength functions (γSF), l=0 resonances. ^90,91Zr(n, γ), E=0.001-1 MeV and kT<0.11 MeV; deduced σ(E) and Maxwellian-averaged cross sections using TALYS code on the basis of the experimental NLDs and γSF in the present work, and compared with available experimental data.

doi: 10.1103/PhysRevC.96.024313
Citations: PlumX Metrics

2014ER04      Phys.Rev. C 90, 044311 (2014)

T.K.Eriksen, H.T.Nyhus, M.Guttormsen, A.Gorgen, A.C.Larsen, T.Renstrom, I.E.Ruud, S.Siem, H.K.Toft, G.M.Tveten, J.N.Wilson

Pygmy resonance and low-energy enhancement in the γ-ray strength functions of Pd isotopes

NUCLEAR REACTIONS ^106,108Pd(³He, ³He'), (³He, α), E=38 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using SiRi particle telescope and CACTUS γ-detector array at Oslo cyclotron facility. ^{105,106,107,108}Pd; deduced level densities, γ-ray strength functions, pygmy dipole resonances (PDR) at E(-γ)=8 MeV, low-energy enhancement of the strength function for ¹⁰⁵Pd as compared to the low-energy tail of the giant dipole resonance (GDR), and neutron number dependency of the PDR strength. Comparison with results from (γ, n) data.

doi: 10.1103/PhysRevC.90.044311
Citations: PlumX Metrics

2012LA02      Phys.Rev. C 85, 014320 (2012)

A.C.Larsen, S.Goriely, A.Burger, M.Guttormsen, A.Gorgen, S.Harissopulos, M.Kmiecik, T.Konstantinopoulos, A.Lagoyannis, T.Lonnroth, K.Mazurek, M.Norrby, H.T.Nyhus, G.Perdikakis, A.Schiller, S.Siem, A.Spyrou, N.U.H.Syed, H.K.Toft, G.M.Tveten, A.Voinov

Primary γ-ray spectra in ⁴⁴Ti of astrophysical interest

NUCLEAR REACTIONS ⁴⁶Ti(p, t), E=32 MeV; measured particle spectra, Eγ, Iγ, γγ-, (particle)γ-coin, primary continuum γ spectra ⁴⁴Ti; deduced levels, J, π, radiative strength function, level density, average radiative width by applying the Oslo method. ^46,48Ti; deduced levels, J, π. ⁴⁰Ca(α, γ)⁴⁴Ti; analyzed cross sections of astrophysical interest using TALYS code. Comparison with generalized Lorentzian (GLO) and previous studies.

doi: 10.1103/PhysRevC.85.014320
Citations: PlumX Metrics

2012NY01      Phys.Rev. C 85, 014323 (2012)

H.T.Nyhus, S.Siem, M.Guttormsen, A.C.Larsen, A.Burger, N.U.H.Syed, H.K.Toft, G.M.Tveten, A.Voinov

Level density and thermodynamic properties of dysprosium isotopes

NUCLEAR REACTIONS ¹⁶⁴Dy(³He, α), (³He, ³He'), E=38 MeV; measured particle spectra, Eγ, Iγ, γγ-coin, primary continuum γ spectra. ¹⁶³Dy, ¹⁶⁴Dy; deduced level density, γ-ray transmission coefficient, micro-canonical entropies, average temperature, heat capacity. Oslo method. Comparison with Fermi gas model calculations.

doi: 10.1103/PhysRevC.85.014323
Citations: PlumX Metrics

2012WI03      Phys.Rev. C 85, 034607 (2012)

J.N.Wilson, F.Gunsing, L.A.Bernstein, A.Burger, A.Gorgen, M.Guttormsen, A.-C.Larsen, P.Mansouri, T.Renstrom, S.J.Rose, A.Semchenkov, S.Siem, N.U.H.Syed, H.K.Toft, M.Wiedeking, T.Wiborg-Hagen

Indirect (n, γ) cross sections of thorium cycle nuclei using the surrogate method

NUCLEAR REACTIONS ²³²Th(d, p)²³³Th, E=12 MeV; ²³²Th(³He, t)²³²Pa, ²³²Th(³He, α)²³¹Th, E=24 MeV; measured energy loss, E(particle), I(particle), Eγ, Iγ, γ(fragment)-coin using CACTUS γ-detector array, and Silicon Ring charged-particle detector at Oslo Cyclotron Laboratory; deduced γ decay probabilities. ^230,232Th, ²³¹Pa(n, γ), E<1.4 MeV; deduced cross sections using surrogate ratio method. Comparison with evaluated data libraries. Optical model calculations of compound nucleus formation cross sections, and weighting function technique.

doi: 10.1103/PhysRevC.85.034607
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23165.

2011GU02      Phys.Rev. C 83, 014312 (2011)

M.Guttormsen, A.C.Larsen, A.Burger, A.Gorgen, S.Harissopulos, M.Kmiecik, T.Konstantinopoulos, M.Krticka, A.Lagoyannis, T.Lonnroth, K.Mazurek, M.Norrby, H.T.Nyhus, G.Perdikakis, A.Schiller, S.Siem, A.Spyrou, N.U.H.Syed, H.K.Toft, G.M.Tveten, A.Voinov

Fermi?s golden rule applied to the γ decay in the quasicontinuum of ⁴⁶Ti

NUCLEAR REACTIONS ⁴⁶Ti(p, p'), E=15 MeV; measured Ep, Ip, pγ-coin, excitation functions; deduced level density and radiative strength function (RSF) using Oslo method. Fermi?s golden rule employed to disentangle the γ strength and level density in the γ decay between states in the quasicontinuum of ⁴⁶Ti.

doi: 10.1103/PhysRevC.83.014312
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2011LA05      Phys.Rev. C 83, 034315 (2011); Erratum Phys.Rev. C 97, 094901 (2018)

A.C.Larsen, M.Guttormsen, M.Krticka, E.Betak, A.Burger, A.Gorgen, H.T.Nyhus, J.Rekstad, A.Schiller, S.Siem, H.K.Toft, G.M.Tveten, A.V.Voinov, K.Wikan

Analysis of possible systematic errors in the Oslo method

NUCLEAR REACTIONS ⁵⁰V, ¹¹⁷Sn, ^160,164Dy(³He, α), E not given; ⁵⁰V, ^160,162,164Dy(³He, ³He'), E not given; ⁴⁶Ti(p, p'), E=15-32 MeV; analyzed previous experimental data and simulated data for particle and γ spectra, (particle)γ-coin, γ-ray transmission coefficients and strength functions, level densities. ^56,57,58Fe, ^96,97,98Mo(³He, ³He'); analyzed first generation matrix, parity distributions. Analysis of systematic errors in Oslo method for the simultaneous extraction of the level density and γ-ray transmission coefficient from (particle)γ-coincidence data.

doi: 10.1103/PhysRevC.83.034315
Citations: PlumX Metrics

2011TO03      Phys.Rev. C 83, 044320 (2011)

H.K.Toft, A.C.Larsen, A.Burger, M.Guttormsen, A.Gorgen, H.T.Nyhus, T.Renstrom, S.Siem, G.M.Tveten, A.Voinov

Evolution of the pygmy dipole resonance in Sn isotopes

NUCLEAR REACTIONS ¹²²Sn(³He, ³He'), (³He, α), E=34 MeV; measured Eγ, Iγ, (particle)γ-coin, continuum γ spectra using Oslo method. ^121,122Sn; deduced γ-ray strength functions, level densities, pygmy resonances. Comparison with experimental data for ^{113,115,116,117,118,119,120}Sn, and model calculations.

doi: 10.1103/PhysRevC.83.044320
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1920.

2010TO06      Phys.Rev. C 81, 064311 (2010)

H.K.Toft, A.C.Larsen, U.Agvaanluvsan, A.Burger, M.Guttormsen, G.E.Mitchell, H.T.Nyhus, A.Schiller, S.Siem, N.U.H.Syed, A.Voinov

Level densities and γ-ray strength functions in Sn isotopes

NUCLEAR REACTIONS ¹¹⁹Sn(³He, ³He), (³He, α), E=38 MeV; measured Eγ, particle-γ coin. ^118,119Sn; deduced γ-ray strength functions, level densities, parity asymmetry functions, collective enhancement factors, and spin distributions. Oslo method. Combinatorial BCS model.

doi: 10.1103/PhysRevC.81.064311
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1852.

2009EK01      Phys.Rev. C 80, 054302 (2009)

A.Ekstrom, J.Cederkall, D.D.DiJulio, C.Fahlander, M.Hjorth-Jensen, A.Blazhev, B.Bruyneel, P.A.Butler, T.Davinson, J.Eberth, C.Fransen, K.Geibel, H.Hess, O.Ivanov, J.Iwanicki, O.Kester, J.Kownacki, U.Koster, B.A.Marsh, P.Reiter, M.Scheck, B.Siebeck, S.Siem, I.Stefanescu, H.K.Toft, G.M.Tveten, J.Van de Walle, D.Voulot, N.Warr, D.Weisshaar, F.Wenander, K.Wrzosek, M.Zielinska

Electric quadrupole moments of the 2⁺₁ states in ^{100, 102, 104}Cd

NUCLEAR REACTIONS ¹⁰⁹Ag(¹⁰⁰Cd, ¹⁰⁰Cd'), E=287.0 MeV; ⁶⁴Zn, ¹⁰⁹Ag(¹⁰²Cd, ¹⁰²Cd'), E=292.7 MeV; ⁶⁴Zn, ¹⁰⁹Ag(¹⁰⁴Cd, ¹⁰⁴Cd'), E=298.7 MeV; measured Eγ, Iγ, γ(particle)-coin, and γ-ray yields using REX-ISOLDE facility. ⁶⁴Zn, ^100,102,104Cd, ¹⁰⁹Ag; deduced levels, J, π, E2 matrix elements, electric quadrupole moments. Comparison with shell model calculations.

NUCLEAR MOMENTS ^100,102,104Cd; measured electric quadrupole moments of first 2+ states using reorientation method in Coulomb excitation. Comparison with shell model calculations.

doi: 10.1103/PhysRevC.80.054302
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2009NY01      Acta Phys.Pol. B40, 593 (2009)

H.T.Nyhus, S.Siem, M.Guttormsen, A.C.Larsen, A.Burger, N.U.H.Syed, H.K.Toft, G.M.Tveten, A.Voinov

Level Densities, Thermodynamics and γ-Ray Strength Functions in ^{163, 164}Dy

NUCLEAR REACTIONS ^163,164Dy(³He, α), (³He, ³He'), E not given;measured Eγ, Iγ, Eα, Iα; deduced level densities, γ-ray strength functions, pygmy resonance.