Vetle Wegner Ingeberg

Postdoctoral Fellow - Nuclear and Energy Physics

Senior Engineer - Nuclear and Energy Physics

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Email v.w.ingeberg@fys.uio.no

Room V103

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Visiting address Sem Sælands vei 24 Fysikkbygningen 0371 OSLO

Postal address Postboks 1048 Blindern 0316 Oslo

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Research interest

My main research interest is in nuclear astrophysics and the formation of the elements. Specifically I'm interested in how our understanding of these processes can be expanded by having accurate experimental nuclear data. In addition, I'm also very interested in various technical aspects of nuclear physics experiments and how raw data are collected and processed.

Magagula, S.P.E.; Malatji, Kgashane Leroy; Wiedeking, M.; Pellegri, L; Beckmann, Kristine Sønstevold & Bello Garrote, Frank Leonel [Show all 17 contributors for this article] (2023). Investigating the strength of the scissors mode in 151Sm. Journal of Physics: Conference Series (JPCS). ISSN 1742-6588. doi: 10.1088/1742-6596/2586/1/012070. Full text in Research Archive
Tveten, Gry Merete; Utsunomiya, H.; Larsen, Ann-Cecilie; Algin, E.; Ari-Izumi, T. & Ay, Kursad Osman [Show all 31 contributors for this article] (2023). New experimental constraint on the W 185 (n,γ) W 186 cross section. Physical Review C. ISSN 2469-9985. 108(2). doi: 10.1103/PhysRevC.108.025804. Full text in Research Archive
Pogliano, Francesco; Larsen, Ann-Cecilie; Goriely, Stéphane; Siess, Lionel; Markova, Maria & Görgen, Andreas [Show all 17 contributors for this article] (2023). Experimentally constrained Ho 165,166 (n,γ) rates and implications for the s process. Physical Review C. ISSN 2469-9985. 107(6). doi: 10.1103/PhysRevC.107.064614. Full text in Research Archive
Pogliano, Francesco; Bello Garrote, Frank Leonel; Larsen, Ann-Cecilie; Berg, Hannah Christine; Gjestvang, Dorthea & Görgen, Andreas [Show all 19 contributors for this article] (2023). Observation of a candidate for the M1 scissors resonance in odd-odd Ho 166. Physical Review C. ISSN 2469-9985. 107(3). doi: 10.1103/PhysRevC.107.034605. Show summary
The γ -strength function and the nuclear level density for the odd-odd, rare-earth nucleus 166 Ho have been extracted from 163 Dy(α, pγ ) 166 Ho data using the Oslo method. A structure at ≈3 MeV in the γ -strength function is interpreted as the M1 scissors resonance. By employing three different methods we find that its strength depends rather strongly on the modeling of the E 1 strength, while its centroid does not. The 166 Ho scissors resonance parameters are consistent with previous results on other rare-earth nuclei.
Ingeberg, Vetle Wegner; Jones, P.; Msebi, L.; Siem, Sunniva; Wiedeking, M. & Avaa, A.A. [Show all 12 contributors for this article] (2022). Nuclear level density and γ-ray strength function of Ni 63. Physical Review C. ISSN 2469-9985. 106(5). doi: 10.1103/PhysRevC.106.054315. Full text in Research Archive
Guttormsen, Magne Sveen; Ay, Kursad Osman; Ozgur, Mustafa; Algin, Emel; Larsen, Ann-Cecilie & Bello Garrote, Frank Leonel [Show all 25 contributors for this article] (2022). Evolution of the γ -ray strength function in neodymium isotopes. Physical Review C. ISSN 2469-9985. 106(3). doi: 10.1103/PhysRevC.106.034314. Full text in Research Archive
Msebi, L.; Ingeberg, Vetle Wegner; Jones, P.; Sharpey-Schafer, J.F.; Avaa, A.A. & Bucher, T.D. [Show all 19 contributors for this article] (2022). A fast-timing array of 2” x 2” LaBr<inf>3</inf>:Ce detectors for lifetime measurements of excited nuclear states. Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment. ISSN 0168-9002. 1026. doi: 10.1016/j.nima.2021.166195.
Guttormsen, Magne Sveen; Alhassid, Yoram; Ryssens, Wouter; Ay, K.o.; Ozgur, Mustafa & Algin, Emel [Show all 21 contributors for this article] (2021). Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes. Physics Letters B. ISSN 0370-2693. 816. doi: 10.1016/j.physletb.2021.136206. Full text in Research Archive
Malatji, Kgashane Leroy; Beckmann, Kristine Sønstevold; Wiedeking, Mathis; Siem, Sunniva; Goriely, Stephane & Larsen, Ann-Cecilie [Show all 21 contributors for this article] (2021). Statistical properties of the well deformed 153,155Sm nuclei and the scissors resonance. Physical Review C. ISSN 2469-9985. 103(1). doi: 10.1103/PhysRevC.103.014309. Full text in Research Archive
Zeiser, Fabio; Tveten, Gry Merete; Bello Garrote, Frank Leonel; Guttormsen, Magne Sveen; Larsen, Ann-Cecilie & Ingeberg, Vetle Wegner [Show all 8 contributors for this article] (2021). The gamma-ray energy response of the Oslo Scintillator Array OSCAR. Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment. ISSN 0168-9002. 985. doi: 10.1016/j.nima.2020.164678. Full text in Research Archive
Ingeberg, Vetle Wegner; Siem, Sunniva; Wiedeking, Mathis; Sieja, Kamila; Bleuel, D.l. & Brits, C.P. [Show all 29 contributors for this article] (2020). First application of the Oslo method in inverse kinematics. European Physical Journal A. ISSN 1434-6001. 56. doi: 10.1140/epja/s10050-020-00070-7. Full text in Research Archive Show summary
The γ-ray strength function (SF) and nuclear level density (NLD) have been extracted for the first time from inverse kinematic reactions with the Oslo method. This novel technique allows measurements of these properties across a wide range of previously inaccessible nuclei. Proton–γ coincidence events from the d(⁸⁷Kr,p)⁸⁶Kr reaction were measured at iThemba LABS and the γSF and NLD in ⁸⁶Kr was obtained. The low-energy region of the γSF is compared to shell-model calculations, which suggest this region to be dominated by M1 strength. The γSF and NLD are used as input parameters to Hauser–Feshbach calculations to constrain (n,γ) cross sections of nuclei using the TALYS reaction code. These results are compared to ⁸⁶Kr(n,γ) data from direct measurements.
Brits, C.P.; Malatji, Kgashane L.; Wiedeking, M.; Kheswa, BV; Goriely, S. & Bello Garrote, Frank Leonel [Show all 26 contributors for this article] (2019). Nuclear level densities and γ-ray strength functions of 180,181,182Ta. Physical Review C. ISSN 2469-9985. 99(5). doi: 10.1103/PhysRevC.99.054330. Full text in Research Archive
Zeiser, Fabio; Tveten, Gry Merete; Potel, Gregory; Larsen, Ann-Cecilie; Guttormsen, Magne Sveen & Laplace, Thibault A. [Show all 22 contributors for this article] (2019). Restricted spin-range correction in the Oslo method: The example of nuclear level density and γ-ray strength function from 239Pu(d, pγ) 240Pu. Physical Review C. ISSN 2469-9985. 100:024305(2), p. 1–9. doi: 10.1103/PhysRevC.100.024305. Full text in Research Archive
Liddick, Sean N.; Larsen, Ann-Cecilie; Guttormsen, Magne Sveen; Spyrou, Artemis; Crider, Benjamin P. & Naqvi, Farheen [Show all 29 contributors for this article] (2019). Benchmarking the extraction of statistical neutron capture cross sections on short-lived nuclei for applications using the β-Oslo method . Physical Review C. ISSN 2469-9985. 100:024624(2), p. 1–12. doi: 10.1103/PhysRevC.100.024624. Full text in Research Archive
Utsunomiya, Hiroaki; Renstrøm, Therese; Tveten, Gry Merete; Goriely, Stéphane; Ari-izumi, Takashi & Ingeberg, Vetle Wegner [Show all 12 contributors for this article] (2019). γ-ray strength function for barium isotopes. Physical Review C. ISSN 2469-9985. 100(3), p. 034605-1–034605-7. doi: 10.1103/PhysRevC.100.034605. Full text in Research Archive
Malatji, Kgashane Leroy; Wiedeking, Mathis; Goriely, Stephane; Brits, Christiaan Petrus; Kheswa, Bonginkosi Vincent & Bello Garrote, Frank Leonel [Show all 21 contributors for this article] (2019). Re-estimation of 180Ta nucleosynthesis in light of newly constrained reaction rates. Physics Letters B. ISSN 0370-2693. 791, p. 403–408. doi: 10.1016/j.physletb.2019.03.013. Full text in Research Archive
Wilson, Joshua N.; Lebois, Matthieu; Qi, Liqiang; Amador-Celdran, Pedro; Bleuel, Darren L. & Briz, José A. [Show all 49 contributors for this article] (2018). Studies of fission fragment yields via high-resolution γ-ray spectroscopy. The European Physical Journal Conferences. ISSN 2101-6275. 169, p. 1–8. doi: 10.1051/epjconf/201816900030. Full text in Research Archive
Utsunomiya, Hiroaki; Renstrøm, Therese; Tveten, Gry Merete; Goriely, Stéphane; Katayama, Seitaro & Ari-Izumi, Takashi [Show all 22 contributors for this article] (2018). Photoneutron cross sections for Ni isotopes: Toward understanding (n, γ ) cross sections relevant to weak s-process nucleosynthesis. Physical Review C. ISSN 2469-9985. 98(5), p. 1–9. doi: 10.1103/PhysRevC.98.054619. Full text in Research Archive Show summary
Photoneutron cross sections were measured for 58Ni, 60Ni, 61Ni, and 64Ni at energies between the one-neutron and two-neutron thresholds using quasimonochromatic γ -ray beams produced in laser Compton scattering at the NewSUBARU synchrotron radiation facility. These photoneutron data are used to extract the γ -ray strength function above the neutron threshold, complementing the information obtained by the Oslo method below the threshold. We discuss radiative neutron-capture cross sections and the Maxwellian-averaged cross sections for Ni isotopes including 63Ni, a branching point nucleus along the weak s-process path. The cross sections are calculated with the experimentally constrained γ-ray strength functions from the Hartree-Fock-Bogolyubov plus quasiparticle–random-phase approximation based on the Gogny D1M interaction for both E1 and M1 components and supplemented with the M1 upbend.
Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Midtbø, Jørgen E.; Crespo Campo, Lucia; Görgen, Andreas & Ingeberg, Vetle Wegner [Show all 11 contributors for this article] (2018). Gamma-widths, lifetimes and fluctuations in the nuclear quasi-continuum. The European Physical Journal Conferences. ISSN 2101-6275. 178(06001). doi: 10.1051/epjconf/201817806001. Full text in Research Archive
Brits, C.P.; Wiedeking, M.; Bello Garrote, Frank Leonel; Bleuel, D. L.; Giacoppo, F. & Görgen, Andreas [Show all 21 contributors for this article] (2017). Resonances in odd-odd 182Ta. The European Physical Journal Conferences. ISSN 2101-6275. 146. doi: 10.1051/epjconf/201714605012. Full text in Research Archive
Malatji, Kgashane L.; Kheswa, Bonginkosi Vincent; Wiedeking, M.; Bello Garrote, Frank Leonel; Brits, C.P. & Bleuel, D. L. [Show all 20 contributors for this article] (2017). Nuclear level densities and γ-ray strength functions of 180,181Ta and neutron capture cross sections. The European Physical Journal Conferences. ISSN 2101-6275. 146. doi: 10.1051/epjconf/201714601010. Full text in Research Archive
Larsen, Ann-Cecilie; Spyrou, Artemis; Liddick, Sean N.; Guttormsen, Magne Sveen; Ingeberg, Vetle Wegner & Siem, Sunniva [Show all 25 contributors for this article] (2017). Novel Techniques for Constraining Neutron-capture Rates relevant to Heavy-element Nucleosynthesis. Proceedings of Science (PoS). ISSN 1824-8039. INPC2016. doi: 10.22323/1.281.0360. Full text in Research Archive
Wilson, JN; Lebois, M; Qi, L; Amador-Celdran, P; Bleuel, D & Briz, JA [Show all 48 contributors for this article] (2017). Production and study of neutron-rich nuclei using the licorne directional neutron source. Acta Physica Polonica B. ISSN 0587-4254. 48(3), p. 395–401. doi: 10.5506/APhysPolB.48.395. Full text in Research Archive
Wilson, JN; Lebois, M; Qi, L; Amador-Celdran, P; Bleuel, D & Briz, JA [Show all 49 contributors for this article] (2017). Anomalies in the Charge Yields of Fission Fragments from the U (n,f) 238 Reaction. Physical Review Letters. ISSN 0031-9007. 118(22). doi: 10.1103/PhysRevLett.118.222501. Full text in Research Archive
Larsen, Ann-Cecilie; Guttormsen, Magne Sveen; Blasi, Nives; Bracco, Angela; Camera, Franco & Crespo Campo, Lucia [Show all 23 contributors for this article] (2017). Low-energy enhancement and fluctuations of γ-ray strength functions in 56,57Fe: test of the Brink–Axel hypothesis. Journal of Physics G: Nuclear and Particle Physics. ISSN 0954-3899. 44(6). doi: 10.1088/1361-6471/aa644a. Full text in Research Archive
Larsen, Ann-Cecilie; Spyrou, Artemisia; Liddick, Sean N.; Guttormsen, Magne Sveen; Ingeberg, Vetle Wegner & Siem, Sunniva [Show all 25 contributors for this article] (2016). Novel techniques for constraining neutron-capture rates relevant to heavy-element nucleosynthesis. Proceedings of Science (PoS). ISSN 1824-8039. 2016-September:360, p. 1–9. Full text in Research Archive
Ay, K.o.; Ozgur, Mustafa; Algin, Emel; Guttormsen, Magne Sveen; Bello Garrote, Frank Leonel & Crespo Campo, Lucia [Show all 19 contributors for this article] (2016). Nuclear level densities and gamma-ray strength functions of 145,149,151Nd isotopes. Journal of Physics: Conference Series (JPCS). ISSN 1742-6588. 766(012027). doi: 10.1088/1742-6596/766/1/012027.

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Ingeberg, Vetle Wegner (2024). The OSCAR array.
Ingeberg, Vetle Wegner (2023). The Oslo Method III: Experiments.
Paulsen, Wanja; Li, Kevin Ching Wei; Siem, Sunniva; Ingeberg, Vetle Wegner; Larsen, Ann-Cecilie & Eriksen, Tomas Kvalheim [Show all 20 contributors for this article] (2023). Remeasuring the gamma-decay branching ratio of the Hoyle state.
Ingeberg, Vetle Wegner (2023). The Oslo Method II: he Oslo Method How-To.
Ingeberg, Vetle Wegner (2023). The Oslo SCintillator ARray (OSCAR).
Ingeberg, Vetle Wegner (2023). The Oslo Method at iThemba LABS.
Ingeberg, Vetle Wegner (2023). The Oslo Method in Inverse Kinematics.
Ingeberg, Vetle Wegner (2023). The Oslo Method at HIE-ISOLDE.
Ingeberg, Vetle Wegner (2023). The Oslo Method I: Introduction.
Ingeberg, Vetle Wegner (2022). The Nuclear Level Density and Gamma-ray Strength Function of 67Ni.
Ingeberg, Vetle Wegner (2022). The Oslo Method in Inverse Kinematics: The Good, The Bad and The Ugly.
Ingeberg, Vetle Wegner (2022). The Oslo Method.
Ingeberg, Vetle Wegner (2019). Progress of the IS559 experiment.
Ingeberg, Vetle Wegner; Siem, Sunniva; Wiedeking, M.; Abrahams, Kenzo John; Arnswald, K. & Bello Garrote, Frank Leonel [Show all 36 contributors for this article] (2019). Inverse-Oslo Method – a tool for expanding our understanding of the r-process.
Ingeberg, Vetle Wegner (2018). Developing the Oslo SCintillator ARray (OSCAR). Show summary
A new high efficiency scintillator array consisting of 30 large volume LaBr3(Ce) detectors are currently being developed at the Oslo Cyclotron Laboratory (OCL), University of Oslo. The first commissioning experiments was performed in December 2017 with 15 of the detectors installed. The array has been characterized and response functions have been extracted from in-beam particle-γ coincidences. The experimental response functions have been reproduced by Geant4 simulations modeling the full setup. The data acquisition system at OCL will be replaced by modern electronics from XIA in mid February, 2018.
Ingeberg, Vetle Wegner (2018). The Inverse-Oslo method.
Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Midtbø, Jørgen E.; Crespo Campo, Lucia; Görgen, Andreas & Ingeberg, Vetle Wegner [Show all 11 contributors for this article] (2017). Gamma-widths, lifetimes and fluctuations in the nuclear quasi-continuum.

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Published Aug. 18, 2017 11:19 AM - Last modified Jan. 15, 2024 11:52 AM

Research groups

Nuclear and Energy Physics