Browsing Fysisk institutt by Author "Nyhus, Hilde-Therese"

Now showing items 1-20 of 22

  • 137,138,139La(n,γ) cross sections constrained with statistical decay properties of 138,139,140La nuclei 
    Kheswa, Bonginkosi Vincent; Wiedeking, Mathis; Brown, Joshua A.; Larsen, Ann-Cecilie; Goriely, Stéphane; Guttormsen, Magne Sveen; Bello Garrote, Frank Leonel; Bernstein, Lee A.; Bleuel, Darren L.; Eriksen, Tomas Kvalheim; Giacoppo, Francesca; Görgen, Andreas; Goldblum, Bethany L.; Hagen, Trine Wiborg; Koehler, Paul Edward; Klintefjord, Malin; Malatji, Kgashane L.; Midtbø, Jørgen Eriksson; Nyhus, Hilde-Therese; Papka, P.; Renstrøm, Therese; Rose, Sunniva Johanne; Sahin, Eda; Siem, Sunniva; Tornyi, Tamas Gabor (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    The nuclear level densities and γ-ray strength functions of 138,139,140La were measured using the 139La(3He,α), 139La(3He,'3He), and 139La(d,p) reactions. The particle-γ coincidences were recorded with the silicon particle ...
  • Average properties of nuclear states in the quasi-continuum region 
    Nyhus, Hilde-Therese (Doctoral thesis / Doktoravhandling, 2014)
    Intense effort to explore the atomic nucleus has persisted through the past century. Despite of the great efforts, there still remains many open questions regarding the properties of the nucleus. In particular, the low ...
  • Completing the nuclear reaction puzzle of the nucleosynthesis of Mo 92 
    Tveten, Gry Merete; Spyrou, A; Schwengner, R; Naqvi, F; Larsen, Ann-Cecilie; Eriksen, Tomas Kvalheim; Bello Garrote, Frank Leonel; Bernstein, LA; Bleuel, DL; Crespo Campo, Lucia; Guttormsen, Magne Sveen; Giacoppo, Francesca; Görgen, Andreas; Hagen, Trine Wiborg; Hadynska-Klek, Katarzyna; Klintefjord, Malin; Meyer, BS; Nyhus, Hilde-Therese; Renstrøm, Therese; Rose, Sunniva Johanne; Sahin, Eda; Siem, Sunniva; Tornyi, Tamas Gabor (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    One of the greatest questions for modern physics to address is how elements heavier than iron are created in extreme astrophysical environments. A particularly challenging part of that question is the creation of the ...
  • Evidence for the dipole nature of the low-energy γ enhancement in 56Fe 
    Larsen, Ann-Cecilie; Blasi, Nives; Bracco, Angela; Camera, Franco; Eriksen, Tomas Kvalheim; Görgen, Andreas; Guttormsen, Magne Sveen; Hagen, Trine Wiborg; Leoni, Silvia; Million, Bénédicte; Nyhus, Hilde-Therese; Renstrøm, Therese; Rose, Sunniva Johanne; Ruud, Inger Eli; Siem, Sunniva; Tornyi, Tamas Gabor; Tveten, Gry Merete; Voinov, Alexander; Wiedeking, Mathis (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    The γ-ray strength function of 56Fe has been measured from proton-γ coincidences for excitation energies up to ≈11  MeV. The low-energy enhancement in the γ-ray strength function, which was first discovered in the (3He,αγ)56Fe ...
  • First evidence of low energy enhancement in Ge isotopes 
    Renstrøm, Therese; Nyhus, Hilde-Therese; Utsunomiya, Hiroaki; Larsen, Ann-Cecilie; Siem, Sunniva; Guttormsen, Magne Sveen; Filipescu, Dan Mihai; Gheorghe, I.; Goriely, Stephane; Bernstein, L. A.; Bleuel, Darren L.; Glodariu, T.; Görgen, Andreas; Hagen, Trine Wiborg; Lui, Y.-W.; Negi, Dinesh; Ruud, Inger Eli; Sahin, Eda; Schwengner, Ronald; Shima, T.; Takahisa, K.; Tesileanu, O.; Tornyi, Tamas Gabor; Tveten, Gry Merete; Wiedeking, Mathis (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    The γ-strength functions and level densities of 73,74Ge have been extracted from particle-γ coincidence data using the Oslo method. In addition the γ-strength function of 74Ge above the neutron separation threshold, Sn = ...
  • Galactic production of 138La: Impact of 138,139La statistical properties 
    Kheswa, Bonginkosi Vincent; Wiedeking, Mathis; Giacoppo, Francesca; Goriely, Stephan; Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Bello Garrote, Frank Leonel; Eriksen, Tomas Kvalheim; Görgen, Andreas; Hagen, Trine Wiborg; Koehler, Paul Edward; Klintefjord, Malin; Nyhus, Hilde-Therese; Papka, P.; Renstrøm, Therese; Rose, Sunniva Johanne; Sahin, Eda; Siem, Sunniva; Tornyi, Tamas Gabor (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    The γ-ray strength functions and nuclear level densities of 138La and 139La have been measured below the neutron separation energies. These new data were used to calculate astrophysical Maxwellian-averaged () cross-sections ...
  • Gamma decay from the quasicontinuum of 197,198Au 
    Giacoppo, Francesca; Bello Garrote, Frank Leonel; Bernstein, Lee; Bleuel, D.l.; Firestone, R.B.; Görgen, Andreas; Guttormsen, Magne Sveen; Hagen, Trine Wiborg; Klintefjord, Malin; Koehler, Paul Edward; Larsen, Ann-Cecilie; Nyhus, Hilde-Therese; Renstrøm, Therese; Sahin, Eda; Siem, Sunniva; Tornyi, Tamas Gabor (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    The average electromagnetic dipole response of levels in the quasicontinuum of 197,198Au has been measured using (3He,3He ) and (d,p) reactions. The extracted γ -ray strength functions have been normalized according to ...
  • Level densities and thermodynamical properties of Pt and Au isotopes 
    Giacoppo, Francesca; Bello Garrote, Frank Leonel; Bernstein, L. A.; Bleuel, D. L.; Eriksen, Tomas Kvalheim; Firestone, Richard; Görgen, Andreas; Guttormsen, Magne Sveen; Hagen, Trine Wiborg; Kheswa, Bonginkosi Vincent; Klintefjord, Malin; Koehler, Paul Edward; Larsen, Ann-Cecilie; Nyhus, Hilde-Therese; Renstrøm, Therese; Sahin, Eda; Siem, Sunniva; Tornyi, Tamas Gabor (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    The nuclear level densities of 194–196Pt and 197,198Au below the neutron separation energy have been measured using transfer and scattering reactions. All the level density distributions follow the constant-temperature ...
  • Level densities, thermodynamics and the γ-ray strength functions in 163,164Dy 
    Nyhus, Hilde-Therese (Master thesis / Masteroppgave, 2008)
    The nuclei 163,164 Dy were analyzed at the Oslo Cyclotron laboratory (OCL) by use of the so-called Oslo method. This method enables us to extract both the level density and the γ -ray strength function simultaneously from ...
  • Low-energy enhancement and fluctuations of γ-ray strength functions in 56,57Fe: test of the Brink–Axel hypothesis 
    Larsen, Ann-Cecilie; Guttormsen, Magne Sveen; Blasi, Nives; Bracco, Angela; Camera, Franco; Crespo Campo, Lucia; Eriksen, Tomas Kvalheim; Görgen, Andreas; Hagen, Trine Wiborg; Ingeberg, Vetle Wegner; Kheswa, Bonginkosi Vincent; Leoni, Silvia; Midtbø, Jørgen Eriksson; Million, Bénédicte; Nyhus, Hilde-Therese; Renstrøm, Therese; Rose, Sunniva Johanne; Ruud, Inger Eli; Siem, Sunniva; Tornyi, Tamas Gabor; Tveten, Gry Merete; Voinov, Alexander; Wiedeking, Mathis; Zeiser, Fabio (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    Nuclear level densities and γ-ray strength functions of 56,57Fe have been extracted from proton-γ coincidences. A low-energy enhancement in the γ-ray strength functions up to a factor of 30 over common theoretical E1 models ...
  • Low-energy enhancement in the γ-ray strength functions of Ge73,74 
    Renstrøm, Therese; Nyhus, Hilde-Therese; Utsunomiya, Hiroaki; Schwengner, Ronald; Goriely, Stephane; Larsen, Ann-Cecilie; Filipescu, Dan Mihai; Gheorghe, Ioana; Bernstein, L. A.; Bleuel, Darren L.; Glodariu, T.; Görgen, Andreas; Guttormsen, Magne Sveen; Hagen, Trine Wiborg; Kheswa, Bonginkosi Vincent; Lui, Y.-W.; Negi, Dinesh; Ruud, Inger Eli; Shima, T.; Siem, Sunniva; Takahisa, K.; Tesileanu, O.; Tornyi, Tamas Gabor; Tveten, Gry Merete; Wiedeking, Mathis (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    The γ -ray strength functions and level densities of 73,74Ge have been extracted up to the neutron-separation energy Sn from particle-γ coincidence data using the Oslo method. Moreover, the γ -ray strength function of 74Ge ...
  • Low-energy enhancement of nuclear γ strength and its impact on astrophysical reaction rates 
    Larsen, Ann-Cecilie; Blasi, Nives; Bracco, Angela; Bürger, Arnold; Camera, Franco; Eriksen, Tomas Kvalheim; Giacoppo, Francesca; Goriely, Stephan; Guttormsen, Magne Sveen; Görgen, Andreas; Hagen, Trine Wiborg; Harissopulos, Sotirios; Koehler, Paul Edward; Leoni, Silvia; Million, Bénédicte; Nyhus, Hilde-Therese; Renstrøm, Therese; Rose, Sunniva Johanne; Ruud, Inger Eli; Schiller, Andreas Ulrich; Siem, Sunniva; Tornyi, Tamas Gabor; Tveten, Gry Merete; Voinov, Alexander; Wiedeking, Mathis (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    An unexpected enhancement in the low-energy part of the γ-strength function for light and medium-mass nuclei has been discovered at the Oslo Cyclotron Laboratory. This enhancement could lead to an increase in the neutron-capture ...
  • Nuclear level densities and γ-ray strength functions of 180,181Ta and neutron capture cross sections 
    Malatji, Kgashane L.; Kheswa, Bonginkosi Vincent; Wiedeking, M.; Bello Garrote, Frank Leonel; Brits, C.P.; Bleuel, D. L.; Giacoppo, Francesca; Görgen, Andreas; Guttormsen, Magne Sveen; Hadynska-Klek, Katarzyna; Hagen, Trine Wiborg; Ingeberg, Vetle Wegner; Klintefjord, Malin; Larsen, Ann-Cecilie; Nyhus, Hilde-Therese; Renstrøm, Therese; Rose, Sunniva Johanne; Sahin, Eda; Siem, Sunniva; Tveten, Gry Merete; Zeiser, Fabio (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    The γ -ray strength functions and nuclear level densities in the quasi-continuum of 180,181Ta are extracted from particle-γ coincidence events with the Oslo Method, below the Sn . The data were used as input in the TALYS ...
  • Photoneutron cross sections for neodymium isotopes: Toward a unified understanding of (γ,n) and (n,γ) reactions in the rare earth region 
    Nyhus, Hilde-Therese; Renstrøm, Therese; Utsunomiya, Hiroaki; Goriely, S.; Filipescu, D. M.; Gheorghe, I.; Tesileanu, O.; Glodariu, T.; Shima, T.; Takahisa, K.; Miyamoto, S.; Lui, Y. W.; Hilaire, S.; Péru, S.; Martini, M.; Siess, L.; Koning, A. J. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
  • Photoneutron cross sections for samarium isotopes: Toward a unified understanding of (y, n) and (n, y) reactions in the rare earth region 
    Filipescu, D. M.; Gheorghe, I.; Utsunomiya, Hiroaki; Goriely, S.; Renstrøm, Therese; Nyhus, Hilde-Therese; Tesileanu, O.; Glodariu, T.; Shima, T.; Takahisa, K.; Miyamoto, S.; Lui, Y. W.; Hilaire, S.; Péru, S.; Martini, M.; Koning, A. J. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
  • Radiative Width of the Hoyle State from γ -Ray Spectroscopy 
    Kibédi, T.; Alshahrani, B.; Stuchbery, A.E.; Larsen, Ann-Cecilie; Görgen, Andreas; Siem, Sunniva; Guttormsen, Magne Sveen; Giacoppo, Francesca; Morales, A.I.; Sahin, Eda; Tveten, Gry Merete; Bello Garrote, Frank Leonel; Crespo Campo, Lucia; Eriksen, Tomas Kvalheim; Klintefjord, Malin; Maharramova, Sabina; Nyhus, Hilde-Therese; Tornyi, Tamas Gabor; Renstrøm, Therese; Paulsen, Wanja (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The cascading 3.21 and 4.44 MeV electric quadrupole transitions have been observed from the Hoyle state at 7.65 MeV excitation energy in 12C, excited by the 12C(p,p′) reaction at 10.7 MeV proton energy. From the proton-γ−γ ...
  • Resonances in odd-odd 182Ta 
    Brits, C.P.; Wiedeking, M.; Bello Garrote, Frank Leonel; Bleuel, D. L.; Giacoppo, F.; Görgen, Andreas; Guttormsen, Magne Sveen; Hadynska-Klek, Katarzyna; Hagen, Trine Wiborg; Ingeberg, Vetle Wegner; Kheswa, Bonginkosi Vincent; Klintefjord, Malin; Larsen, Ann-Cecilie; Malatji, Kgashane L.; Nyhus, Hilde-Therese; Papka, P; Renstrøm, Therese; Rose, Sunniva Johanne; Sahin, Eda; Siem, Sunniva; Tveten, Gry Merete; Zeiser, Fabio (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Enhanced γ -decay on the tail of the giant electric dipole resonance, such as the scissors or pygmy resonances, can have significant impact on (n,γ ) reaction rates. These rates are important input for modeling processes ...
  • The statistical properties of 111,112,113Sn studied with the Oslo method 
    Tveten, Gry Merete; Bello Garrote, Frank Leonel; Crespo Campo, Lucia; Eriksen, Tomas Kvalheim; Giacoppo, Francesca; Guttormsen, Magne Sveen; Görgen, Andreas; Hagen, Trine Wiborg; Hadynska-Klek, Katarzyna; Klintefjord, Malin; Larsen, Ann-Cecilie; Maharramova, Sabina Abulfaz; Nyhus, Hilde-Therese; Renstrøm, Therese; Rose, Sunniva Johanne; Sahin, Eda; Siem, Sunniva; Tornyi, Tamas Gabor (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    The γ-ray strength function and level density of 111, 112, 113Sn are being studied at the Oslo Cyclotron Laboratory (OCL) up to the neutron binding energy by applying the Oslo method to particle-γ coincidence data. The ...
  • The Statistical Properties Of 92Mo And Implications For The p-process 
    Tveten, Gry Merete; Spyrou, Artemis; Schwengner, Ronald; Naqvi, Farheen; Larsen, Ann-Cecilie; Eriksen, Tomas Kvalheim; Bello Garrote, Frank Leonel; Bernstein, Lee A.; Bleuel, Darren L.; Crespo Campo, Lucia; Guttormsen, Magne Sveen; Giacoppo, Francesca; Görgen, Andreas; Hagen, Trine Wiborg; Hadynska-Klek, Katarzyna; Klintefjord, Malin; meyer, b. s.; Nyhus, Hilde-Therese; Renstrøm, Therese; Rose, Sunniva Johanne; Sahin, Eda; Siem, Sunniva; Tornyi, Tamas Gabor (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    A particularly challenging part of the question of how elements heavier than iron are created in extreme, astrophysical environments is the creation of the so-called p-nuclei, which are believed to be mainly produced in ...
  • Transitional γ strength in Cd isotopes 
    Larsen, Ann-Cecilie; Bürger, Alexander; Goriely, Stephane; Guttormsen, Magne Sveen; Görgen, Andreas; Hagen, Trine Wiborg; Harrisopulos, Sotirios; Nyhus, Hilde-Therese; Renstrøm, Therese; Schiller, Andreas Ulrich; Siem, Sunniva; Tveten, Gry Merete; Voinov, Alexander; Wiedeking, Mathis; Ruud, Inger Eli (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    The level densities and γ-ray strength functions of 105,106,111,112Cd have been extracted from particle-γ coincidence data using the Oslo method. The level densities are in very good agreement with known levels at low ...