91 citations · 785 across the 24 of their papers we have counts for
24 papers
Evolution of the -ray strength function in neodymium isotopes
M. Guttormsen, K. O. Ay, M. Ozgur +24
The experimental gamma-ray strength functions (gamma-SFs) of 142,144-151Nd have been studied for gamma-ray energies up to the neutron separation energy. The results represent a uni…
Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes
M. Guttormsen, Y. Alhassid, W. Ryssens +19
Understanding the evolution of level densities in the crossover from spherical to well-deformed nuclei has been a long-standing problem in nuclear physics. We measure nuclear level…
Nuclear level densities and gamma-ray strength functions of Ta
C. P. Brits, K. L. Malatji, M. Wiedeking +24
Particle- coincidence experiments were performed at the Oslo Cyclotron Laboratory with the Ta(d,X) and Ta(He,X) reactions, to measure the nuclear level den…
Evidence for coexisting shapes in Zr through lifetime measurements
Purnima Singh, W. Korten, T. W. Hagen +35
The lifetimes of first excited 2, 4 and 6 states in Zr were measured with the Recoil-Distance Doppler Shift method in an experiment performed at GANIL. Excited s…
Experimental -decay strength in Ni compared with microscopic calculations
T. Renstrøm, G. M. Tveten, J. E. Midtbø +20
Nuclear level densities and -ray strength functions have been extracted for , using the Oslo method on data sets from the Ni(He,He$^{\prime}…
Energy dependence of the prompt -ray emission from the -induced fission of and
S. J. Rose, F. Zeiser, J. N. Wilson +22
Prompt fission -rays are responsible for approximately 5\% of the total energy released in fission, and therefore important to understand when modelling nuclear reactors. In thi…
Quasicontinuum -decay of Zr: benchmarking indirect () cross section measurements for the -process
M. Guttormsen, S. Goriely, A. C. Larsen +10
Nuclear level densities (NLDs) and -ray strength functions (SFs) have been extracted from particle- coincidences of the Zr()Zr and Zr()…
La(, ) cross sections constrained with statistical decay properties of La nuclei
Bonginkosi Vincent Kheswa, Mathis Wiedeking, Josh Brown +22
The nuclear level densities and -ray strength functions of La were measured using the La(He, ), La(He, He) and $^{1…
Low-energy enhancement and fluctuations of -ray strength functions in Fe: test of the Brink-Axel hypothesis
A. C. Larsen, M. Guttormsen, N. Blasi +21
Nuclear level densities and -ray strength functions of Fe have been extracted from proton- coincidences. A low-energy enhancement in the -ray strength functions…
Completing the nuclear reaction puzzle of the nucleosynthesis of 92Mo
G. M. Tveten, A. Spyrou, R. Schwengner +20
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…
Study of the 238U(d,p) surrogate reaction via the simultaneous measurement of gamma-decay and fission probabilities
Q. Ducasse, B. Jurado, M. Aïche +26
We investigated the 238U(d,p) reaction as a surrogate for the n + 238U reaction. For this purpose we measured for the first time the gamma-decay and fission probabilities of 239U*…
Low-energy enhancement in the γ-ray strength functions of Ge
T. Renstrøm, H. -T. Nyhus, H. Utsumoniya +22
The -ray strength functions and level densities of Ge have been extracted up to the neutron separation energy S from particle- coincidence data using the Oslo m…
Experimentally constrained ()Y and ()Y reaction rates relevant to the -process nucleosynthesis
A. C. Larsen, M. Guttormsen, R. Schwengner +18
The nuclear level density and the -ray strength function have been extracted for Y, using the Oslo Method on Y()Y coincidence data. The -ray stre…
Experimental level densities of atomic nuclei
M. Guttormsen, M. Aiche, F. L. Bello Garrote +24
It is almost 80 years since Hans Bethe described the level density as a non-interacting gas of protons and neutrons. In all these years, experimental data were interpreted within t…
Shell-gap reduced level densities in Y
M. Guttormsen, A. C. Larsen, F. L. Bello Garrote +14
Particle- coincidences from the Y()Y and Y()Y reactions were utilized to obtain -ray spectra as function of excitation energy. The…
Level densities and thermodynamical properties of Pt and Au isotopes
F. Giacoppo, F. L. Bello Garrote, L. A. Bernstein +15
The nuclear level densities of Pt and Au below the neutron separation energy have been measured using transfer and scattering reactions. All the level densi…
Level density and gamma-ray strength function in the odd-odd 238Np
Tamás Gábor Tornyi, Magne Guttormsen, Tomas Kvalheim Eriksen +9
The level density and gamma-ray strength function in the quasi-continuum of 238Np has been measured using the Oslo method. The level density function follows closely the constant-t…
Observation of double pygmy resonances in Pt and enhanced astrophysical reaction rates
F. Giacoppo, F. L. Bello Garrote, T. K. Eriksen +12
Our measurements of Pt -strength functions show a double-humped enhancement in the MeV region. For the first time, the detailed shape of these resonances…
Neutron-skin thickness of Pb, and symmetry-energy constraints from the study of the anti-analog giant dipole resonance
A. Krasznahorkay, M. Csatlós, L. Csige +12
The Pb(,) Pb reaction at a beam energy of 30 MeV has been used to excite the anti-analog of the giant dipole resonance (AGDR) and to measure its -de…
Transitional strength in Cd isotopes
A. C. Larsen, I. E. Ruud, A. Bürger +12
The level densities and -ray strength functions of Cd have been extracted from particle- coincidence data using the Oslo method. The level densities are i…
Scissors resonance in the quasi-continuum of Th, Pa and U isotopes
M. Guttormsen, L. A. Bernstein, A. Görgen +16
The gamma-ray strength function in the quasi-continuum has been measured for 231-233Th, 232,233Pa and 237-239U using the Oslo method. All eight nuclei show a pronounced increase in…
Evidence for dipole nature of the low-energy enhancement in Fe
A. C. Larsen, N. Blasi, A. Bracco +16
The -ray strength function of Fe has been measured from proton- coincidences for excitation energies up to MeV. The low-energy enhancement in the -ray…
Constant-temperature level densities in the quasi-continuum of Th and U isotopes
M. Guttormsen, B. Jurado, J. N. Wilson +16
Particle-gamma coincidences have been measured to obtain gamma-ray spectra as a function of excitation energy for 231-233Th and 237-239U. The level densities, which were extracted…
Observation of large scissors resonance strength in actinides
M. Guttormsen, L. A. Bernstein, A. Bürger +8
The orbital M1-scissors resonance (SR) has been measured for the first time in the quasi-continuum of actinides. Particle-gamma coincidences are recorded with deuteron and 3He indu…