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In this paper we present the first systematic analysis of the impact of the populated vs. intrinsic spin distribution on the nuclear level density and $gamma$-ray strength function retrieved through the Oslo Method. We illustrate the effect of the spin distribution on the recently performed $^{239}mathrm{Pu}$(d,p$gamma$)$^{240}mathrm{Pu}$ experiment using a 12 MeV deuteron beam performed at the Oslo Cyclotron Lab. In the analysis we couple state-of-the-art calculations for the populated spin-distributions with the Monte-Carlo nuclear decay code RAINIER to compare Oslo Method results to the known input. We find that good knowledge of the populated spin distribution is crucial and show that the populated distribution has a significant impact on the extracted nuclear level density and $gamma$-ray strength function for the $^{239}mathrm{Pu}$(d,p$gamma$)$^{240}mathrm{Pu}$ case.
The Oslo Method has been applied to particle-$gamma$ coincidences following the $^{239}mathrm{Pu}$(d,p) reaction to obtain the nuclear level density (NLD) and $gamma$-ray strength function ($gamma$SF) of $^{240}mathrm{Pu}$. The experiment was conduct
Prompt fission $gamma$-rays are responsible for approximately 5% of the total energy released in fission, and therefore important to understand when modelling nuclear reactors. In this work we present prompt $gamma$-ray emission characteristics in fi
In this work, we have reviewed the Oslo method, which enables the simultaneous extraction of level density and gamma-ray transmission coefficient from a set of particle-gamma coincidence data. Possible errors and uncertainties have been investigated.
The $gamma$-ray strength function ($gamma$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 ran
The average prompt-fission-neutron multiplicity $bar{ u}$ is of significance in the areas of nuclear theory, nuclear nonproliferation, and nuclear energy. In this work, the surrogate-reaction method has been used for the first time to indirectly dete