EPJ Web Conf.
Volume 169, 2018Scientific Workshop on “Nuclear Fission Dynamics and the Emission of Prompt Neutrons and Gamma Rays“ (Theory-4)
|Number of page(s)||6|
|Published online||06 March 2018|
Determination of the nuclear level densities and radiative strength function for 43 nuclei in the mass interval 28≤A≤200
University of Novi Sad, Faculty of Science, Department of Physics, Trg Dositeja Obradovica 3, 21000 Novi Sad, Serbia
2 Joint Institute for Nuclear Research, 141980 Moscow region, Dubna, Russia
3 Technische Universität München, Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Lichtenbergstr. 1, 85747 Garching, Germany
4 European Commission, Joint Research Centre, Directorate G - Nuclear Safety and Security, Unit G.2, Retieseweg 111, 2440 Geel, Belgium
5 Institute of Physics Belgrade, Pregrevica 118, 11080 Zemun, Serbia
* e-mail: firstname.lastname@example.org
Published online: 6 March 2018
The determination of nuclear level densities and radiative strength functions is one of the most important tasks in low-energy nuclear physics. Accurate experimental values of these parameters are critical for the study of the fundamental properties of nuclear structure. The step-like structure in the dependence of the level densities p on the excitation energy of nuclei Eex is observed in the two-step gamma cascade measurements for nuclei in the 28 ≤ A ≤ 200 mass region. This characteristic structure can be explained only if a co-existence of quasi-particles and phonons, as well as their interaction in a nucleus, are taken into account in the process of gamma-decay. Here we present a new improvement to the Dubna practical model for the determination of nuclear level densities and radiative strength functions. The new practical model guarantees a good description of the available intensities of the two step gamma cascades, comparable to the experimental data accuracy.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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