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The atomic nuclei represent a valuable field for testing the fundamental forces of nature as much as a challenge for experimental and theoretical physics. Experimental facilities, like the accelerator laboratory at the University of  Jyväskylä, allow us to produce and measure radioactive nuclear species, fighting against the short-lifetimes and exotic nature of these systems.

As we know it, the nucleus is formed by nucleons (neutrons and protons) interacting through the so-called strong interactions. According to the present-day understanding, these interactions have the character of chiral effective interactions - forces derived from the symmetries of the fundamental components of nucleons, quarks and gluons. Calculations using ab initio methods are based on first principles such that all nucleons are active and interacting with these chiral forces. Because large computational resources are required, we can perform such calculations only for a limited number of light nuclei. To describe all of them, more approximations are necessary, and thus one usually replaces the ab initio methods by models rooted in the so-called density functional theory.

In his thesis, Salvioni derived parameters of nuclear functionals from ab initio calculations with chiral interactions. In particular, he introduced perturbations to ground-state configurations of seven light nuclei, and, from the response to the perturbations, he evaluated the relevance of the parameters of functionals. He also tested these parameters against properties of infinite nuclear matter.

His work is a step in the direction of improving the accuracy of nuclear functionals, linking them to fundamental interactions. This gives us important inputs to set the limits of the bound nuclear species and to study a variety of nuclear phenomena.

Gianluca Salvioni obtained his M.Sc. Degree in theoretical physics at the University of Pisa (Italy), in 2014, with a thesis about knockout reactions from exotic nuclei. He began his doctoral studies at the Department of Physics of the Ä¢¹½Ö±²¥ in 2015, joining the FIDIPRO research group. His research has received the support from the Ä¢¹½Ö±²¥ and the Helsinki Institute of Physics.

M.Sc. Gianluca Salvioni defends his doctoral dissertation on theoretical physics " Model Nuclear Energy  Density Functionals derived from ab initio calculations" on Friday 7th of June 2019 at 12.00 in FYS1, Department of Physics. The opponent is Professor Richard J. Furnstahl (The Ohio State University, USA) and custos Professor Jacek Dobaczewski (Ä¢¹½Ö±²¥ and University of York). The dissertation is in English.

The dissertation is published in the JYU Dissertations series, Ä¢¹½Ö±²¥, No. 88

ISBN 978-951-39-7775-7 (PDF), ISSN 2489-9003

Link to publication:

More information:
M.Sc. Gianluca Salvioni, gianluca.g.salvioni@jyu.fi
Communications officer Tanja Heikkinen, tanja.s.heikkinen@jyu.fi, tel. +358 50 581 8351
Faculty of Mathematics and Science
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