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Because the nuclear many-body problem has no closed form solution and is incredibly difficult to solve numerically, much of the research in nuclear physics centers around developing nuclear theory to overcome this or using phenomenological models, that rely on experimental data to constrain them, to search for correlations. Both methods are very computationally expensive, with nuclear theories attempting to solve some many-body Hamiltonian up to some precision or by fitting phenomenological models to large amounts of nuclear data. In this talk will discuss the latter topic, in particular the use of phenomenological R-matrix. I’ll give some background about it’s history of use and why it is still one of the leading methods used today, give an overview of the basic theory, give examples of its implementation and discuss the many modern problems that are still faced with its implementation.
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Elisabetta Baracchini