Seminar Details

Beta-decay Spectroscopy Relevant to r-process Nucleosynthesis

Alex Dombos, MSU NSCL/Physics
Thursday, April 17, 11:00 AM - 1st Guidance Committee Meeting
NSCL Lecture Hall

In the field of nuclear astrophysics, a better understanding of the r-process is needed to explain the abundance of the heavy elements in the universe. The r-process occurs in stellar environments in which there is a large density of neutrons - conditions that allow a nucleus to capture many neutrons before undergoing beta decay back to the valley of stability. Thus accurate modeling of the r-process requires knowledge of properties related to the beta decay of these exotic neutron-rich nuclei such as beta-decay half-lives and beta-delayed neutron emission probabilities. Many of these properties are related to the beta-decay strength distribution which can provide a sensitive constraint to theoretical models. The technique of total absorption spectroscopy is a powerful technique to accurately measure quantities needed to calculate the beta-decay strength distribution. In this talk, I will discuss preliminary results of the first test of total absorption spectroscopy of 76Ga with the Summing NaI(Tl) (SuN) detector and will present plans for future experiments on r-process nuclei.