Nuclear Physics Seminar: Improved understanding of the structure of 100Sn and nuclei in its vicinity
Speaker: Jason Park, UBC
Location: Auditorium
Time: 15:30
Multiple intriguing topics of nuclear structure converge on the doubly-magic nucleus 100Sn, which is known for its superallowed Gamow-Teller (GT) decay with the largest GT strength of all allowed nuclear beta decays. Experimental data on 100Sn and its neighbours provide sensitive tests of nuclear structure theories: robustness of N = Z = 50 shells, limits of proton binding, proton-neutron interactions of heavy N ~ Z nuclei, etc. In addition, macroscopic properties of these nuclei are essential inputs for the rp-process of nuclear astrophysics. A decay spectroscopy experiment in the 100Sn region was performed at the RIKEN Nishina Center. A new record for 100Sn production was achieved, accompanied by the discovery of exotic N < Z isotopes at or beyond the proton drip line. Beta decays, beta-delayed proton emission, and gamma rays of N ~ Z nuclei were measured and analysed to address the topics of interest stated above. The results from this experiment are generally consistent with shell model predictions based on robust N = Z = 50 shell closures. Prospective experiments to address remaining questions in this region of nuclides will be presented.