Speaker
Description
Exotic decay beyond the nuclear dripline represents a frontier in understanding the nuclear landscape. Among these phenomena, two-proton (2$p$) radioactivity emerges as a distinctive three-body process, involving the simultaneous emission of two protons from the ground state of even-Z, neutron-deficient nuclei. Recent advancements in measuring proton-proton correlations have reignited interest in this area, highlighting the interplay between structure and reaction dynamics in nuclear open quantum systems. As a complementary process, two-neutron (2$n$) emission―recently observed in certain neutron-rich dripline nuclei―has similarly garnered attention. Comparing these two exotic processes offers valuable insights into the interplay between Coulomb and nuclear interactions in the presence of a low-lying continuum. Our study employs the Gamow coupled-channel method alongside a time-dependent approach, revealing how the structure of the initial wave function, shaped by both initial-state and final-state interactions, crucially influences decay dynamics [1] and proton-proton correlations [2]. Additionally, by analyzing the energy dependence of these correlations, we uncover unique insights into non-exponential decay mechanisms [3], deepening our understanding of open quantum system properties.
[1] S. M. Wang and W. Nazarewicz, Phys. Rev. Lett. 126 (2021) 142501.
[2] S. M. Wang, W. Nazarewicz, R. J. Charity, and L. G. Sobotka, J. Phys. G 49, (2022) 10LT02.
[3] S. M. Wang, W. Nazarewicz, A. Volya, and Y. G. Ma, Phys. Rev. Research 5, 023183 (2023).
