Seminarium fizyki jądra atomowego
Dnia 20 listopada 2014 odbyło się seminarium pt.
„Role of Pairing Correlation in Two-Proton Emission”
prelegent: dr Tomohiro Oishi (Helsinki Institute of Physics and University of Jyväskylä, Finland)
Streszczenie: The pairing correlation between two nucleons plays an essential role in nuclear physics. Recently, the two-proton decay and emission have attracted much interest relevantly to the nuclear pairing correlation. Through these processes, a pair of protons is emitted sequentially or simultaneously from the parent nucleus. The emitted two protons are expected to provide information about the nuclear pairing correlation. In this seminar, we investigate a role of the pairing correlation in two-proton emitting processes. Obviously, an unified framework which treats both the quantum meta-stability and the many-body property is necessary. For this purpose we develop a time-dependent three-body model in which the two-proton emission is described as a time-evolution of the three-body meta-stable state. With this method, the dynamics of the two-proton emission can be intuitively discussed by monitoring the time-dependent two-particle density distribution. Applying this model to the 6Be nucleus, which is the lightest two-proton emitter, and employing a model Hamiltonian which well reproduces the empirical two-proton decay width, we will see that a strongly correlated diproton emission is dominant in the early stage of this process. We will also discuss several novel properties of the pairing correlation in the two-proton emission.