Two-proton radioactivity and three-body decay. II. Exploratory studies of lifetimes and correlations

Theoretical studies of prospective 2p emitters are performed in a three-body core +p+p model. Lifetime dependencies on the decay energy are calculated for Fe-45 , Ni-48 , Zn-54 , Ge-58 , Se-62 , Kr-66 , and compared to the quasiclassical estimates. The observation of products from the in-flight decays is discussed as an important technique supplementing a standard implantation method for a broad range of lifetimes of prospective two-proton emitters. The sensitivity of the model to various aspects of nuclear dynamics is demonstrated on the Fe-45 example. Possible momentum correlations for emitted protons are discussed with the emphasis on Mg-19 and Fe-45 . We study convergence and stability of theoretical momentum distributions with respect to different physical and numerical aspects of the model. Opportunities to extract valuable information on 2p emission from incomplete kinematics decay data are discussed.