New Isotope 220Np: Probing the Robustness of the N = 126 Shell Closure in Neptunium
New isotope 220Np has been synthesised and its decay properties have been studied at SHANS. Combining with the results of 219,223Np, the stability of the N = 126 shell effect in Np isotopes have been tested for the first time. The results have been published in Physical Review Letters.