Figure 1: (IMAGE) Science China Press Caption The topologies pertaining to the (a) n, (b) p, (c) h and (d) r layers of the 40Ca's nucleus at the nuclear landscape. The network is built on the basis of the substrate-product method Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.