Nuclear Torus

A nuclear torus, (plural nuclear tori) also known as a porous nucleus is a type of exotic stabilised atomic nucleus characterised by it's torus ("doughnut") shape, i.e.

a mass of nucleons surrounding an empty region.

The empty region is known as the nuclear pore. Although a nuclear torus could be made with as little as 6 nucleons, most significant nuclear tori had atomic masses in excess of 1000.

Nuclear tori are significant due to the unique conditions within their nuclear pores, and the effects that can be generated from them. Various particles, including leptons, hadrons and even small nuclei, could be passed through the pores, generating various forces, including tractism, nectism and ligism.