title: "Sand bar" of actinoid and neighboring elements in a chart of nuclides.
abstract: Inspection of a chart of nuclides reveals a "sand bar" of actinoid and neighboring elements when a suitable half-life level is chosen. A bay of alpha-instability lying between the nuclides of neutron magic number 126 and the beta-stability line in the actinoid group is a characteristic feature in this area. Calculation shows that fairly good agreement is obtained between the measured half-lives and those derived theoretically.
mesh_terms: D008671:Actinoid Series Elements; D000512:Alpha Particles; D004583:Electrons; D006207:Half-Life; D008962:Models, Theoretical; D009502:Neutrons; D011868:Radioisotopes
chemical_list: D008671:Actinoid Series Elements; D011868:Radioisotopes