Quantum-Mechanical Models of a Nucleus

IN their recent paper, 1 Lord Rutherford and Dr Ellis have shown how the numerous γ-rays of radium C′ can be arranged in a simple and orderly manner, which suggests, as they point out, that the multiplicity of the γ-rays is largely due to the excitation of several α-particles into the same excited level rather than to the excitation of one α-particle into several excited levels. Their arrangement of the lines of radium C′ is probably not a unique scheme of this sort, but any reasonable scheme appears likely (they show) to present the same general features.