Discovery of Isotopes of the Transuranium Elements with 93 <= Z <= 98
  One hundred and five isotopes of the transuranium elements neptunium, plutonium, americium, curium, berkelium and californium have so far been observed; the discovery of these isotopes is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented. 
C. Fry and M. Thoennessen
nucl-ex