[en] Separate abstracts were prepared for 5 panel reports and 8 appendices for the workshop

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[en] As Ken Hulet's scientific work has centered on exploring the actinides and transactinides, it is appropriate to discuss some recent studies involving the higher actinides. A major objective in the research is to determine the changing role of the 5f-electrons across the series through systematics. However, short half lives and scarcity of the highest members of the actinide series limit even pseudo-solid/vapor state research to mendelevium or lighter members of the actinide series. Recent studies on the phase behavior and high-temperature properties of the transplutonium metals and oxides are discussed in terms of the position of the elements in the series. For example, the high-temperature behaviors of actinide oxides has been found to be dependent on the electronic nature of the actinide making up the oxide and a major factor in determining the vaporization process of sesquioxides is the promotion energy of the actinide's f-electrons

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[en] With the increasingly short half-lives of the heavy element isotopes in the transition region from the heaviest actinides to the transactinide elements the demand for automated rapid chemistry techniques is also increasing. Separation times of significantly less than one minute, high chemical yields, high repetition rates, and an adequate detection system are prerequisites for many successful experiments in this field. The development of techniques for separations in the gas phase and in the aqueous phase for applications of chemical or nuclear studies of the heaviest elements are briefly outlined. Typical examples of results obtained with automated techniques are presented for studies up to element 105, especially those obtained with the Automated Rapid Chemistry Apparatus, ARCA. The prospects to investigate the properties of even heavier elements with chemical techniques are discussed

[en] Non-neutron nuclear data have been reviewed and recommended values are presented in the Table of the Isotopes to be published in the Chemical Rubber Company's 1998--1999 Handbook of Chemistry and Physics. The information, which is presented in the Isotopes Table for each known chemical element and for each ground state and long-lived isomeric state nuclide of each element includes the atomic weight of the element and the atomic mass of the ground state nuclide, isotopic abundance value (if the nuclide is stable) or the radioactive half-life (if the nuclide is not stable), the mode of decay, branching ratio and the total disintegration energy, the discrete energies of the alpha particles, protons or neutrons and end point energies of beta transitions and their respective intensities. The following additional information is also included, the nuclear spin and parity, the magnetic dipole moment and the electrical quadrupole moment and the gamma ray energies and intensities

[en] Termination of plutonium part fabrication in the fall of 1989 was followed by the sudden cessation of plutonium processing throughout the U.S. Department of Energy (DOE) complex, leaving reactive residual plutonium legacy materials. There is ∼26 tonnes of plutonium in vulnerable condition located throughout the nuclear complex. This material does not include plutonium, which is safely located in weapons and weapons assemblies. Four sites-Rocky Flats Environmental Technology Site, Westinghouse Hanford Company, Los Alamos National Laboratory (LANL), and Savannah River Site-hold major amounts of plutonium feed materials that must now be stabilized and repackaged. Lawrence Livermore National Laboratory and other sites have lesser amounts

[en] The physico-chemical properties of the late actinide metals americium through einsteinium are compared with their rare-earth counterparts. Localization of the 5f electrons beginning at americium signals the appearance of true rare-earth-like properties, but the homologous relationship is shifted to place americium below praseodymium, einsteinium then below europium. The comparison of crystal structure, phase transitions, vapor pressures and heats of vaporization reveals remarkable similarities, especially for Sm-Cf and Eu-Es, where the stability of the divalent metal becomes established and divalent chemistry then follows. There is of course a major perturbation at the half-filled shell at curium, and it may be argued that americium is the anomaly in the so-called second rare-earth series. However, the response of americium, berkelium and californium under pressure reveals the true perturbation to be a thermodynamic one, occurring at curium