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Open Access Publications from the University of California

Scholarly Works (4 results)

  • Article
LBL Publications (2004)
    Cover page: Toward volatile metal complexes of rutherfordium - results of test exeriments with Zr and Hf
    • Article
    • Peer Reviewed
    LBL Publications (2004)
      Cover page: Development of an odd-Z-projectile reaction for heavy element synthesis: 208Pb(64Ni, n)271Ds and 208Pb(65Cu, n)272111
      • Article
      LBL Publications (2004)
      The production of neutron-deficient transactinide isotopes using cold fusion reactions has been studied in recent experiments with the Berkeley Gas-filled Separator (BGS). These experiments were part of a systematic study of using odd-Z projectile reactions for heavy element synthesis. Targets of 208Pb were bombarded with projectiles of 64Ni, 65Cu, and 55Mn to produce 271Ds, 272-111, and isomers of 262Bh, respectively. The excitation function of the 208Pb(64Ni,n)271Ds reaction was measured and seven atoms of 271Ds were produced. This result was used to estimate the optimum beam energy for the 208Pb(65Cu,n) reaction, and one decay chain of 272-111 was observed. Lastly, the excitation function of the 208Pb(55Mn,n)262Bh reaction was measured and preliminary results will be presented. These results will be characterized in terms of the performance and use of the BGS for heavy element production.
        Cover page: Use of the Berkeley gas-filled separator to study cold fusion reactions leading to the production of elements 110, 111, and 107
        • Article
        • Peer Reviewed
        LBL Publications (2005)

        An attempt to confirm production of superheavy elements in the reaction of 48Ca beams with actinide targets has been performed using the 238U(48Ca,3n)283112 reaction. Two 48Ca projectile energies were used, that spanned the energy range where the largest cross sections have been reported for this reaction. No spontaneous fission events were observed. No alpha decay chains consistent with either reported or theoretically predicted element 112 decay properties were observed. The cross section limits reached are significantly smaller than the recently reported cross sections.

          Cover page: Attempt to confirm superheavy element production in the 48Ca + 238U reaction
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