Superheavy Elements: A Crossroads

  title={Superheavy Elements: A Crossroads},
  author={Glenn Theodore Seaborg and W. Loveland and David J. Morrissey},
  pages={711 - 717}
The failure to synthesize superheavy elements by using complete fusion reactions is most likely understandable in terms of the low survival probabilities of the superheavy precursors formed in these reactions or (in some cases) the failure to achieve complete fusion. Further attempts to synthesize these elements by using complete fusion or deep inelastic transfer reactions, or both, are discussed in light of these results. 
Synthesis of Superheavy Elements
The Island of Stability of spherical superheavy nuclides exists at the extreme limit of the Chart of the Nuclides, beyond regions of nuclear stability associated with deformed nuclear shapes. In this
Superheavy-element research
The existence of an island of relatively stable elements beyond the present Periodic Table has been predicted by theoretical extrapolations of nuclear properties. During the past 12 years vigorous
A new hypothesis for the existence of superheavy elements in the earth"s crust
In a new hypothesis the existence of superheavy elements (SHE) in the earth"s crust that decays by spontaneous fission into two unequal fragments around 50 and 230 is postulated. Several phenomena
Historical Reminiscences: The Pioneering Years of Superheavy Element Research
This chapter deals with the pioneering years of superheavy element research, from the mid 1960s to the mid 1980s. The prediction that superheavy nuclides could form an island around element 114 with
Production and Identification of Transactinide Elements
Microscopic nuclear theories predict a region of superheavy elements (SHEs) at the next doubly magic shell closure above 208Pb. Early models locate the shell closure at Z = 114,more recent
Chemistry of superheavy elements.
These results place the architecture of the far-end of the Periodic Table on the test bench and probe the increasingly strong relativistic effects that influence the chemical properties there.
Chemistry of superheavy elements
  • M. Schädel
  • Physics
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2015
A test bench is established to challenge the validity and predictive power of modern fully relativistic quantum chemical models and to probe ‘relativistically’ influenced chemical properties and the architecture of the periodic table at its farthest reach.


Search for long-lived superheavy elements in the reaction of136Xe with238U
A search with radiochemical methods for long-lived superheavy elements in 238U targets bombarded with intense beams of136Xe ions produced negative results. A formation cross section of ≤1×10−35 cm2
Comments on Primordial Superheavy Elements
A Woods-Saxon potential which reproduces the single particle levels in the lead region provides the basis for a discussion of the stability properties of nuclei in the superheavy region. A closed
This article pertains to the most newly-discovered and most sensational mode of transmutation, in which the entry of a neutron into a massive atom-nucleus brings about an internal explosion in which
Search for Superheavy Elements in the Bombardment of Cm-248 with Ca-48
We have searched for superheavy elements 110 to 116 with half-lives between ${10}^{4}$ and ${10}^{8}$ s in fractions chemically separated after each of a series of bombardments of $^{248}\mathrm{Cm}$
Theoretical Estimates of Spontaneous-Fission Half-Lives for Superheavy Elements Based on the Modified-Oscillator Model
The stability problem for the superheavy elements has been reconsidered based on the use of the shape-dependent droplet model and the modified-oscillator potential. The effect of axial asymmetry on