Synthesis of nuclei of the superheavy element 114 in reactions induced by 48Ca

@article{Oganessian1999SynthesisON,
  title={Synthesis of nuclei of the superheavy element 114 in reactions induced by 48Ca},
  author={Yu. Ts. Oganessian and A. V. Yeremin and Andrey Popeko and S. L. Bogomolov and G. V. Buklanov and Maxim Chelnokov and V. I. Chepigin and Boris N. Gikal and V. A. Gorshkov and Georgij G. Gulbekian and Mikhail G. Itkis and A. P. Kabachenko and Anatoliy Lavrentev and O. N. Malyshev and Jakub Roh{\'a}{\vc} and Roman N. Sagaidak and Sigurd Hofmann and {\vS}. {\vS}{\'a}r{\'o} and Giorgio Giardina and Kosuke Morita},
  journal={Nature},
  year={1999},
  volume={400},
  pages={242-245}
}
The stability of heavy nuclides, which tend to decay by α-emission and spontaneous fission, is determined by the structural properties of nuclear matter. Nuclear binding energies and lifetimes increase markedly in the vicinity of closed shells of neutrons or protons (nucleons), corresponding to ‘magic’ numbers of nucleons; these give rise to the most stable (spherical) nuclear shapes in the ground state. For example, with a proton number of Z = 82 and a neutron number of N = 126, the nucleus… Expand
Nuclei at the Borderline of Their Existence
Throughout the 60 years that have passed since the discovery of the first man-made elements, neptunium and plutonium, investigations in the field of synthesis of new elements and of their propertiesExpand
Towards the ``islands of stability'' of superheavy elements
Abstract For the 60 yr that have passed since the discovery of the first artificial elements Np and Pu investigations of the properties of new elements have become one of the most quickly developingExpand
Relativistic Quantum Chemistry of the Superheavy Elements. Closed-Shell Element 114 as a Case Study
The synthesis of the latest (proton-even) superheavy elements 114, 116, and 118 have been reported recently by the Dubna and Lawrence-Berkeley groups. However, the unambiguous identification of theseExpand
Synthesis and Identification of Superheavy Elements in Reactions with 48Ca Beams
For the identification of new nuclides undergoing α decay a method for the investigation of consistent α decays, the socalled α-α correlation analysis, has been employed since mid60ties. This methodExpand
TOPICAL REVIEW: Heaviest nuclei from 48 Ca-induced reactions
After a brief introduction of the role of shell effects in determining the limiting nuclear masses, the experimental investigation of the decay properties of the heaviest nuclei is presented. For theExpand
Ternary Fission Mass Distributions of Superheavy Nuclei Within a Statistical Model
Theoretical models predict the existence of an island of stability at the proton shell closures Z = 114 or 120 or 126 and at the neutron shell closure N = 184 due to the microscopic shell effects. InExpand
Systematic Study on Alpha Decay Half-Lives of Superheavy Nuclei
The α-decay half-lives of a set of superheavy nuclear isotope chain from Z = 105 to 120 have been analyzed systematically within the WKB method, and some nuclear structure features are found. TheExpand
Towards the Structure of the Heaviest Nuclei
TLDR
In-beam gamma-ray spectroscopy has enabled the rotational behaviour of the even-even nuclei 252,254No to be studied up to spin 20ħ and in these experiments the reaction products, although populated with small cross sections, have been separated from the dominant fission background. Expand
Alpha decay properties of superheavy nuclei Z = 126
Abstract We have studied the possible isotopes of superheavy nuclei Z = 126 in the range 288 ≤ A ≥ 339 by studying through their α-decay properties. α-Decay half-life for the isotopes of Z = 126Expand
Unexpected inhibition of fusion in nucleus–nucleus collisions
TLDR
Measurements of three fusion reactions with Z1Z2 around half this value find convincing model-independent evidence both of inhibition of fusion, and of the presence of quasi-fission, which defy interpretation within the standard picture of nuclear fusion and fission. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 17 REFERENCES
Properties of the hypothetical spherical superheavy nuclei
Theoretical results on the ground-state properties of the hypothetical spherical superheavy atomic nuclei are presented and discussed. Even-even isotopes of elements Z=104{minus}120 are considered.Expand
Extremes of nuclear structure
With the advent of medium and large gamma detector arrays, it is now possible to look at nuclear structure at high rotational forces. The role of pairing correlations and their eventual breakdown,Expand
Nuclear properties for astrophysical and radioactive-ion-beam applications
Abstract We tabulate the ground-state odd-proton and odd-neutron spins and parities, proton and neutron pairing gaps, one- and two-neutron separation energies, quantities related to β -delayed one-Expand
Chemical properties of element 106 (seaborgium)
The synthesis, via nuclear fusion reactions, of elements heavier than the actinides, allows one to probe the limits of the periodic table as a means of classifying the elements. In particular,Expand
Search for new isotopes of element 112 by irradiation of 238U with 48Ca
Abstract: The reaction 48Ca+238U was investigated at the recoil separator VASSILISSA at the Flerov Laboratory of Nuclear Reactions, JINR Dubna, in attempts to synthesize new isotopes of element 112.Expand
Dynamical hindrance to compound-nucleus formation in heavy-ion reactions☆
Abstract The model of a sharp-surfaced drop with one-body dissipation is used to map out the extra-extra push energy Exx(A1, A2) (i.e. the excess bombarding energy above the Coulomb barrier requiredExpand
Experiments to produce isotopes of superheavy elements with atomic numbers 114–116 in 48Ca ion reactions
Experiments have been performed to synthesize isotopes of elements 114–116 in fusion reactions between 48Ca ions and 246, 248Cm, 243Am and 242Pu target nuclei. The detection of reaction products byExpand
NUCLEAR MASSES AND DEFORMATIONS
Abstract A semi-empirical theory of nuclear masses and deformations is presented. The potential energy of a nucleus, considered as a function of N, Z and the nuclear shape, is assumed to be given byExpand
Attempts to produce superheavy elements by fusion of 48Ca with 248Cm in the bombarding energy range of 4.5-5.2 MeV/u.
A search for superheavy elements was made in bombardments of /sup 248/Cm with /sup 48/Ca ions performed at projectile energies close to the interaction barrier in order to keep the excitation energyExpand
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 $^{248}\mathrm{Cm}$Expand
...
1
2
...