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Observation of Superheavy Nuclei Produced in the Reaction of K86r with P208b

V. Ninov, K. E. Gregorich, W. Loveland, A. Ghiorso, D. C. Hoffman, D. M. Lee, H. Nitsche, W. J. Swiatecki, U. W. Kirbach, C. A. Laue, J. L. Adams, J. B. Patin, D. A. Shaughnessy, D. A. Strellis, and P. A. Wilk
Phys. Rev. Lett. 83, 1104 – Published 9 August 1999; Retraction Phys. Rev. Lett. 89, 039901 (2002)
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Abstract

This article has been retracted: see Phys. Rev. Lett. 89, 039901 (2002)

Following a prediction by Smolańczuk [Phys. Rev. C 59, 2634 (1999)], we searched for superheavy element formation in the bombardment of 208Pb with 449-MeV 86Kr ions. We have observed three decay chains, each consisting of an implanted heavy atom and six subsequent α decays, correlated in time and position. In these decay chains, a rapid (ms) sequence of high energy α particles ( Eα10MeV) indicates the decay of a new high- Z element. The observed chains are consistent with the formation of 129318 and its decay by sequential α-particle emission to 128916, 128514, 128112, 127710, 273Hs ( Z=108) and 269Sg ( Z=106). The production cross section is 2.20.8+2.6pb.

  • Received 27 May 1999

DOI:https://doi.org/10.1103/PhysRevLett.83.1104

©1999 American Physical Society

Erratum

Editorial Note: Observation of Superheavy Nuclei Produced in the Reaction of K86r with P208b [Phys. Rev. Lett. 83, 1104 (1999)]

V. Ninov, K. E. Gregorich, W. Loveland, A. Ghiorso, D. C. Hoffman, D. M. Lee, H. Nitsche, W. J. Swiatecki, U. W. Kirbach, C. A. Laue, J. L. Adams, J. B. Patin, D. A. Shaughnessy, D. A. Strellis, and P. A. Wilk
Phys. Rev. Lett. 89, 039901 (2002)

Authors & Affiliations

V. Ninov1, K. E. Gregorich1, W. Loveland2, A. Ghiorso1, D. C. Hoffman1,3, D. M. Lee1, H. Nitsche1,3, W. J. Swiatecki1, U. W. Kirbach1, C. A. Laue1, J. L. Adams1,3, J. B. Patin1,3, D. A. Shaughnessy1,3, D. A. Strellis1, and P. A. Wilk1,3

  • 1Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
  • 2Department of Chemistry, Oregon State University, Corvallis, Oregon 97331
  • 3Department of Chemistry, University of California, Berkeley, California 94720

See Also

Two New Elements

Phys. Rev. Focus 4, 8 (1999)

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Vol. 83, Iss. 6 — 9 August 1999

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