Journal article Open Access

Observation of Superheavy Nuclei Produced in the Reaction of K 86 r with P 208 b

Ninov, V.; Gregorich, K. E.; Loveland, W.; Ghiorso, A.; Hoffman, D. C.; Lee, D. M.; Nitsche, H.; Swiatecki, W. J.; Kirbach, U. W.; Laue, C. A.; Adams, J. L.; Patin, J. B.; Shaughnessy, D. A.; Strellis, D. A.; Wilk, P. A.

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<oai_dc:dc xmlns:dc="" xmlns:oai_dc="" xmlns:xsi="" xsi:schemaLocation="">
  <dc:creator>Ninov, V.</dc:creator>
  <dc:creator>Gregorich, K. E.</dc:creator>
  <dc:creator>Loveland, W.</dc:creator>
  <dc:creator>Ghiorso, A.</dc:creator>
  <dc:creator>Hoffman, D. C.</dc:creator>
  <dc:creator>Lee, D. M.</dc:creator>
  <dc:creator>Nitsche, H.</dc:creator>
  <dc:creator>Swiatecki, W. J.</dc:creator>
  <dc:creator>Kirbach, U. W.</dc:creator>
  <dc:creator>Laue, C. A.</dc:creator>
  <dc:creator>Adams, J. L.</dc:creator>
  <dc:creator>Patin, J. B.</dc:creator>
  <dc:creator>Shaughnessy, D. A.</dc:creator>
  <dc:creator>Strellis, D. A.</dc:creator>
  <dc:creator>Wilk, P. A.</dc:creator>
  <dc:description>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 ( Eα≥10MeV) 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 2.2−0.8+2.6pb.</dc:description>
  <dc:title>Observation of Superheavy Nuclei Produced in the Reaction of K 86 r with P 208 b</dc:title>
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