Synthesis of Superheavy Nuclei in the 48Ca+244Pu Reaction

Yu. Ts. Oganessian, V. K. Utyonkov, Yu. V. Lobanov, F. Sh. Abdullin, A. N. Polyakov, I. V. Shirokovsky, Yu. S. Tsyganov, G. G. Gulbekian, S. L. Bogomolov, B. N. Gikal, A. N. Mezentsev, S. Iliev, V. G. Subbotin, A. M. Sukhov, G. V. Buklanov, K. Subotic, M. G. Itkis, K. J. Moody, J. F. Wild, N. J. Stoyer, M. A. Stoyer, and R. W. Lougheed
Phys. Rev. Lett. 83, 3154 – Published 18 October 1999
PDFExport Citation

Abstract

In bombardment of 244Pu with 48Ca, we observed a decay sequence consisting of an implanted heavy atom, three subsequent α decays, and a spontaneous fission (SF), all correlated in time and position. The measured α energies and corresponding time intervals were Eα=9.71 MeV ( Δt=30.4 s), 8.67 MeV ( Δt=15.4 min), and 8.83 MeV ( Δt=1.6 min); for the SF ( Δt=16.5 min), the total deposited energy was approximately 190 MeV. The α-particle energies together with the decay times and SF terminating the chain offer evidence of the decay of nuclei with high atomic numbers. This decay chain is a good candidate for originating from the α decay of the parent nucleus 289114, produced with a cross section of about 1 pb.

  • Received 8 March 1999

DOI:https://doi.org/10.1103/PhysRevLett.83.3154

©1999 American Physical Society

Authors & Affiliations

Yu. Ts. Oganessian, V. K. Utyonkov, Yu. V. Lobanov, F. Sh. Abdullin, A. N. Polyakov, I. V. Shirokovsky, Yu. S. Tsyganov, G. G. Gulbekian, S. L. Bogomolov, B. N. Gikal, A. N. Mezentsev, S. Iliev, V. G. Subbotin, A. M. Sukhov, G. V. Buklanov, K. Subotic, and M. G. Itkis

  • Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation

K. J. Moody, J. F. Wild, N. J. Stoyer, M. A. Stoyer, and R. W. Lougheed

  • University of California, Lawrence Livermore National Laboratory, Livermore, California 94551

References (Subscription Required)

Click to Expand
Issue

Vol. 83, Iss. 16 — 18 October 1999

Reuse & Permissions
Access Options

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×