Synthesis of Superheavy Nuclei in the48Ca<mml:mspace/>+244PuReaction

1999/10/18 by Yu. Ts. Oganessian, V. K. Utyonkov, Yu. V. Lobanov +19 · 21 citations
Physics and Astronomy · #Nuclear physics research studies #Astronomical and nuclear sciences #Quantum Chromodynamics and Particle Interactions

paper · doi:10.1103/physrevlett.83.3154

openalex publication_date 1999/10/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

In bombardment of ²⁴⁴Pu with ⁴⁸Ca, we observed a decay sequence consisting of an implanted heavy atom, three subsequent \ensuremathα decays, and a spontaneous fission (SF), all correlated in time and position. The measured \ensuremathα energies and corresponding time intervals were E_\ensuremathα\phantom\rule0ex0ex=\phantom\rule0ex0ex9.71 MeV ( \ensuremathΔt\phantom\rule0ex0ex=\phantom\rule0ex0ex30.4 s), 8.67 MeV ( \ensuremathΔt\phantom\rule0ex0ex=\phantom\rule0ex0ex15.4 min), and 8.83 MeV ( \ensuremathΔt\phantom\rule0ex0ex=\phantom\rule0ex0ex1.6 min); for the SF ( \ensuremathΔt\phantom\rule0ex0ex=\phantom\rule0ex0ex16.5 min), the total deposited energy was approximately 190 MeV. The \ensuremathα-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 \ensuremathα decay of the parent nucleus ²⁸⁹114, produced with a cross section of about 1 pb.

Cited by

• Experimental survey of the production of α-decaying heavy elements in U<mml:mprescripts/><mml:none/>238+Th<mml:mprescripts/><mml:none/>232 reactions at 7.5–6.1 MeV/nucleon
• Potential energy surfaces of Lawrencium and Nobelium dihydrides (LrH2 and NoH2)
• Electronic configurations and the periodic table for superheavy elements
• Synthesis and properties of isotopes of the transactinides
• Copernicium: A Relativistic Noble Liquid
• Evolution of the periodic table through the synthesis of new elements
• Discovery of the element with atomic number 112 (IUPAC Technical Report)
• Synthesis of superheavy nuclei in 48Ca+244Pu interactions
• Confirmation of production of element 110 by the208Pb(64Ni,n)reaction
• Study of the Reaction48Ca +248Cm →296Lv*at RIKEN-GARIS
• α decay half-lives of new superheavy elements
• Search for long lived heaviest nuclei beyond the valley of stability
• Measurements of cross sections for the fusion-evaporation reactionsPu<mml:mprescripts/><mml:none/>244(Ca<mml:mprescripts/><mml:none/>48,xn)292−x114andCm<mml:mprescripts/><mml:none/>245(Ca<mml:mprescripts/><mml:none/>48,xn)293−x116
• Half-life predictions for decay modes of superheavy nuclei
• A Proposed Reaction Channel for the Synthesis of the Superheavy Nucleus Z = 109
• Entrance channels and alpha decay half-lives of the heaviest elements
• Flerovium [wikipedia]
• Island of stability [wikipedia]
• Isotopes of hassium [wikipedia]
• Nihonium [wikipedia]
• Timeline of chemical element discoveries [wikipedia]