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

2004/05/17 by Yu. Ts. Oganessian, V. K. Utyonkov, Yu. V. Lobanov +24 · 6 citations
Physics and Astronomy · #Nuclear physics research studies #Astronomical and nuclear sciences #Rare-earth and actinide compounds

paper · pdf · doi:10.1103/physrevc.69.054607

openalex publication_date 2004/05/17 · openalex created_date 2017/03/23 · openalex updated_date 2026/08/01

Abstract

We have studied the excitation functions of the reactions ²⁴⁴Pu(⁴⁸Ca,xn). Maximum cross sections for the evaporation of 3--5 neutrons in the complete-fusion reaction ²⁴⁴Pu+⁴⁸Ca were measured to be \ensuremathσ_3n=2\phantom\rule0.3em0expb, \ensuremathσ_4n=5\phantom\rule0.3em0expb, and \ensuremathσ_5n=1\phantom\rule0.3em0expb. The decay properties of 3n-evaporation product ²⁸⁹114, in the decay chains observed at low ⁴⁸Ca energy coincide well with those previously observed in the ²⁴⁴Pu+⁴⁸Ca and ²⁴⁸Cm+⁴⁸Ca reactions and assigned to ²⁸⁸114. Two isotopes of element 114 and their descendant nuclei were identified for the first time at higher bombarding energies: ²⁸⁸114 (E_\ensuremathα=9.95\phantom\rule0.3em0exMeV, T_1∕2=0.6\phantom\rule0.3em0exs) and ²⁸⁷114 (E_\ensuremathα=10.04\phantom\rule0.3em0exMeV, T_1∕2=1\phantom\rule0.3em0exs). We also report on the observation of new isotopes of element 116, ^290,291116, produced in the ²⁴⁵Cm+⁴⁸Ca reaction with cross sections of about 1\phantom\rule0.3em0expb. A discussion of self-consistent interpretations of all observed decay chains originating at Z=118, 116, and 114 is presented.

Citations

• Synthesis of nuclei of the superheavy element 114 in reactions induced by 48Ca
• The discovery of the heaviest elements
• Observation of the decay of292116
• Synthesis of Superheavy Nuclei in the48Ca<mml:mspace/>+244PuReaction

Cited by

• Synthesis of the isotope282113in theNp<mml:mprescripts/><mml:none/>237+Ca<mml:mprescripts/><mml:none/>48fusion reaction
• Darmstadtium [wikipedia]
• Flerovium [wikipedia]
• Isotopes of darmstadtium [wikipedia]
• Isotopes of hassium [wikipedia]
• Nihonium [wikipedia]