Abstract

Experiment aiming at the synthesis of heavy isotopes of Z=118 (Og) using beam of 48Ca and a target of 249-251Cf was undertaken in October 2015 – April 2016 employing the Dubna Gas-Filled Recoil Separator (FLNR JINR). The target of mixed isotopes of 249-251Cf (50.7% of 249Cf, 12.9% of 250Cf, and 36.4% of 251Cf) was irradiated by 48Ca ions at two beam energies of 252 and 258 MeV with the corresponding accumulated beam doses of 1.6×1019 and 1.1×1019. A single event observed at lower beam energy was assigned to the isotope 294Og, the product of the reaction 249Cf(48Ca, 3n); its decay pattern and the observed radioactive properties of the nuclides in the decay chain reproduce in full those observed for 294Og in our earlier experiments of 2002-2005 and 2012. At higher beam energy we observed no decay chains that could be attributed to the isotopes of Og. The possibility of renewal of this experiment in the future is discussed.

Details

Title
Study of the 249-251Cf + 48Ca reactions: recent results and outlook
Author
Voinov, A A 1 ; Oganessian, Yu Ts 1 ; F Sh Abdullin 1 ; Brewer, N T 2 ; Dmitriev, S N 1 ; Grzywacz, R K 3 ; Hamilton, J H 4 ; Itkis, M G 1 ; Miernik, K 5 ; Polyakov, A N 1 ; Roberto, J B 6 ; Rykaczewski, K P 2 ; Sabelnikov, A V 1 ; Sagaidak, R N 1 ; Shirokovsky, I V 1 ; Shumeiko, M V 1 ; Stoyer, M A 7 ; Subbotin, V G 1 ; Sukhov, A M 1 ; Tsyganov, Yu S 1 ; Utyonkov, V K 1 ; Vostokin, G K 1 

 FLNR, JINR, 141980 Dubna, Russian Federation 
 Dep. of Phys. and Astron., ORNL, Oak Ridge, TN 37831, USA 
 Dep. of Phys. and Astron., ORNL, Oak Ridge, TN 37831, USA; Dep. of Phys. and Astron., UT, Knoxville, TN 37996, USA 
 Dep. of Phys. and Astron., VU, Nashville, TN 37235, USA 
 Dep. of Phys. and Astron., ORNL, Oak Ridge, TN 37831, USA; Faculty of Physics, UW, Warsaw, Poland 
 Sci. and Tech. Partnerships Directorate, ORNL, Oak Ridge, TN 37831, USA 
 Nucl. and Chem. Sci. Division, LLNL, Livermore, CA 94551, USA 
Publication year
2018
Publication date
Feb 2018
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2572050776
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.