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Toward the Discovery of New Elements: Production of Livermorium (𝑍 = 116) with 50Ti

Journal Article · · Physical Review Letters
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  1. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. Lund University (Sweden); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  3. San Jose State University, CA (United States)
  4. Université de Strasbourg (France)
  5. University of Liverpool (United Kingdom)
  6. Oregon State University, Corvallis, OR (United States)
  7. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  8. Texas A&M University, College Station, TX (United States)
  9. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)
  10. Lund University (Sweden)
  11. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  12. Argonne National Laboratory (ANL), Argonne, IL (United States)
  13. University of Manchester (United Kingdom)
  14. ETH Zürich (Switzerland); Paul Scherrer Institute (Switzerland)
  15. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
+ Show Author Affiliations
The 244Pu ⁢(50 Ti ,𝑥⁢𝑛)⁢ 294−𝑥Lv reaction was investigated at Lawrence Berkeley National Laboratory’s 88-Inch Cyclotron. The experiment was aimed at the production of a superheavy element with 𝑍 ≥114 by irradiating an actinide target with a beam heavier than 48Ca. Produced Lv ions were separated from the unwanted beam and nuclear reaction products using the Berkeley Gas-filled Separator and implanted into a newly commissioned focal-plane detector system. Two decay chains were observed and assigned to the decay of 290Lv . The production cross section was measured to be 𝜎prod = 0.44($$^{+0.58}_{−0.28}$$) pb at a center-of-target center-of-mass energy of 220(3) MeV. Furthermore, this represents the first published measurement of the production of a superheavy element near the “island of stability,” with a beam of 50Ti and is an essential precursor in the pursuit of searching for new elements beyond 𝑍 =118.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Texas A&M University, College Station, TX (United States)
Sponsoring Organization:
Carl Trygger Foundation; Oregon State University; Royal Physiographic Society in Lund; Swedish Knut and Alice Wallenberg Foundation; Swiss National Science Foundation; UK Science and Technology Facilities Council; USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Nuclear Physics (NP); USNRC; Wenner-Gren Foundations
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357; AC05-00OR22725; AC52-07NA27344; FG02-93ER40773
OSTI ID:
3000276
Alternate ID(s):
OSTI ID: 2474515
OSTI ID: 2478347
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 133; ISSN 1079-7114; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (62)

Some remarks on the error analysis in the case of poor statistics journal February 1984
A new test for random events of an exponential distribution journal July 2000
Systematics on production of superheavy nuclei $$Z = 119-122$$ in fusion-evaporation reactions journal September 2021
Closed shells for Z > 82 and N > 126 in a diffuse potential well journal September 1966
On the nuclear structure and stability of heavy and superheavy elements journal June 1969
Nuclear properties according to the Thomas-Fermi model journal May 1996
Nuclear masses and deformations journal June 1966
Shell structure of the superheavy elements journal December 1996
Simulation of recoil trajectories in gas-filled magnetic separators journal May 2013
The Lund–York–Cologne Calorimeter (LYCCA): Concept, design and prototype developments for a FAIR-NUSTAR detector system to discriminate relativistic heavy-ion reaction products
  • Golubev, P.; Wendt, A.; Scruton, L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 723 https://doi.org/10.1016/j.nima.2013.04.058
journal September 2013
Next generation ECR ion sources: First results of the superconducting 28GHz ECRIS – VENUS
  • Leitner, D.; Lyneis, C. M.; Abbott, S. R.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 235, Issue 1-4 https://doi.org/10.1016/j.nimb.2005.03.230
journal July 2005
SRIM – The stopping and range of ions in matter (2010)
  • Ziegler, James F.; Ziegler, M. D.; Biersack, J. P.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 11-12 https://doi.org/10.1016/j.nimb.2010.02.091
journal June 2010
Heavy element research at Dubna journal April 2004
Magic numbers for superheavy nuclei in relativistic continuum Hartree–Bogoliubov theory journal May 2005
Calculation of evaporation residue cross sections for the synthesis of superheavy nuclei in hot fusion reactions journal July 2013
Cross sections for the production of superheavy nuclei journal December 2015
Description of structure and properties of superheavy nuclei journal January 2007
Shape coexistence and triaxiality in the superheavy nuclei journal February 2005
The quest for superheavy elements and the limit of the periodic table journal December 2023
Nondestructive synchronous beam current monitor journal December 2014
Single radio frequency bucket injection in the 88-Inch Cyclotron using a pulsed high voltage chopper journal January 2024
Super-heavy nuclei journal October 2015
Superheavy nuclei: from predictions to discovery journal January 2017
Predictions of identification and production of new superheavy nuclei with Z=119 and 120 journal March 2020
Search for elements 119 and 120 journal December 2020
Predictions for the synthesis of the Z=119 superheavy element journal May 2022
Investigation of Ca48 -induced reactions with Pu242 and U238 targets at the JINR Superheavy Element Factory journal August 2022
Predictions for the synthesis of the Z=120 superheavy element journal September 2022
Spectroscopy along flerovium decay chains. III. Details on experiment, analysis, Cn282 , and spontaneous fission branches journal February 2023
Possibility to synthesize Z=120 superheavy nuclei with Z>20 projectiles journal July 2023
Predictions of synthesizing elements with Z=119 and 120 in fusion reactions journal January 2024
Shell structure of superheavy nuclei in self-consistent mean-field models journal August 1999
Shell corrections of superheavy nuclei in self-consistent calculations journal February 2000
Measurements of cross sections for the fusion-evaporation reactions Pu 244 ( Ca 48 , x n ) 292 − x 114 and Cm 245 ( Ca 48 , x n ) 293 − x 116 journal May 2004
Measurements of cross sections and decay properties of the isotopes of elements 112, 114, and 116 produced in the fusion reactions U 233 , 238 , Pu 242 , and Cm 248 + Ca 48 journal December 2004
Attempt to confirm superheavy element production in theCa48+U238reaction journal July 2005
Synthesis of the isotopes of elements 118 and 116 in the Cf 249 and Cm 245 + Ca 48 fusion reactions journal October 2006
Synthesis of superheavy nuclei: A search for new production reactions journal September 2008
Attempt to produce element 120 in the Pu 244 + Fe 58 reaction journal February 2009
Role of the coupling between neck and radial degrees of freedom in evolution from dinucleus to mononucleus journal April 2011
First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the Pu 244 ( Ca 48 ,3-4 n ) reaction journal May 2011
Effects of the entrance channel and fission barrier in the synthesis of superheavy element Z = 120 journal October 2011
Systematics of fusion probability in “hot” fusion reactions journal December 2011
Influence of proton shell closure on production and identification of new superheavy nuclei journal January 2012
Theoretical study of the synthesis of superheavy nuclei with Z = 119 and 120 in heavy-ion reactions with trans-uranium targets journal April 2012
Predictions of the fusion-by-diffusion model for the synthesis cross sections of Z = 114 –120 elements based on macroscopic-microscopic fission barriers journal July 2012
Possibility to produce element 120 in the 54 Cr+ 248 Cm hot fusion reaction journal March 2013
Production cross sections of superheavy elements Z = 119 and 120 in hot fusion reactions journal February 2014
Independent Verification of Element 114 Production in the Ca 48 + Pu 242 Reaction journal September 2009
New Superheavy Element Isotopes: Pu 242 ( Ca 48 , 5 n ) 1 285 14 journal October 2010
Production and Decay of the Heaviest Nuclei 1 293 , 294 17 and 1 294 18 journal October 2012
Predominance of Triaxial Shapes in Transitional Super-Heavy Nuclei: Ground-State Deformation and Shape Coexistence along the Flerovium ( Z = 114 ) Chain of Isotopes journal November 2020
Spectroscopy along Flerovium Decay Chains: Discovery of Ds 280 and an Excited State in Cn 282 journal January 2021
New results on elements 111 and 112 journal June 2002
Feature of production of new superheavy nuclei in actinide-based complete-fusion reactions journal June 2009
Review of even element super-heavy nuclei and search for element 120 journal June 2016
Some critical remarks on a sequence of events interpreted to possibly originate from a decay chain of an element 120 isotope journal June 2017
Actinide targets for the synthesis of superheavy nuclei journal December 2023
Progress on production cross-sections of unknown nuclei in fusion evaporation reactions and multinucleon transfer reactions journal January 2023
Experiment on the Synthesis of Element 113 in the Reaction 209 Bi( 70 Zn,n) 278 113 journal October 2004
New Result in the Production and Decay of an Isotope, 278 113, of the 113th Element journal October 2012
Names and symbols of the elements with atomic numbers 113, 115, 117 and 118 (IUPAC Recommendations 2016) journal December 2016

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