Oganesson element12/5/2023 ![]() Advances in experimental techniques will allow studies on isotopes produced significantly below the 1 pb level. The possibility that the limits of nuclear structure studies can be pushed more » even further in mass and charge has greatly motivated a number of new facilities. The prospects are bright: new isotopes are awaiting discovery, completing the landscape of superheavy nuclei and bridging the currently existing gap between nuclei synthesized in cold fusion reactions and those from 48Ca induced fusion reactions. The contributions detail the status of the field and lay out perspectives for the future. Reflecting the breadth of research opportunities in the field of superheavy element research, this special issue covers the range of topics in a comprehensive way, including synthesis of superheavy isotopes, nuclear structure, atomic shell structure, and chemical properties. The use of Q α values in the identification of new superheavy nuclei will benefit greatly from progress in developing both new spectroscopic-quality EDFs and more sophisticated statistical techniques of uncertainty quantification. Unfortunately, this identification method is not projected to work well in the region of deformed-to-spherical shape transition as one approaches N = 184. Conclusions The robustness of DFT predictions for well-deformed superheavy nuclei supports the idea of using experimental Q α values, together with theoretical predictions, as reasonable ( Z, A) indicators. In particular, our models underestimate Q α for the heaviest nucleus 294Og. For transitional nuclei beyond Ds, intermodel differences grow, resulting in an appreciable systematic error. For well-deformed nuclei between Fm and Ds, we find excellent consistency between different model predictions, and a good agreement with experimental results. Results: We investigated the Q αvalues for even-even nuclei from Fm to Z = 120. To estimate systematic model uncertainties, we employ uniform model averaging. Methods: We use nuclear superfluid density functional more » theory (DFT) with several Skyrme energy density functionals (EDFs). Our quantified results will also serve as a benchmark for future, more sophisticated statistical studies. Purpose: This work aims to analyze several models, compare their predictions to available experimental data, and study their performance for the unobserved α-decay chains of 296120, which are of current experimental interest. While many Q α predictions are available, little is known about their uncertainties, and this makes it difficult to carry out extrapolations to as-yet-unknown systems. (LLNL), Livermore, CA (United States) Michigan State Univ., East Lansing, MI (United States) Sponsoring Org.: USDOE National Nuclear Security Administration (NNSA) OSTI Identifier: 1513128 Alternate Identifier(s): OSTI ID: 1491614 OSTI ID: 1513815 Report Number(s): LLNL-JRNL-757240 Journal ID: ISSN 0034-6861 RMPHAT 944846 Grant/Contract Number: AC52-07NA27344 NA0002847 SC0013365 SC0018083 NA0003885 Resource Type: Journal Article: Accepted Manuscript Journal Name: Reviews of Modern Physics Additional Journal Information: Journal Volume: 91 Journal Issue: 1 Journal ID: ISSN 0034-6861 Publisher: American Physical Society (APS) Country of Publication: United States Language: English Subject: 73 NUCLEAR PHYSICS AND RADIATION = ,īackground: New superheavy nuclei are often identified through their characteristic α -decay energies, which requires accurate calculations of Q α values. ![]() Publication Date: Research Org.: Lawrence Livermore National Lab. Centre for Theoretical Chemistry and Physics, The New Zealand Inst. GSI Helmholzzentrum für Schwerionenforschung, Darmstadt (Germany) Technische Univ.India and Homi Bhabha National Institute, Mumbai (India). ![]() ![]() of of Physics and Astronomy and FRIB Lab. Michigan State Univ., East Lansing, MI (United States). ![]()
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