Search for elements 119 and 120

Khuyagbaatar, J.; Yakushev, A.; Düllmann, Ch. E.; Ackermann, D.; Andersson, L.-L.; Asai, Mitsuteru; Block, M.; Boll, R. A.; Brand, H.; Cox, D. M.; Dasgupta, M.; Derkx, X.; Nitto, A. Di; Eberhardt, Κ.; Even, J.; Evers, M.; Fahlander, C.; Forsberg, U.; Gates, J. M.; Gharibyan, N.; Golubev, P.; Gregorich, Κ. Ε.; Hamilton, J. H.; Hartmann, W.; Herzberg, R.‐D.; Heßberger, F. P.; Hinde, David; Hoffmann, J.; Hollinger, R.; Hübner, A.; Jäger, E.; Kindler, B.; Kratz, Jens Volker; Krier, J.; Kurz, N.; Laatiaoui, M.; Lahiri, Susanta; Lang, R.; Lommel, B.; Maiti, Moumita; Miernik, K.; Minami, S.; Mistry, A.; Mokry, C.; Nitsche, H.; Omtvedt, J. P.; Pang, G. K.; Papadakis, P.; Renisch, Dennis; Roberto, J. B.; Rudolph, Dirk; Runke, J.; Rykaczewski, K. P.; Sarmiento, Luis; Schädel, M.; Schausten, Β.; Semchenkov, A.; Shaughnessy, D. A.; Steinegger, P.; Steiner, J.; Tereshatov, E. E.; Thörle-Pospiech, P.; Tinschert, K.; Heidenreich, T. Torres De; Trautmann, Ν.; Türler, Α.; Uusitalo, J.; Węgrzecki, M.; Wiehl, N.; Cleve, S. M. Van; Yakusheva, V.

doi:10.1103/physrevc.102.064602

Cited by 56 publications

(24 citation statements)

References 83 publications

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“…Within the so far assigned superheavy nuclei, the decay properties of the N-Z = 59 nuclei are of specific importance and interest, as the acceptance of discovery of elements Z = 117 (tenessine) and Z = 115 (moscovium) is based on them. The heaviest known nucleus of that chain, 293 Ts, was produced by the reaction 249 Bk( 48 Ca,4n) 293 Ts [116,117,118,119,120,121]. A second entry point into this chain is 289 Mc produced in the reaction 243 Am( 48 Ca,2n) 289 Mc [66,122,123].…”

Section: Alpha Decay Chain Of N-z = 59 Nucleimentioning

confidence: 99%

“…The so far published decay data for the members of the N-Z = 59 chain [27] 293 Ts are reported so far, sixteen from experiments at the DGFRS (Dubna) [116,117,119] and two from an experiment at TASCA (GSI) [121]. Evidently only one of the TASCA chains was complete, in the second one the first two members ( 293 Ts, 289 Mc) were missing.…”

Section: Alpha Decay Chain Of N-z = 59 Nucleimentioning

confidence: 99%

“…Zagrebaev and W. Greiner [187] predicted cross sections of σ ≈ 25 fb for 54 Cr( 248 Cm,4n) 298 120 and a slightly higher value of σ ≈ 40 fb for 50 Ti( 249 Cf,3n) 296 120. So far only few experiments on synthesis of element 120 reaching cross sections limits below 1 pb have been performed: 64 Ni + 238 U at SHIP, GSI with σ<0.09 pb [188], 54 Cr + 248 Cm at SHIP, GSI with σ<0.58 pb [97], 50 Ti + 249 Cf at TASCA, GSI with σ<0.2 pb [189], and 58 Fe + 244 U at DGFRS, JINR Dubna with σ<0.5 pb [190].…”

Section: Attempts To Synthesize Elements Z = 119 and Z = 120mentioning

confidence: 99%

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Some Aspects on Identification, Decay Properties and Nuclear Structure of the Heaviest Nuclei

Heßberger¹

2021

Preprint

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Synthesis of new elements at the upper border of the charts of nuclei and investigation of their decay properties and nuclear structure has been one of the main research topics in low energy nuclear physics since more than five decades. Main items are the quest for the heaviest nuclei that can exist and the verification of the theoretical predicted spherical proton and neutron shells at Z = 114, 120 or 126 and N = 172 or 184. The scope of the present paper is to illustrate some technical and physical aspects in investigation of the heaviest nuclei ('superheavy nuclei') and to critical discuss some selected results, which from a strict scientific point of view are not completely clear so far, making partly also suggestions for alternatively interpretations. A complete review of the whole field of superheavy element research, however, is out of the scope of this paper.

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Section: Alpha Decay Chain Of N-z = 59 Nucleimentioning

confidence: 99%

Section: Alpha Decay Chain Of N-z = 59 Nucleimentioning

confidence: 99%

Section: Attempts To Synthesize Elements Z = 119 and Z = 120mentioning

confidence: 99%

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Some Aspects on Identification, Decay Properties and Nuclear Structure of the Heaviest Nuclei

Heßberger¹

2021

Preprint

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“…The former leads to the discoveries of new elements up to Z = 113 and the later for SHN with 113 ≤ Z ≤ 118 so far. Lots of efforts have been made to produce SHN with Z = 119 and Z = 120 [8][9][10][11][12], but there is no evidence for the synthesis of the new elements.…”

Section: Introductionmentioning

confidence: 99%

Microscopic study of the compound nucleus formation in cold-fusion reactions

Sun,

Guo

2022

Preprint

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The understanding of the fusion probability is of particular importance to reveal the mechanism of producing superheavy elements. We present a microscopic study of the compound nucleus formation by combining timedependent density functional theory, coupled-channels approach, and dynamical diffusion models. The fusion probability and compound nucleus formation cross sections for cold-fusion reactions 48 Ca+ 208 Pb, 50 Ti+ 208 Pb, and 54 Cr+ 208 Pb are investigated and it is found that the deduced capture barriers, capture cross sections for these reactions are consistent with experimental data. Above the capture barrier, our calculations reproduce the measured fusion probability reasonably well. Our studies demonstrate that the restrictions from the microscopic dynamic theory improve the predictive power of the coupled-channels and diffusion calculations.

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“…Systematic experimental research performed over the past 30 years has finally led, with the discovery of element 118, oganesson, to the completion of the 7th row of the periodic table [1][2][3][4][5]. Unfortunately, experimental attempts to go beyond Og have not been successful so far [2,[6][7][8][9], mainly due to the extremely low production cross sections. Many theoretical models have been developed aiming at describing the SHN synthesis process (see, e.g.…”

Section: Introductionmentioning

confidence: 99%

The Fusion-by-Diffusion model as a tool to calculate cross sections for the production of superheavy nuclei

Cap¹,

Kowal²,

Siwek-Wilczyńska³

2022

Preprint

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This article summarizes recent progress in our understanding of the reaction mechanisms leading to the formation of superheavy nuclei in cold and hot fusion reactions. Calculations are done within the Fusion-by-Diffusion (FBD) model using the new nuclear data tables by Jachimowicz et al. [At. Data Nucl. Data Tables 138, 101393 (2021)]. The synthesis reaction is treated in a standard way as a threestep process (i.e., capture, fusion, and survival). Each reaction step is analysed separately. Model calculations are compared with selected experimental data on capture, fissionlike and fusion cross sections, fusion probabilities, and evaporation residue excitation functions. The role of the angular momentum in the fusion step is discussed in detail. A set of fusion excitation functions with corresponding fusion probabilities is provided for cold and hot synthesis reactions.

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Search for elements 119 and 120

Cited by 56 publications

References 83 publications

Some Aspects on Identification, Decay Properties and Nuclear Structure of the Heaviest Nuclei

Some Aspects on Identification, Decay Properties and Nuclear Structure of the Heaviest Nuclei

Microscopic study of the compound nucleus formation in cold-fusion reactions

The Fusion-by-Diffusion model as a tool to calculate cross sections for the production of superheavy nuclei

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