New Superheavy Element Isotopes:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Pu</mml:mi><mml:mprescripts /><mml:none /><mml:mn>242</mml:mn></mml:mmultiscripts><mml:mo stretchy="false">(</mml:mo><mml:mmultiscripts><mml:mi>Ca</mml:mi><mml:mprescripts /><mml:none /><mml:mn>48</mml:mn></mml:mmultiscripts><mml:mo>,</mml:mo><mml:mn>5</mml:mn><mml:mi>n</mml:mi><mml:mo stretchy="false">)</mml:mo><mml:mmultiscripts><mml:mn>1</mml:mn><mml:mprescripts /><mml:non

Ellison, Paul A.; Gregorich, Κ. Ε.; Berryman, J. S.; Bleuel, D. L.; Clark, R. M.; Dragojević, I.; Dvořák, J.; Fallon, P.; Fineman-Sotomayor, Carolina; Gates, J. M.; Gothe, Oliver; Lee, I‐Yang; Loveland, W.; McLaughlin, Joseph; Paschalis, S.; Petri, M.; Qian, J.; Stavsetra, L.; Wiedeking, M.; Nitsche, H.

doi:10.1103/physrevlett.105.182701

Cited by 183 publications

(80 citation statements)

References 18 publications

(18 reference statements)

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“…These nuclei as well as those produced as descendants in the α-decay chain have relatively larger number of neutrons. Recently, other laboratories than FLNR also performed experiments of hot fusion reactions and obtained results that are consistent with the data by FLNR [6][7][8][9]. At present, attempts to produce elements 119 and 120 are made or planed in several facilities using actinide targets.…”

Section: Introductionsupporting

confidence: 54%

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Dynamical approach to heavy-ion induced fission using actinide target nuclei at energies around the Coulomb barrier

et al. 2012

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In order to describe heavy-ion fusion reactions around the Coulomb barrier with an actinide target nucleus, we propose a model which combines the coupled-channels approach and a fluctuationdissipation model for dynamical calculations. This model takes into account couplings to the collective states of the interacting nuclei in the penetration of the Coulomb barrier and the subsequent dynamical evolution of a nuclear shape from the contact configuration. In the fluctuation-dissipation model with a Langevin equation, the effect of nuclear orientation at the initial impact on the prolately deformed target nucleus is considered.

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Section: Introductionsupporting

confidence: 54%

“…In the dynamical calculation, we use an angle independent potential energy surface, but starting from the angle dependent initial touching distance given by Eq. (8). With this prescription, we can for the first time extend the dynamical Langevin calculation down to the subbarrier region.…”

Section: Modelmentioning

confidence: 99%

Dynamical approach to heavy-ion induced fission using actinide target nuclei at energies around the Coulomb barrier

et al. 2012

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“…Results from a 48 Ca on 238 U experiment at SHIP [34] support data about the synthesis and decay of 3.8-s 283 Cn [35]. The synthesis of the most neutron-deficient know isotope of element 114, 285 114 (T 1/2 ≈ 0.1 s) [36], was achieved in an experiment at the Berkeley Gas-filled Separator (BGS). Recently, exciting news came from an experiment at GSI's gas-filled separator named TransActinide Separator and Chemistry Apparatus (TASCA).…”

Section: Introduction and Historical Remarksmentioning

confidence: 80%

Chemistry of superheavy elements

Schädel

2012

Radiochimica Acta

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Summary. The chemistry of superheavy elements -or transactinides from their position in the Periodic Table -is summarized. After giving an overview over historical developments, nuclear aspects about synthesis of neutron-rich isotopes of these elements, produced in hot-fusion reactions, and their nuclear decay properties are briefly mentioned. Specific requirements to cope with the one-atom-at-a-time situation in automated chemical separations and recent developments in aqueous-phase and gas-phase chemistry are presented. Exciting, current developments, first applications, and future prospects of chemical separations behind physical recoil separators ("pre-separator") are discussed in detail. The status of our current knowledge about the chemistry of rutherfordium (Rf, element 104), dubnium (Db, element 105), seaborgium (Sg, element 106), bohrium (Bh, element 107), hassium (Hs, element 108), copernicium (Cn, element 112), and element 114 is discussed from an experimental point of view. Recent results are emphasized and compared with empirical extrapolations and with fully-relativistic theoretical calculations, especially also under the aspect of the architecture of the Periodic Table.

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“…The solid angle is 13.3 msr [49], which is significantly larger than, e.g., the 10 msr of the Dubna Gas-Filled Recoil Separator (DGFRS). The efficiency of TASCA for actinide-target based 48 Cainduced fusion reactions [50,51] is roughly 50% larger than that of the DGFRS and approaches the best values reported from the BGS [52]. TASCA thus combines the advantages of these two separators, i.e., the large transmission of the BGS and the small dispersion of the DGFRS.…”

Section: Formation Of the Community Building And Commissioning Of Tascamentioning

confidence: 85%

Superheavy element studies with preseparated isotopes

Düllmann¹

2011

Radiochimica Acta

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Superheavy elements / Transactinides / Physical preseparation / Recoil separatorSummary. In recent years, significant progress in the field of superheavy element research has been achieved thanks to a novel combination of techniques from different fields. This "physical preseparation" approach includes the coupling of an ancillary setup -typically a chemistry apparatus or a counting setup -to a physical recoil separator. This latter preseparator removes unwanted nuclear reaction products as well as the intense heavy-ion beam associated with superheavy element experiments and thus isolates the evaporation residues of the nuclear fusion reactions. These are guided to the separators's focal plane, where they are extracted and available for further transport to external setups, e.g., by a gas-jet. In this overview, the development of physical preseparation is described, and experimental results from nuclear chemistry and physics that were achieved with "preseparated" isotopes are summarized, with an emphasis on results relevant for superheavy element research. The covered topics range from chemical studies in the liquid as well as in the gas phase, the measurement of nuclear decay properties and of atomic masses. Preseparation was already shown to be a very powerful approach in these studies and promises to allow further progress in superheavy element research.

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New Superheavy Element Isotopes:Pu242(Ca48,5n)1

Cited by 183 publications

References 18 publications

Dynamical approach to heavy-ion induced fission using actinide target nuclei at energies around the Coulomb barrier

Dynamical approach to heavy-ion induced fission using actinide target nuclei at energies around the Coulomb barrier

Chemistry of superheavy elements

Superheavy element studies with preseparated isotopes

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