Response to the report of the transfermium working group

Armbruster, P.; Heßberger, F. P.; Hofmann, Saskia; Leino, Mauri; Münzenberg, G.; Reisdorf, W.; Schmidt, Karl-Heinrich

doi:10.1016/0146-6410(93)90053-i

Cited by 5 publications

(2 citation statements)

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“…The TWG issued its report 16 in 1992. The contents of the report were accepted, in general, by the Dubna 71 and Darmstadt 72 laboratories, but heavily criticized by the Berkeley group. 73 A concise summary of the developments concerning the discovery of elements 101−111 was published by Greenwood.…”

Section: Transactinidesmentioning

confidence: 99%

Advances in the Production and Chemistry of the Heaviest Elements

2013

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Section: Transactinidesmentioning

confidence: 99%

Advances in the Production and Chemistry of the Heaviest Elements

2013

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“…A report of their extensive work was published by Barber et al (1992) and names were recommended on the basis of this report for the elements 101 to 109 (IUPAC 1994). The proposed list, although attempting to find a compromise, was not accepted in all details by the research groups in Berkeley, Dubna and Darmstadt (Ghiorso and Seaborg 1993, Oganessian and Zvara 1993, Armbruster et al 1993. As a consequence, a new list was created and accepted at the IUPAC General Assembly in August 1997 (IUPAC 1997).…”

Section: History and Names: The Elements Up To Meitneriummentioning

confidence: 99%

New elements - approaching

Hofmann¹

1998

Rep. Prog. Phys.

385

219

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The search for new elements is part of the broader field of investigations of nuclei at the limits of stability. In two series of experiments at SHIP, six new elements (Z = 107-112) were synthesized via fusion reactions using 1n-deexcitation channels and lead or bismuth targets. The isotopes were unambiguously identified by means of α-α correlations. Alpha decay, not fission, is the dominant decay mode. The collected decay data establish a means of comparison with theoretical data. This aids in the selection of appropriate models that describe the properties of known nuclei. Predictions based on these models are useful in the preparation of the next generation of experiments. Cross sections decrease by two orders of magnitude from bohrium (Z = 107) to element 112, for which a cross section of 1 pb was measured. The development of intense beam currents and sensitive detection methods is essential for the production and identification of still heavier elements and new isotopes of already known elements, as well as the measurement of small α-, β-and fission-branching ratios. An equally sensitive set-up is needed for the measurement of excitation functions at low cross sections. Based on our results, it is likely that the production of isotopes of element 114 close to the island of spherical superheavy elements (SHEs) could be achieved by fusion reactions using 208 Pb targets. Systematic studies of the reaction cross sections indicate that the transfer of nucleons is an important process for the initiation of fusion. The data allow for the fixing of a narrow energy window for the production of SHEs using 1n-emission channels. The likelihood of broadening the energy window by investigation of radiative capture reactions, use of neutron deficient projectile isotopes and use of actinide targets is discussed.

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The Prospects of Heavy Element Research

Münzenberg

1994

NATO ASI Series

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Response to the report of the transfermium working group

Cited by 5 publications

References 0 publications

Advances in the Production and Chemistry of the Heaviest Elements

Advances in the Production and Chemistry of the Heaviest Elements

New elements - approaching

The Prospects of Heavy Element Research

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