Die schwersten chemischen Elemente

Herrmann, G.; Seyb, Karl‐Erich

doi:10.1007/bf01185734

Cited by 12 publications

(3 citation statements)

References 67 publications

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“…The cross section for EVR formation at the kinetic energy E in the c.m.s. system can be formulated by using the quantities peE , 1) and weE + Q, 1):…”

Section: The Entrance Channel Limitationsmentioning

confidence: 99%

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On the Production of Heavy Elements by Cold Fusion: The Elements 106 to 109

Armbruster¹

1985

Annu. Rev. Nucl. Part. Sci.

189

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“…The cross section for EVR formation at the kinetic energy E in the c.m.s. system can be formulated by using the quantities peE , 1) and weE + Q, 1):…”

Section: The Entrance Channel Limitationsmentioning

confidence: 99%

“…Most of the data now accepted were obtained at Berkeley and Dubna during this time. The reactions investigated before 1969 are compiled in Reference (1). The more recent results are reviewed in References (2,3).…”

mentioning

confidence: 99%

On the Production of Heavy Elements by Cold Fusion: The Elements 106 to 109

Armbruster¹

1985

Annu. Rev. Nucl. Part. Sci.

189

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“…12 and by Herrmann and Seyb, 16 and Flerov, Druin, and PI eve. 17 Superheavy elements have, however, been discussed as the explanation for some as yet unexplained evidence for either existing or extinct natural radioactivities.…”

Section: Search For Superheavy Elements In Terrestrial Mattermentioning

confidence: 94%

Search for Superheavy Elements in Terrestrial Matter

1971

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and 8.007 MeV. A more detailed account of the energy levels in 25X Fm populated by the a-particle decay of 255 No is the subject of a future publication. 9 Based on our experience with the identification of nobelium, we feel that a conclusive atomicnumber identification can be obtained with the observation of far fewer coincident events than were recorded in this experiment. We are currently applying this technique to the identification and study of a -active isotopes of transnobelium elements.We wish to express our thanks to Dr. M. L. Mallory and E. D. Hudson for pioneering ion source and cyclotron development, to A. W. Riikola and the operating crew of the Oak Ridge isochronous cyclotron for providing copious quantities of 12 C +4 ions for this experiment, and to Dr. R. D. Baybarz for preparing the 249 Cf target. * Research sponsored by the U. S. Atomic Energy Commission under contract with the Union Carbide Corporation.Extensive discussions on the physical 1 and chemical properties 2 of superheavy elements began after Myers and Swiatecki 3 pointed out that shell effects may lead to an island of relative stability beyond the present periodic table and after Meldner and Roper calculated that the next shell closure after 82 should probably occur at proton number 114. Detailed lifetime calculations were carried out for superheavy nuclei with even proton numbers by Nilsson 5i6 and Greiner 7 and their collaborators, and it was emphasized that additional stability is expected for odd-Z and/or odd-i\T nuclei. 7 * 8 These studies indicate for certain superheavy nuclei half-lives sufficiently long 5 for survival throughout geologic time, i.e., T x / 2 g 10 8 yr, and for occurrence in the cosmic radiation, T 1/2^1 0 5 yr, provided that such nuclei are produced in nucleosynthesis.

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Der lose Zusammenhang zwischen Elektronenkonfiguration und chemischem Verhalten der schweren Elemente (Transurane)

Jøgensen

Jorgensenn

1973

Angewandte Chemie

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Einen geradlinigen Zusammenhang zwischen der Elektronen‐Grundkonfiguration des neutralen Atoms eines betrachteten Elements und seiner Chemie gibt es nicht. vor allem hängt die Wahl des Oxidationszustandes von der Bilanz aus den nacheinander am freien Ion aufzuwendenden Ionisierungsarbeiten und der jeweiligen Hydratations‐oder Madelung‐Energie ab, durch die bevorzugt höhere Oxidationsstufen stabilisiert werden. Besondere Liganden wie das Oxid‐Ion vermögen unerwartet hohe Oxidationsstufen auszubilden. Am spezifischen Beispiel der Elemente Vanadium unt Thorium werden die Schwerpunktslagen von Elektronenkonfigurationen diskutiert. Eine Betrachtung der Chemie der Elemente mit der Ordnungszahl Z=101, 102, 103, 104, 105 und 112 (von denen man bisher nur einige tausend Atome erhalten hat) und der (noch unbekannten) Element mit Z=108, 109, 114, 126, 164 und 184 schließt sich an.

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Die schwersten chemischen Elemente

Cited by 12 publications

References 67 publications

On the Production of Heavy Elements by Cold Fusion: The Elements 106 to 109

On the Production of Heavy Elements by Cold Fusion: The Elements 106 to 109

Search for Superheavy Elements in Terrestrial Matter

Der lose Zusammenhang zwischen Elektronenkonfiguration und chemischem Verhalten der schweren Elemente (Transurane)

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