M. Schädel

GSI Helmholtz Centre for Heavy Ion Research

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

W. Brüchle

GSI Helmholtz Centre for Heavy Ion Research

Jens Volker Kratz

Johannes Gutenberg University Mainz

ΑT

Α. Türler

University of Bern

Ch. E. Düllmann

Johannes Gutenberg University Mainz

ΒS

Β. Schausten

GSI Helmholtz Centre for Heavy Ion Research

A. Yakushev

GSI Helmholtz Centre for Heavy Ion Research

E. Jäger

GSI Helmholtz Centre for Heavy Ion Research

ΝT

Ν. Trautmann

Johannes Gutenberg University Mainz

ΚΕ

Κ. Ε. Gregorich

Lawrence Livermore National Laboratory

H. W. Gäggeler

University of Bern

Cooperative Institutions

GSI Helmholtz Centre for Heavy Ion Research

187

Johannes Gutenberg University Mainz

169

Lawrence Berkeley National Laboratory

106

Research Association for Combustion Engines

Japan Atomic Energy Agency

Centre National de la Recherche Scientifique

Advanced Science Research Center

University of California, Berkeley

Joint Institute for Nuclear Research

Institut National de Physique Nucléaire et de Physique des Particules

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Erste experimentelle Bestimmung einer thermochemischen Größe einer Seaborgiumverbindung

Angewandte Chemie (1999)

Α. Türler W. Brüchle R. Dressler Β. Eichler R. Eichler

Nur wenige Atome von Seaborgium (Sg, Element 106), die zu flüchtigem SgO2Cl2 umgesetzt wurden, reichten aus, um die Sublimationsenthalpie dieser Verbindung gaschromatographisch zu bestimmen. Darüber hinaus wurde gezeigt, daß Sg in der Gruppe 6 eher mit W verwandt ist als mit Mo.

10.1002/(sici)1521-3757(19990802)111:15<2349::aid-ange2349>3.0.co;2-6

Cite

Citations (9)

Search for Superheavy Elements in the ^{238}U + ^{238}U Reaction

Physical Review Letters (1980)

H. W. Gäggeler Ν. Trautmann W. Brüchle G. Herrmann Jens Volker Kratz

A search was made for spontaneously fissioning superheavy elements in damped collisions of two uranium nuclei. Different techniques were applied covering the elements 108 to 118 and \ensuremath{\simeq} 126, and a half-life range from 1 ms to more than 1 yr. No evidence for superheavy elements was found at upper cross-section limits of ${10}^{\ensuremath{-}32}$, ${10}^{\ensuremath{-}33}$, and ${10}^{\ensuremath{-}35}$ ${\mathrm{cm}}^{2}$ for half-lives from 1 to 100 ms, 100 ms to 1 d, and 1 d to 1 yr, respectively.

Superheavy Elements

10.1103/physrevlett.45.1824.2

Cite

Citations (7)

On the way to the synthesis of the first transactinide carbonyl complex

J. Even A. Yakusehv D. Wittwer Ch. E. Düllmann Jiří Dvořák

Source

Cite

Citations (0)

Aqueous chemistry of transactinides

Radiochimica Acta (2001)

M. Schädel

The aqueous chemistry of the first three transactinide elements is briefly reviewed with special emphasis given to recent experimental results. Short introductory remarks are discussing the atom-at-a-time situation of transactinide chemistry as a result of low production cross-sections and short half-lives. In general, on-line experimental techniques and, more specifically, the Automated Rapid Chemistry Apparatus, ARCA, are presented. Present and future developments of experimental techniques and resulting perspectives are outlined at the end. The central part is mainly focussing on hydrolysis and complex formation aspects of the superheavy group 4, 5, and 6 transition metals with F - and Cl - anions. Experimental results are compared with the behaviour of lighter homologuous elements and with relativistic calculations. It will be shown that the chemical behaviour of the first superheavy elements is already strongly influenced by relativistic effects. While it is justified to place rutherfordium, dubnium and seaborgium in the Periodic Table of the Elements into group 4, 5 and 6, respectively, it is no more possible to deduce from this position in detail the chemical properties of these transactinide or superheavy elements.

Superheavy Elements

Relativistic quantum chemistry

10.1524/ract.2001.89.11-12.721

Cite

Citations (20)

Fusion reaction Ca48+Bk249 leading to formation of the element Ts ( Z=117

Physical review. C (2019)

J. Khuyagbaatar A. Yakushev Ch. E. Düllmann D. Ackermann L.-L. Andersson

The heaviest currently known nuclei, which have up to 118 protons, have been produced in $^{48}\mathrm{Ca}$ induced reactions with actinide targets. Among them, the element tennessine (Ts), which has 117 protons, has been synthesized by fusing $^{48}\mathrm{Ca}$ with the radioactive target $^{249}\mathrm{Bk}$, which has a half-life of 327 d. The experiment was performed at the gas-filled recoil separator TASCA. Two long and two short $\ensuremath{\alpha}$ decay chains were observed. The long chains were attributed to the decay of $^{294}\mathrm{Ts}$. The possible origin of the short-decay chains is discussed in comparison with the known experimental data. They are found to fit with the decay chain patterns attributed to $^{293}\mathrm{Ts}$. The present experimental results confirm the previous findings at the Dubna Gas-Filled Recoil Separator on the decay chains originating from the nuclei assigned to Ts.

Decay chain

Recoil

Alpha decay

10.1103/physrevc.99.054306

Cite

Citations (34)

Sulfate complexation of element 104, Rf, in H₂SO₄/HNO₃mixed solution

Radiochimica Acta (2011)

Z. J. Li Atsushi Toyoshima M. Asai K. Tsukada Tetsuya K. Sato

Abstract The cation-exchange behavior of 261 Rf ( T 1/2 = 78 s) produced in the 248 Cm( 18 O, 5 n ) reaction was studied on a “one-atom-at-a-time” scale in 0.15–0.69 M H 2 SO 4 /HNO 3 mixed solutions ([H + ]=1.0 M) using an automated ion-exchange separation apparatus coupled with the detection system for alpha-spectroscopy (AIDA). It was found that adsorption probabilities ( decrease with an increase of [HSO 4 − ], showing a successive formation of Rf sulfate complexes. Rf exhibits a weaker complex formation tendency compared to the lighter homologues Zr and Hf. This is in good agreement with theoretical predictions including relativistic effects.

10.1524/ract.2012.1898

Cite

Citations (17)

Transuranium elements

Access Science (2015)

M. Schädel P. Armbruster Glenn T. Seaborg

AccessScience is an authoritative and dynamic online resource that contains incisively written, high-quality educational material covering all major scientific disciplines. An acclaimed gateway to scientific knowledge, AccessScience is continually expanding the ways it can demonstrate and explain core, trustworthy scientific information that inspires and guides users to deeper knowledge.

Trustworthiness

Transuranium element

Gateway (web page)

10.1036/1097-8542.706800

Cite

Citations (1)

Fluorido Complex Formation of Element 104, Rutherfordium (Rf)

Bulletin of the Chemical Society of Japan (2011)

Yasuo Ishíi Atsushi Toyoshima Kazuaki Tsukada Masato Asai Zijie Li

Abstract We have investigated the cation-exchange behavior of element 104, rutherfordium (Rf), together with its lighter group-4 homologs Zr and Hf, and the tetravalent pseudo-homolog Th in HF/HNO3 mixed solution. The results, obtained on a one-atom-at-a-time scale, demonstrate that distribution coefficients (Kd) of Rf in HF/0.10 M HNO3 decrease with increasing concentration of the fluoride ion [F−]. This resembles the behavior of the homologs, indicating the consecutive formation of fluorido complexes of Rf. We also measured the Kd values of Rf and the homologs as a function of the hydrogen ion concentration [H+] in the range of [F−] = 5.29 × 10−7–3.17 × 10−6 M. The log Kd values decrease linearly with an increase of log[H+] with slopes between −2.1 and −2.5. This indicates that these elements are likely to form the same chemical compounds: mixture of [MF]3+ and [MF2]2+ (M = Rf, Zr, Hf, and Th) in the studied solution. It is also ascertained that the fluorido complex formation of Rf is significantly weaker than that of Zr and Hf, but it is stronger than that of Th.

10.1246/bcsj.20110126

Cite

Citations (20)

Beta decay of 103Sn

The European Physical Journal A (2005)

O. Kavatsyuk M. Kavatsyuk L. Batist A. Banu F. Becker

Beta decay

Branching fraction

10.1140/epja/i2005-10108-1

Cite

Citations (21)

Cold fusion reactions with 48Ca

Nuclear Physics A (1989)

H. W. Gäggeler D.T. Jost Α. Türler P. Armbruster W. Brüchle

10.1016/0375-9474(89)90689-1

Cite

Citations (88)