13 results on '"Krier, Jörg"'
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2. Electron stripping of Bi ions using a modified 1.4 MeV/u gas stripper with pulsed gas injection
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Scharrer, Paul, Jäger, Egon, Barth, Winfried, Bevcic, Mario, Düllmann, Christoph E., Groening, Lars, Horn, Klaus-Peter, Khuyagbaatar, Jadambaa, Krier, Jörg, and Yakushev, Alexander
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- 2015
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3. In situ synthesis of volatile carbonyl complexes with short-lived nuclides
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Even, Julia, Ackermann, Dieter, Asai, Masato, Block, Michael, Brand, Holger, Di Nitto, Antonio, Düllmann, Christoph E., Eichler, Robert, Fan, Fangli, Haba, Hiromitsu, Hartmann, Willi, Hübner, Annett, Heßberger, Fritz P., Huang, Minqhiu, Jäger, Egon, Kaji, Daiya, Kanaya, Jumpei, Kaneya, Yusuke, Khuyagbaatar, Jadambaa, Kindler, Birgit, Kratz, Jens V., Krier, Jörg, Kudou, Yuki, Kurz, Nikolaus, Laatiaoui, Mustapha, Lommel, Bettina, Maurer, Joachim, Miyashita, Sunao, Morimoto, Kouji, Morita, Kosuke, Murakami, Masashi, Nagame, Yuichiro, Nitsche, Heino, Ooe, Kazuhiro, Qin, Zhi, Sato, Tetsuya K., Schädel, Matthias, Steiner, Jutta, Sumita, Takayuki, Takeyama, Mirei, Tanaka, Kengo, Toyoshima, Atsushi, Tsukada, Kazuaki, Türler, Andreas, Usoltsev, Ilya, Wakabayashi, Yasuo, Wang, Yang, Wiehl, Norbert, Yakushev, Alexander, and Yamaki, Sayaka
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- 2015
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4. Application of a novel gas phase synthesis approach to carbonyl complexes of accelerator-produced 5d transition metals
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Götz, Michael, primary, Yakushev, Alexander, additional, Götz, Stefan, additional, Di Nitto, Antonio, additional, Düllmann, Christoph E., additional, Asai, Masato, additional, Kindler, Birgit, additional, Krier, Jörg, additional, Lommel, Bettina, additional, Nagame, Yuichiro, additional, Sato, Tetsuya K., additional, Suzuki, Hayato, additional, Tomitsuka, Tomohiro, additional, Tokoi, Katsuyuki, additional, Toyoshima, Atsushi, additional, and Tsukada, Kazuaki, additional
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- 2021
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5. Application of a novel gas phase synthesis approach to carbonyl complexes of accelerator-produced 5d transition metals.
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Götz, Michael, Yakushev, Alexander, Götz, Stefan, Di Nitto, Antonio, Düllmann, Christoph E., Asai, Masato, Kindler, Birgit, Krier, Jörg, Lommel, Bettina, Nagame, Yuichiro, Sato, Tetsuya K., Suzuki, Hayato, Tomitsuka, Tomohiro, Tokoi, Katsuyuki, Toyoshima, Atsushi, and Tsukada, Kazuaki
- Subjects
SUPERHEAVY elements ,HEAVY elements ,ATOMIC number ,RADIOISOTOPES ,ACCELERATOR mass spectrometry ,TRANSITION metals ,ISOTOPES - Abstract
In 2014 the first synthesis of a transactinide carbonyl complex – seaborgium hexacarbonyl – was reported. This was achieved in gas-phase chemical experiments in a beam-free environment behind the recoil separator GARIS. Extending this work to heavier elements requires more efficient techniques to synthesize carbonyl complexes as production rates of transactinide elements drop with increasing atomic number. A novel approach was thus conceived, which retains the benefit of a beam-free environment but avoids the physical preseparation step. The latter reduces the yields for products of asymmetric reactions such as those used for the synthesis of suitable isotopes of Sg, Bh, Hs and Mt. For this a series of experiments with accelerator-produced radioisotopes of the lighter homologues W, Re and Os was carried out at the tandem accelerator of JAEA Tokai, Japan. A newly developed double-chamber system, which allows for a decoupled recoil ion thermalization and chemical complex formation, was used, which avoids the low-efficiency physical preseparation step. Here, we demonstrate the feasibility of this newly developed method using accelerator-produced short-lived radioisotopes of the 5d homologues of the early transactinides. [ABSTRACT FROM AUTHOR]
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- 2022
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6. Online chemical adsorption studies of Hg, Tl, and Pb on SiO2 and Au surfaces in preparation for chemical investigations on Cn, Nh, and Fl at TASCA
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Lens, Lotte, primary, Yakushev, Alexander, additional, Düllmann, Christoph Emanuel, additional, Asai, Masato, additional, Ballof, Jochen, additional, Block, Michael, additional, David, Helena May, additional, Despotopulos, John, additional, Di Nitto, Antonio, additional, Eberhardt, Klaus, additional, Even, Julia, additional, Götz, Michael, additional, Götz, Stefan, additional, Haba, Hiromitsu, additional, Harkness-Brennan, Laura, additional, Heßberger, Fritz Peter, additional, Herzberg, Rodi D., additional, Hoffmann, Jan, additional, Hübner, Annett, additional, Jäger, Egon, additional, Judson, Daniel, additional, Khuyagbaatar, Jadambaa, additional, Kindler, Birgit, additional, Komori, Yukiko, additional, Konki, Joonas, additional, Kratz, Jens Volker, additional, Krier, Jörg, additional, Kurz, Nikolaus, additional, Laatiaoui, Mustapha, additional, Lahiri, Susanta, additional, Lommel, Bettina, additional, Maiti, Moumita, additional, Mistry, Andrew K., additional, Mokry, Christoph, additional, Moody, Ken, additional, Nagame, Yuichiro, additional, Omtvedt, Jon Petter, additional, Papadakis, Philippos, additional, Pershina, Valeria, additional, Runke, Jörg, additional, Schädel, Matthias, additional, Scharrer, Paul, additional, Sato, Tetsuya, additional, Shaughnessy, Dawn, additional, Schausten, Brigitta, additional, Thörle-Pospiech, Petra, additional, Trautmann, Norbert, additional, Tsukada, Kazuaki, additional, Uusitalo, Juha, additional, Ward, Andrew, additional, Wegrzecki, Maciej, additional, Wiehl, Norbert, additional, and Yakusheva, Vera, additional
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- 2018
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7. In situ synthesis of volatile carbonyl complexes with short-lived nuclides
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Even, Julia, primary, Ackermann, Dieter, additional, Asai, Masato, additional, Block, Michael, additional, Brand, Holger, additional, Di Nitto, Antonio, additional, Düllmann, Christoph E., additional, Eichler, Robert, additional, Fan, Fangli, additional, Haba, Hiromitsu, additional, Hartmann, Willi, additional, Hübner, Annett, additional, Heßberger, Fritz P., additional, Huang, Minqhiu, additional, Jäger, Egon, additional, Kaji, Daiya, additional, Kanaya, Jumpei, additional, Kaneya, Yusuke, additional, Khuyagbaatar, Jadambaa, additional, Kindler, Birgit, additional, Kratz, Jens V., additional, Krier, Jörg, additional, Kudou, Yuki, additional, Kurz, Nikolaus, additional, Laatiaoui, Mustapha, additional, Lommel, Bettina, additional, Maurer, Joachim, additional, Miyashita, Sunao, additional, Morimoto, Kouji, additional, Morita, Kosuke, additional, Murakami, Masashi, additional, Nagame, Yuichiro, additional, Nitsche, Heino, additional, Ooe, Kazuhiro, additional, Qin, Zhi, additional, Sato, Tetsuya K., additional, Schädel, Matthias, additional, Steiner, Jutta, additional, Sumita, Takayuki, additional, Takeyama, Mirei, additional, Tanaka, Kengo, additional, Toyoshima, Atsushi, additional, Tsukada, Kazuaki, additional, Türler, Andreas, additional, Usoltsev, Ilya, additional, Wakabayashi, Yasuo, additional, Wang, Yang, additional, Wiehl, Norbert, additional, Yakushev, Alexander, additional, and Yamaki, Sayaka, additional
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- 2014
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8. In-situ formation, thermal decomposition, and adsorption studies of transition metal carbonyl complexes with short-lived radioisotopes
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Even, Julia, primary, Yakushev, Alexander, additional, Düllmann, Christoph Emanuel, additional, Dvorak, Jan, additional, Eichler, Robert, additional, Gothe, Oliver, additional, Hartmann, Willy, additional, Hild, Daniel, additional, Jäger, Egon, additional, Khuyagbaatar, Jadambaa, additional, Kindler, Birgit, additional, Kratz, Jens Volker, additional, Krier, Jörg, additional, Lommel, Bettina, additional, Niewisch, Lorenz, additional, Nitsche, Heino, additional, Pysmenetska, Inna, additional, Schädel, Matthias, additional, Schausten, Brigitta, additional, Türler, Andreas, additional, Wiehl, Norbert, additional, and Wittwer, David, additional
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- 2014
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9. Online chemical adsorption studies of Hg, Tl, and Pb on SiO2and Au surfaces in preparation for chemical investigations on Cn, Nh, and Fl at TASCA
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Lens, Lotte, Yakushev, Alexander, Düllmann, Christoph Emanuel, Asai, Masato, Ballof, Jochen, Block, Michael, David, Helena May, Despotopulos, John, Di Nitto, Antonio, Eberhardt, Klaus, Even, Julia, Götz, Michael, Götz, Stefan, Haba, Hiromitsu, Harkness-Brennan, Laura, Heßberger, Fritz Peter, Herzberg, Rodi D., Hoffmann, Jan, Hübner, Annett, Jäger, Egon, Judson, Daniel, Khuyagbaatar, Jadambaa, Kindler, Birgit, Komori, Yukiko, Konki, Joonas, Kratz, Jens Volker, Krier, Jörg, Kurz, Nikolaus, Laatiaoui, Mustapha, Lahiri, Susanta, Lommel, Bettina, Maiti, Moumita, Mistry, Andrew K., Mokry, Christoph, Moody, Ken, Nagame, Yuichiro, Omtvedt, Jon Petter, Papadakis, Philippos, Pershina, Valeria, Runke, Jörg, Schädel, Matthias, Scharrer, Paul, Sato, Tetsuya, Shaughnessy, Dawn, Schausten, Brigitta, Thörle-Pospiech, Petra, Trautmann, Norbert, Tsukada, Kazuaki, Uusitalo, Juha, Ward, Andrew, Wegrzecki, Maciej, Wiehl, Norbert, and Yakusheva, Vera
- Abstract
Online gas-solid adsorption studies with single-atom quantities of Hg, Tl, and Pb, the lighter homologs of the superheavy elements (SHE) copernicium (Cn, Z=112), nihonium (Nh, Z=113), and flerovium (Fl, Z=114), were carried out using short-lived radioisotopes. The interaction with Au and SiO2surfaces was studied and the overall chemical yield was determined. Suitable radioisotopes were produced in fusion-evaporation reactions, isolated in the gas-filled recoil separator TASCA, and flushed rapidly to an adjacent setup of two gas chromatography detector arrays covered with SiO2(first array) and Au (second array). While Tl and Pb adsorbed on the SiO2surface, Hg interacts only weakly and reached the Au-covered array. Our results contribute to elucidating the influence of relativistic effects on chemical properties of the heaviest elements by providing experimental data on these lighter homologs.
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- 2018
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10. Superheavy Element Flerovium (Element 114) Is a Volatile Metal
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Yakushev, Alexander, primary, Gates, Jacklyn M., additional, Türler, Andreas, additional, Schädel, Matthias, additional, Düllmann, Christoph E., additional, Ackermann, Dieter, additional, Andersson, Lise-Lotte, additional, Block, Michael, additional, Brüchle, Willy, additional, Dvorak, Jan, additional, Eberhardt, Klaus, additional, Essel, Hans G., additional, Even, Julia, additional, Forsberg, Ulrika, additional, Gorshkov, Alexander, additional, Graeger, Reimar, additional, Gregorich, Kenneth E., additional, Hartmann, Willi, additional, Herzberg, Rolf-Dietmar, additional, Heßberger, Fritz P., additional, Hild, Daniel, additional, Hübner, Annett, additional, Jäger, Egon, additional, Khuyagbaatar, Jadambaa, additional, Kindler, Birgit, additional, Kratz, Jens V., additional, Krier, Jörg, additional, Kurz, Nikolaus, additional, Lommel, Bettina, additional, Niewisch, Lorenz J., additional, Nitsche, Heino, additional, Omtvedt, Jon Petter, additional, Parr, Edward, additional, Qin, Zhi, additional, Rudolph, Dirk, additional, Runke, Jörg, additional, Schausten, Brigitta, additional, Schimpf, Erwin, additional, Semchenkov, Andrey, additional, Steiner, Jutta, additional, Thörle-Pospiech, Petra, additional, Uusitalo, Juha, additional, Wegrzecki, Maciej, additional, and Wiehl, Norbert, additional
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- 2014
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11. Rapid Synthesis of Radioactive Transition-Metal Carbonyl Complexes at Ambient Conditions
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Even, Julia, primary, Yakushev, Alexander, additional, Düllmann, Christoph E., additional, Dvorak, Jan, additional, Eichler, Robert, additional, Gothe, Oliver, additional, Hild, Daniel, additional, Jäger, Egon, additional, Khuyagbaatar, Jadambaa, additional, Kratz, Jens V., additional, Krier, Jörg, additional, Niewisch, Lorenz, additional, Nitsche, Heino, additional, Pysmenetska, Inna, additional, Schädel, Matthias, additional, Schausten, Brigitta, additional, Türler, Andreas, additional, Wiehl, Norbert, additional, and Wittwer, David, additional
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- 2012
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12. In-situformation, thermal decomposition, and adsorption studies of transition metal carbonyl complexes with short-lived radioisotopes
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Even, Julia, Yakushev, Alexander, Düllmann, Christoph Emanuel, Dvorak, Jan, Eichler, Robert, Gothe, Oliver, Hartmann, Willy, Hild, Daniel, Jäger, Egon, Khuyagbaatar, Jadambaa, Kindler, Birgit, Kratz, Jens Volker, Krier, Jörg, Lommel, Bettina, Niewisch, Lorenz, Nitsche, Heino, Pysmenetska, Inna, Schädel, Matthias, Schausten, Brigitta, Türler, Andreas, Wiehl, Norbert, and Wittwer, David
- Abstract
AbstractWe report on the in-situsynthesis of metal carbonyl complexes with short-lived isotopes of transition metals. Complexes of molybdenum, technetium, ruthenium and rhodium were synthesized by thermalisation of products of neutron-induced fission of 249Cf in a carbon monoxide-nitrogen mixture. Complexes of tungsten, rhenium, osmium, and iridium were synthesized by thermalizing short-lived isotopes produced in 24Mg-induced fusion evaporation reactions in a carbon monoxide containing atmosphere. The chemical reactions took place at ambient temperature and pressure conditions. The complexes were rapidly transported in a gas stream to collection setups or gas phase chromatography devices. The physisorption of the complexes on Au and SiO2surfaces was studied. We also studied the stability of some of the complexes, showing that these start to decompose at temperatures above 300 ℃ in contact with a quartz surface. Our studies lay a basis for the investigation of such complexes with transactinides.
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- 2014
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13. TASCAを用いたCn, Nh, Fl化学実験のためのHg, Tl, PbのSiO2及びAu表面に対するオンライン化学吸着研究
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Lotte Lens, Alexander Yakushev, Christoph Emanuel Düllmann, Masato Asai, Jochen Ballof, Michael Block, Helena May David, John Despotopulos, Antonio Di Nitto, Klaus Eberhardt, Julia Even, Michael Götz, Stefan Götz, Hiromitsu Haba, Laura Harkness-Brennan, Fritz Peter Heßberger, Rodi D. Herzberg, Jan Hoffmann, Annett Hübner, Egon Jäger, Daniel Judson, Jadambaa Khuyagbaatar, Birgit Kindler, Yukiko Komori, Joonas Konki, Jens Volker Kratz, Jörg Krier, Nikolaus Kurz, Mustapha Laatiaoui, Susanta Lahiri, Bettina Lommel, Moumita Maiti, Andrew K. Mistry, Christoph Mokry, Ken Moody, Yuichiro Nagame, Jon Petter Omtvedt, Philippos Papadakis, Valeria Pershina, Jörg Runke, Matthias Schädel, Paul Scharrer, Tetsuya Sato, Dawn Shaughnessy, Brigitta Schausten, Petra Thörle-Pospiech, Norbert Trautmann, Kazuaki Tsukada, Juha Uusitalo, Andrew Ward, Maciej Wegrzecki, Norbert Wiehl, Vera Yakusheva, Research unit Nuclear & Hadron Physics, Lens, Lotte, Yakushev, Alexander, Düllmann, Christoph Emanuel, Asai, Masato, Ballof, Jochen, Block, Michael, David, Helena May, Despotopulos, John, Di Nitto, Antonio, Eberhardt, Klau, Even, Julia, Götz, Michael, Götz, Stefan, Haba, Hiromitsu, Harkness-Brennan, Laura, Heßberger, Fritz Peter, Herzberg, Rodi D., Hoffmann, Jan, Hübner, Annett, Jäger, Egon, Judson, Daniel, Khuyagbaatar, Jadambaa, Kindler, Birgit, Komori, Yukiko, Konki, Joona, Kratz, Jens Volker, Krier, Jörg, Kurz, Nikolau, Laatiaoui, Mustapha, Lahiri, Susanta, Lommel, Bettina, Maiti, Moumita, Mistry, Andrew K., Mokry, Christoph, Moody, Ken, Nagame, Yuichiro, Omtvedt, Jon Petter, Papadakis, Philippo, Pershina, Valeria, Runke, Jörg, Schädel, Matthia, Scharrer, Paul, Sato, Tetsuya, Shaughnessy, Dawn, Schausten, Brigitta, Thörle-Pospiech, Petra, Trautmann, Norbert, Tsukada, Kazuaki, Uusitalo, Juha, Ward, Andrew, Wegrzecki, Maciej, Wiehl, Norbert, and Yakusheva, Vera
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Analytical chemistry ,chemistry.chemical_element ,Electronic structure ,010402 general chemistry ,01 natural sciences ,adsorption studie ,thermochromatography ,Homologs of superheavy element ,RELATIVISTIC PERIODIC DFT ,Metal ,GSI ,Adsorption ,CHEMISTRY ,0103 physical sciences ,isothermal chromatography ,Physical and Theoretical Chemistry ,SUPERHEAVY ELEMENTS ,010306 general physics ,Copernicium ,Chemistry ,QUARTZ SURFACE ,0104 chemical sciences ,gas phase chromatography of single atom ,HEAVIEST ELEMENTS ,Flerovium ,ELECTRONIC-STRUCTURE ,visual_art ,Yield (chemistry) ,METAL ,visual_art.visual_art_medium ,Gas chromatography ,Relativistic quantum chemistry ,physical preseparation ,SYSTEM - Abstract
Online gas-solid adsorption studies with single atom quantities of Hg, Tl, and Pb on SiO$_{2}$ and Au surfaces were carried out using short-lived radioisotopes with half-lives in the range of 4-49 s. This is a model study to measure adsorption enthalpies of superheavy elements Cn, Nh, and Fl. The short-lived isotopes were produced and separated by the gas-filled recoil separator TASCA at GSI. The products were stopped in He gas, and flushed into gas chromatography columns made of Si detectors whose surfaces were covered by SiO$_{2}$ or Au. The short-lived Tl and Pb were successfully measured by the Si detectors with the SiO$_{2}$ surface at room temperature. On the other hand, the Hg did not adsorb on the SiO$_{2}$ surface, but adsorbed on the Au surface. The results demonstrated that the adsorption properties of short-lived Hg, Tl, and Pb could be studied with this setup, and that this method is applicable to the experiment for Cn, Nh, and Fl., 半減期4$\sim$49秒の短寿命同位体を用いて、水銀(Hg), タリウム(Tl), 鉛(Pb)の単一原子レベルでのSiO$_{2}$及びAu表面への固体吸着挙動をオンライン気相実験により調べた。超重元素Cn, Nh, Flの吸着エンタルピー測定のためのモデル実験として実施した。短寿命同位体はドイツ重イオン研究所の反跳核分離装置TASCAを用いて生成・分離した。生成核はヘリウムガス中に捕集された後、SiO$_{2}$あるいはAuで表面を覆われたSi検出器で作製されたガスクロマトグラフィーカラムへと導入した。短寿命Tl及びPb同位体は室温においてSiO$_{2}$表面に吸着し、Si検出器で測定することに成功した。一方、HgはSiO$_{2}$表面には吸着せず、Au表面に吸着した。この結果より、本実験のセットアップを用いることで短寿命Hg, Tl, Pb同位体の吸着特性を調べることができると証明され、この手法がCn, Nh, Flの実験にも適用できることが確認された。
- Published
- 2018
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