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209 results on '"Ooe K"'

1. Complex chemistry with complex compounds

Author

Eichler Robert, Asai M., Brand H., Chiera N.M., Di Nitto A., Dressler R., Düllmann Ch.E., Even J., Fangli F., Goetz M., Haba H., Hartmann W., Jäger E., Kaji D., Kanaya J., Kaneya Y., Khuyagbaatar J., Kindler B., Komori Y., Kraus B., Kratz J.V., Krier J., Kudou Y., Kurz N., Miyashita S., Morimoto K., Morita K., Murakami M., Nagame Y., Ooe K., Piguet D., Sato N., Sato T.K., Steiner J., Steinegger P., Sumita T., Takeyama M., Tanaka K., Tomitsuka T., Toyoshima A., Tsukada K., Türler A., Usoltsev I., Wakabayashi Y., Wang Y., Wiehl N., Wittwer Y., Yakushev A., Yamaki S., Yano S., and Qin Z.

Subjects
Physics, QC1-999
Abstract

In recent years gas-phase chemical studies assisted by physical pre-separation allowed for the investigation of fragile single molecular species by gas-phase chromatography. The latest success with the heaviest group 6 transactinide seaborgium is highlighted. The formation of a very volatile hexacarbonyl compound Sg(CO)6 was observed similarly to its lighter homologues molybdenum and tungsten. The interactions of these gaseous carbonyl complex compounds with quartz surfaces were investigated by thermochromatography. Second-generation experiments are under way to investigate the intramolecular bond between the central metal atom of the complexes and the ligands addressing the influence of relativistic effects in the heaviest compounds. Our contribution comprises some aspects of the ongoing challenging experiments as well as an outlook towards other interesting compounds related to volatile complex compounds in the gas phase.

Published
2016
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3. Decay Properties of $^{266}$Bh and $^{262}$Db Produced in the $^{248}$Cm + $^{23}$Na Reaction

Author

Morita, K., Morimoto, K., Kaji, D., Haba, H., Ozeki, K., Kudou, Y., Sato, N., Sumita, T., Yoneda, A., Ichikawa, T., Fujimori, Y., Goto, S., Ideguchi, E., Kasamatsu, Y., Katori, K., Komori, Y., Koura, H., Kudo, H., Ooe, K., Ozawa, A., Tokanai, F., Tsukada, K., Yamaguchi, T., and Yoshida, A.

Subjects
Nuclear Experiment
Abstract

Decay properties of an isotope $^{266}$Bh and its daughter nucleus $^{262}$Db produced by the $^{248}$Cm($^{23}$Na, 5\textit{n}) reaction were studied by using a gas-filled recoil separator coupled with a position-sensitive semiconductor detector. $^{266}$Bh was clearly identified from the correlation of the known nuclide, $^{262}$Db. The obtained decay properties of $^{266}$Bh and $^{262}$Db are consistent with those observed in the $^{278}$113 chain, which provided further confirmation of the discovery of $^{278}$113., Comment: Accepted for publication in J. Phys. Soc. JPN., to be published in Vol.78 No. 6

Published
2009
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4. Synthesis and detection of a seaborgium carbonyl complex

Author

Even, J., Yakushev, A., Düllmann, Ch. E., Haba, H., Asai, M., Sato, T. K., Brand, H., Di Nitto, A., Eichler, R., Fan, F. L., Hartmann, W., Huang, M., Jäger, E., Kaji, D., Kanaya, J., Kaneya, Y., Khuyagbaatar, J., Kindler, B., Kratz, J. V., Krier, J., Kudou, Y., Kurz, N., Lommel, B., Miyashita, S., Morimoto, K., Morita, K., Murakami, M., Nagame, Y., Nitsche, H., Ooe, K., Qin, Z., Schädel, M., Steiner, J., Sumita, T., Takeyama, M., Tanaka, K., Toyoshima, A., Tsukada, K., Türler, A., Usoltsev, I., Wakabayashi, Y., Wang, Y., Wiehl, N., and Yamaki, S.

Published
2014

5. Measurement of the first ionization potential of lawrencium, element 103

Author

Sato, T.K., Asai, M., Borschevsky, A., Stora, T., Sato, N., Kaneya, Y., Tsukada, K., Dullmann, Ch. E., Eberhardt, K., Eliav, E., Ichikawa, S., Kaldor, U., Kratz, J.V., Miyashita, S., Nagame, Y., Ooe, K., Osa, A., Renisch, D., Runke, J., Schadel, M., Thorle-Pospiech, P., Toyoshima, A., and Trautmann, N.

Subjects
Ionization -- Chemical properties -- Measurement, Lawrencium -- Chemical properties, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

The chemical properties of an element are primarily governed by the configuration of electrons in the valence shell. Relativistic effects influence the electronic structure of heavy elements in the sixth row of the periodic table, and these effects increase dramatically in the seventh row--including the actinides--even affecting ground-state configurations (1,2). Atomic s and [p.sub.1/2] orbitals are stabilized by relativistic effects, whereas [p.sub.3/2], d and f orbitals are destabilized, so that ground-state configurations of heavy elements may differ from those of lighter elements in the same group. The first ionization potential ([IP.sub.1]) is a measure of the energy required to remove one valence electron from a neutral atom, and is an atomic property that reflects the outermost electronic configuration. Precise and accurate experimental determination of IP1 gives information on the binding energy of valence electrons, and also, therefore, on the degree of relativistic stabilization. However, such measurements are hampered by the difficulty in obtaining the heaviest elements on scales of more than one atom at a time (3-5). Here we report that the experimentally obtained IP1 of the heaviest actinide, lawrencium (Lr, atomic number 103), is [4.96.sup.+0.08.sub.-0.07] electronvolts. The IP1 of Lr was measured with [sup.256]Lr (half-life 27 seconds) using an efficient surface ion-source and a radioisotope detection system coupled to a mass separator. The measured [IP.sub.1] is in excellent agreement with the value of 4.963(15) electronvolts predicted here by state-of-the-art relativistic calculations. The present work provides a reliable benchmark for theoretical calculations and also opens the way for [IP.sub.1] measurements of superheavy elements (that is, transactinides) on an atom-at-a-time scale., The chemical characterization of heavy elements at the end of the actinides and of all transactinides, performed to probe their positions in the periodic table (4-10), has been, so far, [...]

Published
2015

6. Chemical studies of Mo and W in preparation of a seaborgium (Sg) reduction experiment using MDG, FEC, and SISAK

Author

Toyoshima, A., Ooe, K., Miyashita, S., Asai, M., Attallah, M. F., Goto, N., Gupta, N. S., Haba, H., Huang, M., Kanaya, J., Kaneya, Y., Kasamatsu, Y., Kitatsuji, Y., Kitayama, Y., Koga, K., Komori, Y., Koyama, T., Kratz, J. V., Lerum, H. V., Oshimi, Y., Pershina, V., Sato, D., Sato, T. K., Shigekawa, Y., Shinohara, A., Tanaka, A., Tsukada, K., Tsuto, S., Yokokita, T., Yokoyama, A., Omtvedt, J. P., Nagame, Y., and Schädel, M.

Published
2015
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7. Development of a new continuous dissolution apparatus with a hydrophobic membrane for superheavy element chemistry

Author

Ooe, K., Attallah, M. F., Asai, M., Goto, N., Gupta, N. S., Haba, H., Huang, M., Kanaya, J., Kaneya, Y., Kasamatsu, Y., Kitatsuji, Y., Kitayama, Y., Koga, K., Komori, Y., Koyama, T., Kratz, J. V., Lerum, H. V., Miyashita, S., Oshimi, Y., Pershina, V., Sato, D., Sato, T. K., Shigekawa, Y., Shinohara, A., Tanaka, A., Toyoshima, A., Tsukada, K., Tsuto, S., Yokokita, T., Yokoyama, A., Omtvedt, J. P., Nagame, Y., and Schädel, M.

Published
2015
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11. NUCLEAR CHEMISTRY: Synthesis and detection of a seaborgium carbonyl complex

Author

Even, J., Yakushev, A., Düllmann, Ch. E., Haba, H., Asai, M., Sato, T. K., Brand, H., Di Nitto, A., Eichler, R., Fan, F. L., Hartmann, W., Huang, M., Jäger, E., Kaji, D., Kanaya, J., Kaneya, Y., Khuyagbaatar, J., Kindler, B., Kratz, J. V., Krier, J., Kudou, Y., Kurz, N., Lommel, B., Miyashita, S., Morimoto, K., Morita, K., Murakami, M., Nagame, Y., Nitsche, H., Ooe, K., Qjn, Z., Schädel, M., Steiner, J., Sumita, T., Takeyama, M., Tanaka, K., Toyoshima, A., Tsukada, K., Tiirler, A., Usoltsev, I., Wakabayashi, Y., Wang, Y., Wiehl, N., and Yamaki, S.

Published
2014
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14. Production of Bh 266 in the Cm 248 (Na 23,5n) Bh 266 reaction and its decay properties

Author

Haba, H., Fan, F., Kaji, D., Kasamatsu, Y., Kikunaga, H., Komori, Yukiko, Kondo, N., Kudo, H., Morimoto, K., Morita, K., Murakami, M., Nishio, K., Omtvedt, Jon Petter, Ooe, K., Qin, Zhi, Sato, D., Sato, N., Sato, T.K., Shigekawa, Y., Shinohara, A., Takeyama, M., Tanaka, T., Toyoshima, A., Tsukada, Kazuaki, Wakabayashi, Y., Wang, Y., Wulff, Solveig Birgitte Aker, Yamaki, S., Yano, S., Yasuda, Y., and Yokokita, T.

Abstract

The nuclide 266Bh was produced in the 248Cm(23Na,5n)266Bh reaction at beam energies of 125.9, 130.6, and 135.3 MeV. Decay properties of 266Bh were investigated with a rotating wheel apparatus for α and spontaneous fission (SF) spectrometry under low background conditions attained by a gas-jet transport system coupled to the RIKEN gas-filled recoil ion separator. Based on genetically correlated α−α and α-SF decay chains, a total of 23 chains were assigned to 266Bh and its daughter nuclide 262Db and granddaughter 258Lr. The half-life of 266Bh was measured to be T1/2=10.0+2.6−1.7s which is an order of magnitude longer than the literature data. The α-particle energies of 266Bh disperse widely in the range of Eα=8.62–9.40MeV. The maximum production cross section for the 248Cm(23Na,5n)266Bh reaction was determined to be σ=57±14 pb at 130.6 MeV, whereas the upper limit for the 248Cm(23Na,4n)267Bh reaction was σ≤14 pb at 121.2 MeV. These cross sections are discussed by comparing with the literature data as well as the theoretical calculations.

Published
2020

16. Production of Bh266 in the Cm248(Na23,5n)Bh266 reaction and its decay properties

Author

Haba, H., primary, Fan, F., additional, Kaji, D., additional, Kasamatsu, Y., additional, Kikunaga, H., additional, Komori, Y., additional, Kondo, N., additional, Kudo, H., additional, Morimoto, K., additional, Morita, K., additional, Murakami, M., additional, Nishio, K., additional, Omtvedt, J. P., additional, Ooe, K., additional, Qin, Z., additional, Sato, D., additional, Sato, N., additional, Sato, T. K., additional, Shigekawa, Y., additional, Shinohara, A., additional, Takeyama, M., additional, Tanaka, T., additional, Toyoshima, A., additional, Tsukada, K., additional, Wakabayashi, Y., additional, Wang, Y., additional, Wulff, S., additional, Yamaki, S., additional, Yano, S., additional, Yasuda, Y., additional, and Yokokita, T., additional

Published
2020
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19. Synthesis and chemical investigation of Sg(CO)$_6$

Author

Even, J., Yakushev, A., Düllmann, C. E., Haba, H., Asai, M., Sato, T. K., Brand, H., Di Nitto, A., Eichler, R., Fan, F. L., Hartmann, Willi, Huang, M., Jäger, E., Kaji, D., Kanaya, J., Kaneya, Y., Khuyagbaatar, J., Kindler, B., Kratz, J. V., Krier, J., Kudou, Y., Kurz, N., Lommel, B., Miyashita, S., Morimoto, K., Morita, K., Murakami, M., Nagame, Y., Nietsche, H., Ooe, K., Qin, Z., Schädel, M., Steiner, J., Sumita, T., Takeyama, M., Tanaka, K., Toyoshima, A., Tsukada, K., Türler, A., Usoltsev, I., Wakabayashi, Y., Wang, Y., Wiehl, N., and Yamaki, S.

Subjects
Physics
Abstract

GSI Scientific Report 2014 - GSI Report 2015-1

Published
2015
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21. Decomposition studies of group 6 hexacarbonyl complexes. Part 1: Production and decomposition of Mo(CO)6 and W(CO)6

Author

Usoltsev, I., primary, Eichler, R., additional, Wang, Y., additional, Even, J., additional, Yakushev, A., additional, Haba, H., additional, Asai, M., additional, Brand, H., additional, Di Nitto, A., additional, Düllmann, Ch.E., additional, Fangli, F., additional, Hartmann, W., additional, Huang, M., additional, Jäger, E., additional, Kaji, D., additional, Kanaya, J., additional, Kaneya, Y., additional, Khuyagbaatar, J., additional, Kindler, B., additional, Kratz, J.V., additional, Krier, J., additional, Kudou, Y., additional, Kurz, N., additional, Lommel, B., additional, Miyashita, S., additional, Morimoto, K., additional, Morita, K., additional, Murakami, M., additional, Nagame, Y., additional, Nitsche, H., additional, Ooe, K., additional, Sato, T.K., additional, Schädel, M., additional, Steiner, J., additional, Steinegger, P., additional, Sumita, T., additional, Takeyama, M., additional, Tanaka, K., additional, Toyoshima, A., additional, Tsukada, K., additional, Türler, A., additional, Wakabayashi, Y., additional, Wiehl, N., additional, Yamaki, S., additional, and Qin, Z., additional

Published
2015
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24. Development of a new continuous dissolution apparatus with a hydrophobic membrane for superheavy element chemistry

Author

Ooe, K., primary, Attallah, M. F., additional, Asai, M., additional, Goto, N., additional, Gupta, N. S., additional, Haba, H., additional, Huang, M., additional, Kanaya, J., additional, Kaneya, Y., additional, Kasamatsu, Y., additional, Kitatsuji, Y., additional, Kitayama, Y., additional, Koga, K., additional, Komori, Y., additional, Koyama, T., additional, Kratz, J. V., additional, Lerum, H. V., additional, Miyashita, S., additional, Oshimi, Y., additional, Pershina, V., additional, Sato, D., additional, Sato, T. K., additional, Shigekawa, Y., additional, Shinohara, A., additional, Tanaka, A., additional, Toyoshima, A., additional, Tsukada, K., additional, Tsuto, S., additional, Yokokita, T., additional, Yokoyama, A., additional, Omtvedt, J. P., additional, Nagame, Y., additional, and Schädel, M., additional

Published
2014
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25. Chemical studies of Mo and W in preparation of a seaborgium (Sg) reduction experiment using MDG, FEC, and SISAK

Author

Toyoshima, A., primary, Ooe, K., additional, Miyashita, S., additional, Asai, M., additional, Attallah, M. F., additional, Goto, N., additional, Gupta, N. S., additional, Haba, H., additional, Huang, M., additional, Kanaya, J., additional, Kaneya, Y., additional, Kasamatsu, Y., additional, Kitatsuji, Y., additional, Kitayama, Y., additional, Koga, K., additional, Komori, Y., additional, Koyama, T., additional, Kratz, J. V., additional, Lerum, H. V., additional, Oshimi, Y., additional, Pershina, V., additional, Sato, D., additional, Sato, T. K., additional, Shigekawa, Y., additional, Shinohara, A., additional, Tanaka, A., additional, Tsukada, K., additional, Tsuto, S., additional, Yokokita, T., additional, Yokoyama, A., additional, Omtvedt, J. P., additional, Nagame, Y., additional, and Schädel, M., additional

Published
2014
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29. Production of265Sg in the248Cm(22Ne,5n)265Sg reaction and decay properties of two isomeric states in265Sg

Author

Haba, H., primary, Kaji, D., additional, Kudou, Y., additional, Morimoto, K., additional, Morita, K., additional, Ozeki, K., additional, Sakai, R., additional, Sumita, T., additional, Yoneda, A., additional, Kasamatsu, Y., additional, Komori, Y., additional, Shinohara, A., additional, Kikunaga, H., additional, Kudo, H., additional, Nishio, K., additional, Ooe, K., additional, Sato, N., additional, and Tsukada, K., additional

Published
2012
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30. Solvent extraction of trivalent actinides with di(2-ethylhexyl) phosphoric acid

Author

Takayama, R., primary, Ooe, K., additional, Yahagi, W., additional, Fujisawa, H., additional, Komori, Y., additional, Kikunaga, H., additional, Yoshimura, T., additional, Takahashi, N., additional, Takahisa, K., additional, Haba, H., additional, Kudou, Y., additional, Ezaki, Y., additional, Toyoshima, T., additional, Asai, M., additional, Nagame, Y., additional, Saito, T., additional, Mitsugashira, T., additional, and Shinohara, A., additional

Published
2011
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31. Precision measurement of the half-life of 90mNb and 99mTc

Author

Kikunaga, H., primary, Fujisawa, H., additional, Ooe, K., additional, Takayama, R., additional, Shinohara, A., additional, Takamiya, K., additional, Kasamatsu, Y., additional, Ezaki, Y., additional, Haba, H., additional, Nakanishi, T., additional, Mitsugashira, T., additional, Hirose, H., additional, and Ohtsuki, T., additional

Published
2011
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33. Production and decay properties of the 1.9-s isomeric state inRf261

Author

Haba, H., primary, Kaji, D., additional, Kikunaga, H., additional, Kudou, Y., additional, Morimoto, K., additional, Morita, K., additional, Ozeki, K., additional, Sumita, T., additional, Yoneda, A., additional, Kasamatsu, Y., additional, Komori, Y., additional, Ooe, K., additional, and Shinohara, A., additional

Published
2011
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34. Extraction Chromatographic Behavior of Rf, Zr, and Hf in HCl Solution with Styrenedivinylbenzene Copolymer Resin Modified by TOPO (trioctylphosphine oxide)

Author

Toyoshima, A., primary, Kasamatsu, Y., additional, Tsukada, K., additional, Asai, M., additional, Ishii, Y., additional, Toume, H., additional, Nishinaka, I., additional, Sato, T. K., additional, Nagame, Y., additional, Schädel, M., additional, Haba, H., additional, Goto, S., additional, Kudo, H., additional, Akiyama, K., additional, Oura, Y., additional, Ooe, K., additional, Shinohara, A., additional, Sueki, K., additional, and Kratz, J. V., additional

Published
2010
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35. Decay Properties of [sup 266]Bh and [sup 262]Db Produced in the [sup 248]Cm+[sup 23]Na Reaction—Further Confirmation of the [sup 278]113 Decay Chain—

Author

Morita, K., primary, Morimoto, K., additional, Kaji, D., additional, Haba, H., additional, Ozeki, K., additional, Kudou, Y., additional, Sato, N., additional, Sumita, T., additional, Yoneda, A., additional, Ichikawa, T., additional, Fujimori, Y., additional, Goto, S., additional, Ideguchi, E., additional, Kasamatsu, Y., additional, Katori, K., additional, Komori, Y., additional, Koura, H., additional, Kudo, H., additional, Ooe, K., additional, Ozawa, A., additional, Tokanai, F., additional, Tsukada, K., additional, Yamaguchi, T., additional, Yoshida, A., additional, Susa, Hajime, additional, Arnould, Marcel, additional, Gales, Sydney, additional, Motobayashi, Tohru, additional, Scheidenberger, Christoph, additional, and Utsunomiya, Hiroaki, additional

Published
2010
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38. Blood Plasma Separation Device using Capillary Phenomenon

Author

Khumpuang, S., primary, Tanaka, T., additional, Aita, F., additional, Meng, Z., additional, Ooe, K., additional, Ikeda, M., additional, Omori, Y., additional, Miyamura, K., additional, Yonezawa, H., additional, Matsumoto, K., additional, and Sugiyama, S., additional

Published
2007
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39. Startup of Superheavy Element Chemistry at RIKEN

Author

Haba, H., primary, Kaji, D., additional, Kikunaga, H., additional, Sato, N., additional, Akiyama, T., additional, Morimoto, K., additional, Yoneda, A., additional, Morita, K., additional, Takabe, T., additional, Tashiro, Y., additional, Kitamoto, Y., additional, Matsuo, K., additional, Saika, D., additional, Ooe, K., additional, Kuribayashi, T., additional, Yoshimura, T., additional, Shinohara, A., additional, and Toyoshima, A., additional

Published
2007
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44. Decay Properties of 266Bh and 262Db Produced in the 248Cm+23Na Reaction—Further Confirmation of the 278113 Decay Chain—.

Author

Morita, K., Morimoto, K., Kaji, D., Haba, H., Ozeki, K., Kudou, Y., Sato, N., Sumita, T., Yoneda, A., Ichikawa, T., Fujimori, Y., Goto, S., Ideguchi, E., Kasamatsu, Y., Katori, K., Komori, Y., Koura, H., Kudo, H., Ooe, K., and Ozawa, A.

Subjects
SEMICONDUCTOR nuclear counters, NUCLIDES, GAMMA decay, NUCLEAR fission, FOCAL planes, PHOTON detectors
Abstract

Decay properties of an isotope 266Bh and its daughter nucleus 262Db produced by the 248Cm(23Na,5n) reaction were studied by using a gas-filled recoil separator coupled with a position-sensitive semiconductor detector. 266Bh was clearly identified from the correlation of the known nuclide, 262Db. The obtained decay properties of 266Bh and 262Db are consistent with those observed in the 278113 chain by RIKEN collaboration, which provided further confirmation of the discovery of 278113. [ABSTRACT FROM AUTHOR]

Published
2010
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50. Decomposition studies of group 6 hexacarbonyl complexes. Part 1: Production and decomposition of Mo(CO)6and W(CO)6

Author

Usoltsev, I., Eichler, R., Wang, Y., Even, J., Yakushev, A., Haba, H., Asai, M., Brand, H., Di Nitto, A., Düllmann, Ch.E., Fangli, F., Hartmann, W., Huang, M., Jäger, E., Kaji, D., Kanaya, J., Kaneya, Y., Khuyagbaatar, J., Kindler, B., Kratz, J.V., Krier, J., Kudou, Y., Kurz, N., Lommel, B., Miyashita, S., Morimoto, K., Morita, K., Murakami, M., Nagame, Y., Nitsche, H., Ooe, K., Sato, T.K., Schädel, M., Steiner, J., Steinegger, P., Sumita, T., Takeyama, M., Tanaka, K., Toyoshima, A., Tsukada, K., Türler, A., Wakabayashi, Y., Wiehl, N., Yamaki, S., and Qin, Z.

Abstract

Chemical studies of superheavy elements require fast and efficient techniques, due to short half-lives and low production rates of the investigated nuclides. Here, we advocate for using a tubular flow reactor for assessing the thermal stability of the Sg carbonyl complex – Sg(CO)6. The experimental setup was tested with Mo and W carbonyl complexes, as their properties are established and supported by theoretical predictions. The suggested approach proved to be effective in discriminating between the thermal stabilities of Mo(CO)6and W(CO)6. Therefore, an experimental verification of the predicted Sg–CO bond dissociation energy seems to be feasible by applying this technique. By investigating the effect of 104,105Mo beta-decay on the formation of 104,105Tc carbonyl complex, we estimated the lower reaction time limit for the metal carbonyl synthesis in the gas phase to be more than 100 ms. We examined further the influence of the wall material of the recoil chamber, the carrier gas composition, the gas flow rate, and the pressure on the production yield of 104Mo(CO)6, so that the future stability tests with Sg(CO)6can be optimized accordingly.

Published
2016
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