First synthesis and investigation
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1 First synthesis and investigation ofsg(co) 6 Julia Even Helmholtz-Institut Mainz for the CO-collaboration
2 Outline Motivation towards new SHE compounds Experiments with lighter homologs Mo and W at the TRIGA Mainz reactor and at TASCA at GSI. First Sg-experiment at GARIS at RIKEN Summary and outlook
3 Gas-phase chemistry of the SHE Very limited number of compounds studied Rf: RfCl 4, RfBr 4, RfOCl 2 Db: (DbCl 5 ), DbBr 5, DbOCl 3 Sg: SgO 2 Cl 2, SgO 2 (OH) 2 Bh: BhO 3 Cl Hs: HsO 4, Na 2 [HsO 4 (OH) 2 ] Cn and Fl in their elemental states New compound classes are of interest!
4 Binary Metal Carbonyl Complexes V(CO) 6 Cr(CO) 6 Mn 2 (CO) 10 Fe(CO) 5 Co 2 (CO) 8 Ni(CO) 4 Mo(CO) 6 Tc 2 (CO) 10 Ru(CO) 5 Rh 2 (CO) 8 W(CO) 6 Re 2 (CO) 10 Os(CO) 5 Ir 4 (CO) 12 Sg(CO) 6? Hs(CO) 5? Highly symmetric complexes with zero valent central metal atoms
5 the TRIGA Mainz reactor Pressure control Reactor N 2 Mass flow controller 249 Cf Beam port A Charcoal trap CO Mass flow controller γ
6 the TRIGA Mainz reactor Pressure control Reactor N 2 Mass flow controller 249 Cf Beam port A Charcoal trap CO Mass flow controller γ
7 Transport with pure N Xe m I I Xe counts per channel Xe 134 I 139 Xe 136 I 137 Xe β Cs E / kev
8 Transport with N 2 / CO mixtures 104 Mo 105 Mo 107 Tc 109 counts per channel Tc Rh 103 Tc 105 Mo 139 Xe 109 Rh 138 Xe134 I 108 Ru 107 Rh 103 Tc 139 Xe 109 Rh 103 Tc 110m Rh 84 Se 109 Rh 136 Xe β Tc 140 Cs 136m I 104 Tc 137 Xe 105 Ru 103 Tc 136 I 106 Mo I Xe Se Mo Tc Ru Rh E / kev J. Even et al. Radiochim. Acta (2014)
9 Isothermal chromatography - IC Pressure control Reactor 249 Cf N 2 MFC 1 SICA- PENT Beam port A IC Charcoal trap CO MFC 2 MFC 3 γ Pump
10 IC of Mo(CO) 6 on SiO 2 - H ads = 42.5 ± 2.5 kj/mol Physisorption J. Even et al., Inorg. Chem. 51, 6431 (2012).
11 Limits of In-situ CO-chemistry CO M. Huang, et al.: Production of 179m W in the form of carbonyl complex, RIKEN Accel. Prog. Rep. 47 (in press 2014) Y. Wang, et al., Radiochim. Acta 102, (2014).
12 Limits of In-situ CO-chemistry CO M. Huang, et al.: Production of 179m W in the form of carbonyl complex, RIKEN Accel. Prog. Rep. 47 (in press 2014) Y. Wang, et al., Radiochim. Acta 102, (2014).
13 Limits of In-situ CO-chemistry CO M. Huang, et al.: Production of 179m W in the form of carbonyl complex, RIKEN Accel. Prog. Rep. 47 (in press 2014) Y. Wang, et al., Radiochim. Acta 102, (2014).
14 Physical Preseparation TransActinide Separator and Chemistry Apparatus J. Even et al., NIMA 638 (2011) 157 Ch.E. Düllmann et al., NIMA 551 (2005) 528 A. Semchenkov et al., NIMB 266 (2008) 4153 M. Schädel, Eur. Phys. J. D 45 (2007) 67
15 Thermochromatography at TASCA TASCA RTC 144 Sm( 24 Mg,4-5n) 163,164 W 152 Gd( 24 Mg,5-6n) 170,171 Os He MFC 2 Molecular sieve COMPACT N 2(L) MFC 3 CO MFC 1 Pump
16 Thermochromatograms Yield / % Measurement Simulation 43.5 kj/mol Temperature Measurement Simulation 46.5 kj/mol Temperature Detector pair J. Even et al., Inorg. Chem. 51, 6431 (2012) Os(CO) 5 - Hads: kj/mol T / C -3.5 W(CO) 6 - Hads: 46.5±2.5 kj/mol Physisorption
17 Sg-265: Production and decay 248 Cm( 22 Ne,5n) σ = 180 /200 pb H. Haba et al. ; Phys. Rev. C 85, (2012).
18 CO-Collaborators J. Even 1, D. Ackermann 2, M. Asai 5, M. Block 1,2, H. Brand 2, A. Di Nitto 3, Ch.E. Düllmann 1,2,3, R. Eichler 6,7, F. Fanglih 8, H. Haba 4, W. Hartmann 2, F.P. Hessberger 2, M. Huang 4, E. Jäger 2, D. Kaji 4, J. Kanaya 4, Y. Kaneya 5, J. Khuyagbaatar 1, B. Kindler 2, J.V. Kratz 3 ; J.Krier 2,Y. Kudou 4, N. Kurz 2, B. Lommel 2, J. Maurer 2, S. Miyashita 5,9, K. Morimoto 4, K. Morita 4,10, M. Murakami 4,11 Y. Nagame 5, H. Nitsche 12,13, K. Ooe 11, Z. Qin 8, T. K. Sato 5, M. Schädel 5, J. Steiner 2, T. Sumita 4, M. Takeyama 4, K. Tanaka 4, A. Toyoshima 5, K. Tsukada 5, A. Türler 6,7, I. Usoltsev 6,7, Y. Wakabayashi 4, Y. Wang 8, N. Wiehl 1,3, A. Yakushev 2, S. Yamaki 4,14 1 Helmholtz-Institut Mainz, Mainz, Germany; 2 GSI Helmholtzzentrum für Schwerionenforschung, Planckstr. 1, Darmstadt, Germany; 3 Johannes Gutenberg-Universität Mainz, Mainz, Germany; 4 Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama , Japan; 5 Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki , Japan; 6 University of Berne, Freiestrasse 3, 3012 Berne, Switzerland; 7 Paul Scherrer Institute, 5232 Villigen, Switzerland; 8 Institute of Modern Physics; Chinese Academy of Sciences, 509 Nanchang Road, CN ; Lanzhou; China; 9 Hiroshima University, Kagamiyama, Higashi-Hiroshima , Japan 10 Kyushu University, Higashi-Ku, Fukuoka, , Japan. 11 Niigata University, Niigata, Niigata , Japan; 12 University of California, Berkeley, CA ; U.S.A.; 13 Lawrence Berkeley National Laboratory, Berkeley, CA U.S.A.; 14 Saitama University, Saitama , Japan.
19 First synthesis of Sg(CO) 6 at GARIS J. Even et al. Science 345, 1491 (2014).
20 Observed Sg decay chains J. Even et al. Science 345, 1491 (2014).
21 Chemistry and transport yield Total beam integral: ~10 19 Independent yield reference measurement (18 correlations plus 10 SF events beam integral 2*10 18 ) Chemistry and Transport Efficiency: ~2% Kinetics or technical problem?
22 Improvements new RTC new gas-cleaning cartridges QMS
23 November beam time Total beam integral 5.54 MeV/u) 5.17* > Efficiencyimprovedby a factor of 3 J. Even et al. Science 345, 1491 (2014).
24 Distribution in COMPACT t 1/2 87 Mo: 13.7 s 88 Mo: 8.0 min 164 W: 6.0 s 265a Sg: 8.5 s 265a Sg: 14.4 s J. Even et al. Science 345, 1491 (2014). In agreement with theoretical predictions - V. Pershina, J. Anton; J.Phys.Chem. 138, (2013)174301
25 Observed Sg decay chains
26 Background free spectra Sg Rf Beam dose: 4.35*10 17 particles. Total spectrum of all 32 COMPACT detector pairs J. Even et al. submitted to J. Radioanal. Nucl. Chem. (2014).
27 New decay properties J. Even et al. submitted to J. Radioanal. Nucl. Chem. (2014).
28 Summary and outlook Fast technique for online synthesis of carbonyl complexes of short-lived isotopes First chemicalinvestigationofsg(co) 6 Similar adsorption behaviour of Mo(CO) 6,W(CO) 6 and Sg(CO) 6 on SiO 2 in agreement with theoreticla predicions Sensitivity for long-lived nuclei Background-free nuclear spectroscopy experiments Chemical system for ALBEGA
29 Thanks to... RI Beam Factory operated by RIKEN Nishina Center and CNS, University of Tokyo. ion source and RILAC operators. BMBF under contract 06MZ7164 JAEA Tokai, Advanced Science Research Center's Reimei research Swiss National Science Foundation is gratefully acknowledged Thank you for your attention!
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