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First Ionization Potentials of Fm, Md, No, and Lr: Verification of Filling-Up of 5f Electrons and Confirmation of the Actinide Series
/ Sato, Tetsuya K (JAEA, Ibaraki) ; Asai, Masato (JAEA, Ibaraki) ; Borschevsky, Anastasia (Groningen U.) ; Beerwerth, Randolf (Jena U., TPI) ; Kaneya, Yusuke (JAEA, Ibaraki) ; Makii, Hiroyuki (JAEA, Ibaraki) ; Mitsukai, Akina (JAEA, Ibaraki) ; Nagame, Yuichiro (JAEA, Ibaraki) ; Osa, Akihiko (JAEA, Ibaraki) ; Toyoshima, Atsushi (JAEA, Ibaraki) et al.
We report the first ionization potentials (IP1) of the heavy actinides, fermium (Fm, atomic number Z = 100), mendelevium (Md, Z = 101), nobelium (No, Z = 102), and lawrencium (Lr, Z = 103), determined using a method based on a surface ionization process coupled to an online mass separation technique in an atom-at-a-time regime. The measured IP1 values agree well with those predicted by state-of-the-art relativistic calculations performed alongside the present measurements. [...]
2018 - 5 p.
- Published in : J. Am. Chem. Soc. 140 (2018) 14609-14613
Fulltext: PDF;
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2.
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First ionization potential of the heaviest actinide lawrencium, element 103
/ Sato, Tetsuya K (JAEA, Ibaraki) ; Asai, Masato (JAEA, Ibaraki) ; Borschevsky, Anastasia (Groningen U.) ; Stora, Thierry (CERN ; Gottingen U.) ; Sato, Nozomi (JAEA, Ibaraki) ; Kaneya, Yusuke (JAEA, Ibaraki ; Ibaraki U., Grad. Sch. Sci. Eng.) ; Tsukada, Kazuaki (JAEA, Ibaraki) ; Düllmann, Christoph E (Helmholtz Inst., Mainz ; Darmstadt, GSI ; Mainz U., Inst. Kernphys.) ; Eberhardt, Klaus (Helmholtz Inst., Mainz ; Mainz U., Inst. Kernphys.) ; Eliav, Ephraim (Tel Aviv U.) et al.
The first ionization potential (IP1) of element 103, lawrencium (Lr), has been successfully determined for the first time by using a newly developed method based on a surface ionization process. The measured IP1 value is 4.9630.080.07 eV. [...]
2016 - 6 p.
- Published in : EPJ Web Conf. 131 (2016) 05001
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3.
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Experimental study of the $^{15}$O(2 p , γ) $^{17}$Ne cross section by Coulomb Dissociation for the rp process
/ Marganiec, J (Darmstadt, EMMI ; Michigan State U., JINA) ; Warners, F (Darmstadt, EMMI ; Darmstadt, Tech. U. ; Darmstadt, GSI ; Frankfurt U., FIAS) ; Aksouh, F (Darmstadt, GSI ; King Saud U.) ; Aksyutina, Y (Darmstadt, GSI) ; Alvarez Pol, H (U. Santiago de Compostela (main)) ; Aumann, T (Darmstadt, GSI ; Darmstadt, Tech. U.) ; Beceiro, S (U. Santiago de Compostela (main)) ; Bertulani, C (Texas A-M, Commerce) ; Boretzky, K (Darmstadt, GSI) ; Borge, MJ (Madrid, Inst. Estructura Materia) et al.
2016
- Published in : J. Phys.: Conf. Ser. 665 (2016) 012046
Fulltext: PDF;
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4.
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Three-body correlations in electromagnetic dissociation of Borromean nuclei: The 6 He case
/ Chulkov, L V (Darmstadt, GSI ; Kurchatov Inst., Moscow) ; Simon, H (Darmstadt, GSI) ; Thompson, I J (Surrey U.) ; Aumann, T (Darmstadt, GSI ; Mainz U., Inst. Kernphys.) ; Borge, M J G (Madrid, Inst. Estructura Materia) ; Elze, Th W (Frankfurt U., Inst. Kernphys.) ; Emling, H (Darmstadt, GSI) ; Geissel, H (Darmstadt, GSI) ; Grigorenko, L V (Darmstadt, GSI ; Kurchatov Inst., Moscow) ; Hellström, M (Darmstadt, GSI) et al.
Dissociation of 6 He on a lead target has been studied at 240 MeV/u. The four-momenta of the two neutrons in coincidence with α -particles have been measured and used to reconstruct the three-body energy and angular correlations in the final state. [...]
2005 - 20 p.
- Published in : Nucl. Phys. A 759 (2005) 23-42
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5.
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Two- and three-body correlations: breakup of halo nuclei
/ Simon, H (Darmstadt, GSI ; Darmstadt, Tech. Hochsch.) ; Aumann, T (Darmstadt, GSI) ; Borge, M J G (Madrid, Inst. Estructura Materia) ; Chulkov, L V (Darmstadt, GSI ; Kurchatov Inst., Moscow) ; Elze, Th W (Frankfurt U., Inst. Kernphys.) ; Emling, H (Darmstadt, GSI) ; Forsse´n, C (U. Gothenburg (main)) ; Geissel, H (Darmstadt, GSI) ; Hellstro¨m, M (Darmstadt, GSI) ; Jonson, B (U. Gothenburg (main)) et al.
Nuclear knockout reactions at relativistic energies provide a sensitive tool to determine the ground state properties of nuclei close to the drip line. Studies with kinematically complete measurements reveal the initial correlations in the reacting systems and yield spectroscopic information on the continuum states populated in the decay channel. [...]
2004 - 4 p.
- Published in : Nucl. Phys. A 734 (2004) 323-326
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6.
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Development of a He/CdI$_2$ gas-jet system coupled to a surface-ionization type ion-source in JAEA-ISOL: towards determination of the first ionization potential of Lr (Z = 103)
/ Sato, T K (JAEA, Ibaraki) ; Asai, M (JAEA, Ibaraki) ; Sato, N (JAEA, Ibaraki) ; Tsukada, K (JAEA, Ibaraki) ; Toyoshima, A (JAEA, Ibaraki) ; Ooe, K (Niigata U. (main)) ; Miyashita, S (Hiroshima U. (main)) ; Kaneya, Y (JAEA, Ibaraki ; Ibaraki U., Grad. Sch. Sci. Eng.) ; Osa, A (JAEA, Ibaraki) ; Schädel, M (JAEA, Ibaraki) et al.
We report on development of a gas-jet transport system coupled to a surface ionization ion-source in the JAEA-ISOL (Isotope Separator On-Line) system. As a new aerosol material for the gas-jet system, CdI2, which has a low boiling point of 713 °C, is exploited to prevent deposition of the aerosol material on the surface of the ion-source. [...]
2015
- Published in : J. Radioanal. Nucl. Chem. 303 (2015) 1253-1257
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7.
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Studies of continuum states in${16}$ Ne using three-body correlation techniques
/ Marganiec, J ; Wamers, F ; Aksouh, F ; Aksyutina, Yu ; Alvarez-Pol, H ; Aumann, T ; Beceiro-Novo, S ; Boretzky, K ; Borge, M J G (CERN) ; Chartier, M et al.
Two-proton decay of the unbound $ T_{z} =-2$ nucleus$^{16}$Ne , produced in one-neutron knockout from a 500 MeV/u$^{17}$Ne beam, has been studied at GSI. The ground state, at a resonance energy 1.388(15) MeV, ( $ \Gamma =0.082(15)$ MeV) above the$^{14}$O +p+p threshold, and two narrow resonances at $ E_{r} =3.220(46)$ MeV and 7.57(6) MeV have been investigated. [...]
2015
- Published in : Eur. Phys. J. A 51 (2015) 9
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8.
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Study of the $^{15}$O$(2p,\gamma )^{17}$Ne Cross Section by Coulomb Dissociation of $^{17}$Ne for the $rp$ Process of Nucleosynthesis
/ Marganiec, J (Darmstadt, EMMI ; Notre Dame U.) ; Wamers, F ; Aksouh, F ; Aksyutina, Y ; Alvarez Pol, H (Santiago de Compostela U.) ; Aumann, T ; Beceiro, S ; Bertulani, C ; Boretzky, K ; Borge, M J G et al.
2014
- Published in : Acta Phys. Pol. B 45 (2014) 229
In : 33rd Mazurian Lakes Conference on Physics: Frontiers in Nuclear Physics, Piaski, Poland, 1 - 7 Sep 2013, pp.229
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9.
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Measurement of the first ionization potential of lawrencium (element 103)
/ Sato, T K (JAERI, Tokai) ; Asai, M (JAERI, Tokai) ; Borschevsky, A (Massey U., NZIAS ; Helmholtz Inst., Mainz) ; Stora, T (CERN) ; Sato, N (JAERI, Tokai) ; Kaneya, Y (JAERI, Tokai ; Ibaraki U., Grad. Sch. Sci. Eng.) ; Tsukada, K (JAERI, Tokai) ; Düllmann, Ch E (Helmholtz Inst., Mainz ; Darmstadt, GSI ; Mainz U., Inst. Kernchem.) ; Eberhardt, K (Helmholtz Inst., Mainz ; Mainz U., Inst. Kernchem.) ; Eliav, E (Tel Aviv U. (main)) et al.
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. [...]
2015
- Published in : Nature 520 (2015) 209-211
Nature's cover featuring the article: PDF; Preprint: PDF;
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10.
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Nuclear astrophysics with radioactive ions at FAIR
/ Reifarth, R. ; Altstadt, S. ; Göbel, K. ; Heftrich, T. ; Heil, M. ; Koloczek, A. ; Langer, C. ; Plag, R. ; Pohl, M. ; Sonnabend, K. et al.
The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those processes, because they are shielded from the s-process flow and r-process beta-decay chains. [...]
arXiv:1310.1632.-
2016-01-05 - 12 p.
- Published in : J. Phys.: Conf. Ser. 665 (2016) 012044
Fulltext: pdf - PDF; 10.1088_1742-6596_665_1_012044 - PDF; arXiv:1310.1632 - PDF; External link: Preprint
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