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1.
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Smooth trends in fermium charge radii and the impact of shell effects
/ Warbinek, Jessica (Darmstadt, GSI ; Mainz U. ; CERN ; Helmholtz Inst., Mainz) ; Rickert, Elisabeth (Darmstadt, GSI ; Mainz U. ; Helmholtz Inst., Mainz) ; Raeder, Sebastian (Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Albrecht-Schönzart, Thomas (Colorado School of Mines) ; Andelic, Brankica (Darmstadt, GSI ; Helmholtz Inst., Mainz ; Groningen U.) ; Auler, Julian (Mainz U.) ; Bally, Benjamin (IRFU, Saclay) ; Bender, Michael (IP2I, Lyon) ; Berndt, Sebastian (Mainz U.) ; Block, Michael (Darmstadt, GSI ; Mainz U. ; Helmholtz Inst., Mainz) et al.
The quantum-mechanical nuclear-shell structure determines the stability and limits of the existence of the heaviest nuclides with large proton numbers Z ≳ 100 (refs. $^{1–3}$). [...]
2024 - 5 p.
- Published in : Nature 634 (2024) 1075-1079
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Nuclear moments and isotope shifts of the actinide isotopes Cf249–253 probed by laser spectroscopy
/ Weber, Felix (Mainz U., Inst. Phys.) ; Albrecht-Schönzart, Thomas E (Florida State U.) ; Allehabi, Saleh O (New South Wales U.) ; Berndt, Sebastian (Mainz U., Inst. Phys. ; Mainz U.) ; Block, Michael (Darmstadt, GSI ; Mainz U. ; Helmholtz Inst., Mainz) ; Dorrer, Holger (Mainz U.) ; Düllmann, Christoph E (Darmstadt, GSI ; Mainz U. ; Helmholtz Inst., Mainz) ; Dzuba, Vladimir A (New South Wales U.) ; Ezold, Julie G (Oak Ridge) ; Flambaum, Victor V (New South Wales U.) et al.
We report on high-resolution laser spectroscopy studies on Cf249–253 with spectral linewidths in the order of 100 MHz carried out at the RISIKO mass separator at Mainz University. In total three atomic ground-state transitions were investigated and the hyperfine parameters for the odd-A isotopes and isotope shift for all examined isotopes have been determined from the measured spectra. [...]
2023 - 10 p.
- Published in : Phys. Rev. C 107 (2023) 034313
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3.
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Opportunities for Fundamental Physics Research with Radioactive Molecules
/ Arrowsmith-Kron, Gordon (Michigan State U.) ; Athanasakis-Kaklamanakis, Michail (CERN ; Leuven U.) ; Au, Mia (CERN ; Mainz U.) ; Ballof, Jochen (CERN ; Michigan State U.) ; Berger, Robert (Philipps U. Marburg) ; Borschevsky, Anastasia (U. Groningen, VSI) ; Breier, Alexander A. (Kassel U.) ; Buchinger, Fritz (McGill U.) ; Budker, Dmitry (Darmstadt, GSI ; UC, Berkeley) ; Caldwell, Luke (JILA, Boulder ; U. Colorado, Boulder ; Colorado U.) et al.
Molecules containing short-lived, radioactive nuclei are uniquely positioned to enable a wide range of scientific discoveries in the areas of fundamental symmetries, astrophysics, nuclear structure, and chemistry. Recent advances in the ability to create, cool, and control complex molecules down to the quantum level, along with recent and upcoming advances in radioactive species production at several facilities around the world, create a compelling opportunity to coordinate and combine these efforts to bring precision measurement and control to molecules containing extreme nuclei. [...]
arXiv:2302.02165.-
2024-07-12 - 119 p.
- Published in : Rep. Prog. Phys. 87 (2024) 084301
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4.
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The Electron Capture in $^{163}$Ho Experiment - a Short Update
/ Kovac, Neven (Kirchhoff Inst. Phys.) ; Ahrens, Felix (Kirchhoff Inst. Phys.) ; Barth, Arnulf (Kirchhoff Inst. Phys.) ; Berndt, Sebastian (Mainz U. ; Mainz U., Inst. Phys.) ; Blaum, Klaus (Heidelberg, Max Planck Inst.) ; Brass, Martin (U. Heidelberg, ITP) ; Bruer, Erik (Kirchhoff Inst. Phys.) ; Door, Menno (Heidelberg, Max Planck Inst.) ; Dorrer, Holger (Mainz U.) ; Düllmann, Christoph (Mainz U.) et al.
The definition of the absolute neutrino mass scale is one of the main goals of the Particle Physics today.
The study of the end-point regions of the $\beta$- and electron capture (EC) spectrum offers a possibility to determine the effective electron (anti-)neutrino mass in a completely model independent way, as it only relies on the energy and momentum conservation. [...]
2022 - 4 p.
- Published in : PoS EPS-HEP2021 (2022) 211
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In : European Physics Society conference on High Energy Physics 2021, Online, Online, 26 - 30 Jul 2021, pp.211
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5.
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A cold electron-impact ion source driven by a photo-cathode – New opportunities for the delivery of radioactive molecular beams?
/ Ballof, Jochen (CERN ; Mainz U.) ; Au, Mia (CERN ; Mainz U.) ; Barbero, Ermanno (CERN) ; Chrysalidis, Katerina (CERN) ; Düllmann, Christoph E. (Mainz U. ; Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Fedosseev, Valentin (CERN) ; Granados, Eduardo (CERN) ; Heinke, Reinhard (CERN) ; Marsh, Bruce A. (CERN) ; Owen, Michael (CERN) et al.
The thick-target ISOL (Isotope mass Separation OnLine) method provides beams of more than 1000 radionuclides of 74 elements. The method is well established for elements with sufficiently high volatility at ca. [...]
arXiv:2110.00651.-
2022 - 8 p.
- Published in : J. Phys. : Conf. Ser. 2244 (2022) 012072
Fulltext: document - PDF; 2110.00651 - PDF;
In : 19th International Conference on Ion Sources (ICIS 2021), Vancouver, BC, Canada, 20 - 24 Sep 2021, pp.012072
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6.
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In-source laser resonance ionization spectroscopy of neptunium and plutonium
/ Au, Mia (SY-STI, CERN, Switzerland, Johannes Gutenberg-Universit{\"a}t Mainz, Germany) ; Borschevsky, Anastasia (Rijksuniversiteit Groningen, Groningen, Netherlands) ; Chrysalidis, Katerina (SY-STI, CERN, Switzerland) ; Crosa-Rossa, Raphaël (Rijksuniversiteit Groningen, Groningen, Netherlands) ; Düllmann, Christoph (Johannes Gutenberg-Universit{\"a}t Mainz, Germany) ; Heinke, Reinhard (SY-STI, CERN, Switzerland) ; Jaradat, Asar (SY-STI, CERN, Switzerland) ; Kaja, Magdalena (Johannes Gutenberg-Universit{\"a}t Mainz, Germany) ; Marsh, Bruce (SY-STI, CERN, Switzerland) ; Moore, Iain (University of Jyv{\"a}skyl{\"a}, Finland) et al.
CERN-INTC-2022-028 ; INTC-I-243.
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2022.
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7.
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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
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Production, isolation and characterization of radiochemically pure 163Ho samples for the ECHo-project
/ Dorrer, Holger (Mainz U. ; Bern U. ; PSI, Villigen) ; Chrysalidis, Katerina (Mainz U.) ; Goodacre, Thomas Day (CERN ; Manchester U.) ; Düllmann, Christoph E (Mainz U. ; Darmstadt, GS) ; Eberhardt, Klaus (Mainz U.) ; Enss, Christian (Heidelberg U.) ; Gastaldo, Loredana (Heidelberg U.) ; Haas, Raphael (Mainz U.) ; Harding, Jonathan (Mainz U. ; Cardiff U.) ; Hassel, Clemens (Heidelberg U.) et al.
Several experiments on the study of the electron neutrino mass are based on high-statistics measurements of the energy spectrum following electron capture of the radionuclide $^{163}$Ho. They rely on the availability of large, radiochemically pure samples of $^{163}$Ho. [...]
2018 - 13 p.
- Published in : Radiochim. Acta 106 (2018) 535-547
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9.
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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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