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High-resolution laser spectroscopy of singly charged natural uranium isotopes
/ Raggio, Andrea (Jyvaskyla U.) ; Block, Michael (Darmstadt, GSI ; Mainz U., Inst. Phys. ; Helmholtz Inst., Mainz) ; Campbell, Paul (Manchester U.) ; Cheal, Bradley (Liverpool U.) ; deGroote, Ruben P (Jyvaskyla U. ; KU Leuven, Dept. Phys. Astron.) ; Gins, Wouter (Jyvaskyla U.) ; Koszorús, Ágota (Liverpool U. ; KU Leuven, Dept. Phys. Astron.) ; Moore, Iain D (Jyvaskyla U.) ; Ortiz-Cortes, Alejandro (Jyvaskyla U. ; GANIL ; Michigan State U., East Lansing (main)) ; Pohjalainen, Ilkka (Jyvaskyla U.) et al.
High-resolution collinear laser spectroscopy has been performed on singly charged ions of $^{234,235,238}$U at the IGISOL facility of the Accelerator Laboratory, University of Jyväskylä, in Finland. Ten ionic transitions from the $^{4}\hbox {I}_{9/2}$ and $^{6}\hbox {L}_{11/2}$ ground and first excited states were measured in the 300 nm wavelength range, improving the precision of the hyperfine parameters of the lower states in addition to providing newly measured values for the upper levels. [...]
2024 - 9 p.
- Published in : Sci. Rep. 14 (2024) 25621
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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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Radiative lifetime of the A 2Π1/2 state in RaF with relevance to laser cooling
/ ISOLDE Collaboration
The radiative lifetime of the $A$$^2 \Pi_{1/2}$ (v=0) state in radium monofluoride (RaF) is measured to be 35(1) ns. The lifetime of this state and the related decay rate $\Gamma = 2.86(8) \times 10^7$$s^{-1}$ are of relevance to the laser cooling of RaF via the optically closed $A$$^2 \Pi_{1/2} \leftarrow X$$^2\Sigma_{1/2}$ transition, which makes the molecule a promising probe to search for new physics. [...]
arXiv:2403.09336.-
2024-07-22 - 8 p.
- Published in : Phys. Rev. A 110 (2024) L010802
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High-Precision Mass Measurements of Neutron Deficient Silver Isotopes Probe the Robustness of the <math display="inline"><mrow><mi>N</mi><mo>=</mo><mn>50</mn></mrow></math> Shell Closure
/ Ge, Zhuang (Jyvaskyla U.) ; Reponen, Mikael (Jyvaskyla U.) ; Eronen, Tommi (Jyvaskyla U.) ; Hu, Baishan (TRIUMF ; ORNL, Oak Ridge (main) ; Oak Ridge) ; Kortelainen, Markus (Jyvaskyla U.) ; Kankainen, Anu (Jyvaskyla U.) ; Moore, Iain (Jyvaskyla U.) ; Nesterenko, Dmitrii (Jyvaskyla U.) ; Yuan, Cenxi (SYSU, Guangzhou) ; Beliuskina, Olga (Jyvaskyla U.) et al.
High-precision mass measurements of exotic $^{95-97}$Ag isotopes close to the $N = Z$ line have been conducted with the JYFLTRAP double Penning trap mass spectrometer, with the silver ions produced using the recently commissioned inductively-heated hot cavity catcher laser ion source at the Ion Guide Isotope Separator On-Line facility. The atomic mass of $^{95}$Ag was directly determined for the first time. [...]
arXiv:2401.07976.-
2024-09-26 - 9 p.
- Published in : Phys. Rev. Lett. 133 (2024) 132503
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Nuclear charge radius of $^{26m}$Al and its implication for V$_{ud}$ in the quark-mixing matrix
/ Plattner, P. (CERN ; Innsbruck U. ; Heidelberg, Max Planck Inst.) ; Wood, E. (Liverpool U.) ; Ayoubi, L. Al (Jyvaskyla U.) ; Beliuskina, O. (Jyvaskyla U.) ; Bissell, M.L. (Manchester U. ; CERN) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Campbell, P. (Manchester U.) ; Cheal, B. (Liverpool U.) ; de Groote, R.P. (Jyvaskyla U.) ; Devlin, C.S. (Liverpool U.) et al.
Collinear laser spectroscopy was performed on the isomer of the aluminium isotope $^{26m}$Al. The measured isotope shift to $^{27}$Al in the $3s^{2}3p\;^{2}\!P^\circ_{3/2} \rightarrow 3s^{2}4s\;^{2}\!S_{1/2}$ atomic transition enabled the first experimental determination of the nuclear charge radius of $^{26m}$Al, resulting in $R_c$=\qty{3.130±.015}{\femto\meter}. [...]
arXiv:2310.15291.-
2023-11-27 - 7 p.
- Published in : Phys. Rev. Lett. 131 (2023) 222502
Fulltext: 2310.15291 - PDF; Publication - PDF;
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RAPTOR: A new collinear laser ionization spectroscopy and laser-radiofrequency double-resonance experiment at the IGISOL facility
/ Kujanpää, S. (Jyvaskyla U.) ; Raggio, A. (Jyvaskyla U.) ; de Groote, R.P. (Jyvaskyla U. ; Leuven U.) ; Athanasakis-Kaklamanakis, M. (Leuven U. ; CERN) ; Block, M. (Darmstadt, GSI ; Mainz U., Inst. Phys. ; Helmholtz Inst., Mainz) ; Candiello, A. (Leuven U.) ; Gins, W. (Jyvaskyla U.) ; Koszorús, Á. (Liverpool U.) ; Moore, I.D. (Jyvaskyla U.) ; Reponen, M. (Jyvaskyla U.) et al.
RAPTOR, Resonance ionization spectroscopy And Purification Traps for Optimized spectRoscopy, is a new collinear resonance ionization spectroscopy device constructed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the University of Jyväskylä, Finland. By operating at beam energies of under 10 keV, the footprint of the experiment is reduced compared to more traditional collinear laser spectroscopy beamlines. [...]
arXiv:2302.14637.-
2023-06-06 - 4 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 541 (2023) 388-391
Fulltext: 2302.14637 - PDF; Publication - PDF;
In : 19th International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS 2022), Daejeon, Korea, 3 - 7 Oct 2022, pp.388-391
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High-precision measurements of the hyperfine structure of cobalt ions in the deep ultraviolet range
/ Koszorús, Á (Liverpool U. ; CERN) ; Block, M (Darmstadt, GSI ; Helmholtz Inst., Mainz ; Mainz U., Inst. Phys.) ; Campbell, P (Manchester U.) ; Cheal, B (Liverpool U.) ; de Groote, R P (Jyvaskyla U. ; KU Leuven, Dept. Phys. Astron.) ; Gins, W (Jyvaskyla U.) ; Moore, I D (Jyvaskyla U.) ; Ortiz‑Cortes, A (Jyvaskyla U. ; GANIL) ; Raggio, A (Jyvaskyla U.) ; Warbinek, J (Darmstadt, GSI)
High-precision hyperfine structure measurements were performed on stable, singly-charged $^{59}$Co ions at the IGISOL facility in Jyväskylä, Finland using the collinear laser spectroscopy technique. A newly installed light collection setup enabled the study of transitions in the 230 nm wavelength range from low-lying states below 6000 cm$^{-1}$. [...]
2023 - 7 p.
- Published in : Sci. Rep. 13 (2023) 4783
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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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