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1.
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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
Fulltext: PDF;
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2.
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Long-sought isomer turns out to be the ground state of $^{76}$Cu
/ Canete, L. (Jyvaskyla U. ; Surrey U.) ; Giraud, S. (GANIL ; Michigan State U., East Lansing (main)) ; Kankainen, A. (Jyvaskyla U.) ; Bastin, B. (GANIL) ; Nowacki, F. (Strasbourg, IPHC) ; Ascher, P. (LP2I, Bordeaux) ; Eronen, T. (Jyvaskyla U.) ; Alcindor, V. Girard (GANIL ; IJCLab, Orsay) ; Jokinen, A. (Jyvaskyla U.) ; Khanam, A. (Jyvaskyla U. ; Surrey U. ; Helsinki U.) et al.
Isomers close to the doubly magic nucleus $^{78}$Ni ($Z=28$, $N=50$) provide essential information on the shell evolution and shape coexistence far from stability. The existence of a long-lived isomeric state in $^{76}$Cu has been debated for a long time. [...]
arXiv:2401.14018.-
2024-04-22 - 6 p.
- Published in : Phys. Lett. B 853 (2024) 138663
Fulltext: 2401.14018 - PDF; Publication - PDF;
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3.
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Measurements of binding energies and electromagnetic moments of silver isotopes – A complementary benchmark of density functional theory
/ de Groote, R P (Jyvaskyla U. ; Leuven U.) ; Nesterenko, D A (Jyvaskyla U.) ; Kankainen, A (Jyvaskyla U.) ; Bissell, M L (Manchester U.) ; Beliuskina, O (Jyvaskyla U.) ; Bonnard, J (York U., England ; IP2I, Lyon) ; Campbell, P (Manchester U.) ; Canete, L (Jyvaskyla U.) ; Cheal, B (Liverpool U.) ; Delafosse, C (Jyvaskyla U.) et al.
We report on a set of high-precision measurements of nuclear binding and excitation energies, as well as nuclear spins, magnetic dipole and electric quadrupole moments of neutron-rich silver isotopes, 113−123Ag. The measurements were performed using the JYFLTRAP mass spectrometer and the collinear laser spectroscopy beamline at the Ion Guide Isotope Separator On-Line (IGISOL) facility. [...]
2023 - 6 p.
- Published in : Phys. Lett. B 848 (2024) 138352
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4.
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Further evidence for shape coexistence in $^{79}$Zn$^{m}$ near doubly-magic $^{78}$Ni
/ Nies, L. (CERN ; Greifswald U.) ; Canete, L. (Jyvaskyla U. ; Surrey U.) ; Dao, D.D. (Strasbourg, IPHC) ; Giraud, S. (GANIL) ; Kankainen, A. (Jyvaskyla U.) ; Lunney, D. (IJCLab, Orsay) ; Nowacki, F. (Strasbourg, IPHC) ; Bastin, B. (GANIL) ; Stryjczyk, M. (Jyvaskyla U.) ; Ascher, P. (LP2I, Bordeaux) et al.
Isomers close to doubly-magic $^{78}_{28}$Ni$_{50}$ provide essential information on the shell evolution and shape coexistence near the ${Z=28}$ and ${N=50}$ double shell closure. We report the excitation energy measurement of the $1/2^{+}$ isomer in $^{79}_{30}$Zn$_{49}$ through independent high-precision mass measurements with the JYFLTRAP double Penning trap and with the ISOLTRAP Multi-Reflection Time-of-Flight Mass Spectrometer. [...]
arXiv:2310.16915.-
2023-11-30 - 10 p.
- Published in : Phys. Rev. Lett.
- Published in : Phys. Rev. Lett.
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5.
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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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6.
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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
Fulltext: PDF;
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7.
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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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8.
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Mass measurements towards doubly magic $^{78}$Ni: Hydrodynamics versus nuclear mass contribution in core-collapse supernovae
/ Giraud, S (GANIL ; Michigan State U., NSCL) ; Canete, L (Jyvaskyla U. ; Surrey U.) ; Bastin, B (GANIL) ; Kankainen, A (Jyvaskyla U.) ; Fantina, A F (GANIL) ; Gulminelli, F (LPC, Caen) ; Ascher, P (CENBG, Gradignan) ; Eronen, T (Jyvaskyla U.) ; Girard-Alcindor, V (GANIL ; IJCLab, Orsay ; Darmstadt, Tech. U.) ; Jokinen, A (Jyvaskyla U.) et al.
We report the first high-precision mass measurements of the neutron-rich nuclei $^{74,75}$Ni and the clearly identified ground state of $^{76}$Cu, along with a more precise mass-excess value of $^{78}$Cu, performed with the double Penning trap JYFLTRAP at the Ion Guide Isotope Separator On-Line (IGISOL) facility. These new results lead to a quantitative estimation of the quenching for the $N=50$ neutron shell gap. [...]
2022 - 6 p.
- Published in : Phys. Lett. B 833 (2022) 137309
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9.
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Impact of Nuclear Deformation and Pairing on the Charge Radii of Palladium Isotopes
/ Geldhof, S (Jyvaskyla U. ; Leuven U.) ; Kortelainen, M (Jyvaskyla U.) ; Beliuskina, O (Jyvaskyla U.) ; Campbell, P (Manchester U.) ; Caceres, L (GANIL) ; Cañete, L (Jyvaskyla U.) ; Cheal, B (Liverpool U.) ; Chrysalidis, K (CERN) ; Devlin, C S (Liverpool U.) ; de Groote, R P (Jyvaskyla U.) et al.
The impact of nuclear deformation can been seen in the systematics of nuclear charge radii, with radii generally expanding with increasing deformation. In this Letter, we present a detailed analysis of the precise relationship between nuclear quadrupole deformation and the nuclear size. [...]
2022 - 6 p.
- Published in : Phys. Rev. Lett. 128 (2022) 152501
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10.
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$\beta$ and $\gamma$-spectroscopy study of $^{119}$Pd and $^{119}$Ag
/ Kurpeta, J (Warsaw U.) ; Abramuk, A (Warsaw U.) ; Rząca-Urban, T (Warsaw U.) ; Urban, W (Warsaw U.) ; Canete, L (Surrey U.) ; Eronen, T (Jyvaskyla U.) ; Geldhof, S (Leuven U.) ; Gierlik, M (NCBJ, Swierk) ; Greene, J P (Argonne (main)) ; Jokinen, A (Jyvaskyla U.) et al.
Neutron-rich $^{119}$Pd nuclei were produced in fission of natural uranium, induced by 25-MeV protons. Fission fragments swiftly extracted with the Ion Guide Isotope Separation On-Line method were mass separated using a dipole magnet and a Penning trap, providing mono-isotopic samples of $^{119}$Pd. [...]
2022 - 18 p.
- Published in : Phys. Rev. C 105 (2022) 034316
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