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1.
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Isospin symmetry breaking in the T=1, A=70 triplet
/ Zimba, G L (Jyvaskyla U.) ; Ruotsalainen, P (Jyvaskyla U.) ; De Gregorio, G (Rome III U. ; INFN, Naples) ; de Angelis, G (INFN, Legnaro) ; Sarén, J (Jyvaskyla U.) ; Uusitalo, J (Jyvaskyla U.) ; Auranen, K (Jyvaskyla U.) ; Briscoe, A D (Jyvaskyla U.) ; Ge, Z (Jyvaskyla U.) ; Grahn, T (Jyvaskyla U.) et al.
Excited states in the Kr70 and Br70 nuclei were populated via the Ca40(S32,2n)Kr70 and Ca40(S32,pn)Br70 fusion-evaporation reactions at the Accelerator Laboratory of the University of Jyväskylä. The 2+⟶0+ and 4+⟶2+ transitions in Kr70 have been found to be 881(1) keV and (tentatively) 1037(2) keV, respectively. [...]
2024 - 13 p.
- Published in : Phys. Rev. C 110 (2024) 024314
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2.
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In-beam γ-ray spectroscopy of Ac211,213 and Ra211
/ Louko, J (Jyvaskyla U.) ; Auranen, K (Jyvaskyla U.) ; Uusitalo, J (Jyvaskyla U.) ; Briscoe, A D (Jyvaskyla U.) ; Grahn, T (Jyvaskyla U.) ; Greenlees, P T (Jyvaskyla U.) ; Illana, A (Jyvaskyla U.) ; Joukainen, H (Jyvaskyla U.) ; Julin, R (Jyvaskyla U.) ; Jutila, H (Jyvaskyla U.) et al.
The first in-beam γ-ray spectroscopic study of the neutron-deficient actinium isotopes Ac211,213 has been carried out at the Accelerator Laboratory of the University of Jyväskylä using a highly selective recoil-decay tagging method with the jurogam 3 germanium-detector array and MARA separator. The nuclei of interest were produced using the Lu175(Ar40,4n)Ac211 and Hf180(Cl37,4n)Ac213 fusion-evaporation reactions. [...]
2024 - 11 p.
- Published in : Phys. Rev. C 110 (2024) 034311
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3.
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Direct measurement of three different deformations near the ground state in an atomic nucleus
/ Montes Plaza, Adrian (Liverpool U. ; Jyvaskyla U.) ; Pakarinen, Janne (Jyvaskyla U.) ; Papadakis, Philippos (Daresbury) ; Herzberg, Rolf-Dietmar (Liverpool U.) ; Julin, Rauno (Jyvaskyla U.) ; Rodríguez, Tomás R (Madrid U.) ; Briscoe, Andrew D (Jyvaskyla U. ; Liverpool U.) ; Illana, Andrés (Jyvaskyla U. ; Madrid U.) ; Ojala, Joonas (Jyvaskyla U.) ; Ruotsalainen, Panu (Jyvaskyla U.) et al.
Atomic nuclei serve as prime laboratories for investigations of complex quantum phenomena, where minor nucleon rearrangements cause significant structural changes. $^{190}$Pb is the heaviest known neutron-deficient Pb isotope that can exhibit three distinct shapes: prolate, oblate, and spherical, with nearly degenerate excitation energies. [...]
2025 - 9 p.
- Published in : Commun. Phys. 8 (2025) 8
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4.
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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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5.
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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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6.
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7.
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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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8.
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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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10.
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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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