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First observation of high-K isomeric states in $^{249}$Md and $^{251}$Md
/ Goigoux, T. (IRFU, Saclay) ; Theisen, Ch. (IRFU, Saclay) ; Sulignano, B. (IRFU, Saclay) ; Airiau, M. (IRFU, Saclay) ; Auranen, K. (Jyvaskyla U.) ; Badran, H. (Jyvaskyla U. ; STUK, Helsinki) ; Briselet, R. (IRFU, Saclay) ; Calverley, T. (Jyvaskyla U. ; Liverpool U.) ; Cox, D. (Jyvaskyla U. ; Liverpool U. ; Lund U.) ; Déchery, F. (IRFU, Saclay) et al.
Decay spectroscopy of the odd-proton nuclei $^{249}$Md and $^{251}$Md has been performed. High-$K$ isomeric states were identified for the first time in these two nuclei through the measurement of their electromagnetic decay. [...]
arXiv:2107.00517.-
2021-12-01 - 14 p.
- Published in : Eur. Phys. J. A 57 (2021) 321
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2.
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In-beam γ -ray and electron spectroscopy of $^{249,251}$Md
/ Briselet, R. (IRFU, Saclay) ; Theisen, Ch. (IRFU, Saclay) ; Sulignano, B. (IRFU, Saclay) ; Airiau, M. (IRFU, Saclay) ; Auranen, K. (Jyvaskyla U.) ; Cox, D.M. (Jyvaskyla U. ; Liverpool U.) ; Déchery, F. (IRFU, Saclay ; Strasbourg, IPHC) ; Drouart, A. (IRFU, Saclay) ; Favier, Z. (IRFU, Saclay) ; Gall, B. (Strasbourg, IPHC) et al.
The odd-$Z$ $^{251}$Md nucleus was studied using combined $\gamma$-ray and conversion-electron in-beam spectroscopy. Besides the previously observed rotational band based on the $[521]1/2^-$ configuration, another rotational structure has been identified using $\gamma$-$\gamma$ coincidences. [...]
arXiv:2001.10235.-
2020-07-09 - 16 p.
- Published in : Phys. Rev. C 102 (2020) 014307
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3.
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The SPEDE spectrometer
/ Papadakis, P. (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; Cox, D.M. (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; O'Neill, G.G. (Liverpool U. ; Western Cape U.) ; Borge, M.J.G. (CERN) ; Butler, P.A. (Liverpool U.) ; Gaffney, L.P. (CERN) ; Greenlees, P.T. (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; Herzberg, R.D. (Liverpool U.) ; Illana, A. (Leuven U.) ; Joss, D.T. (Liverpool U.) et al.
The electron spectrometer, SPEDE, has been developed and will be employed in conjunction with the Miniball spectrometer at the HIE-ISOLDE facility, CERN. SPEDE allows for direct measurement of internal conversion electrons emitted in-flight, without employing magnetic fields to transport or momentum filter the electrons. [...]
arXiv:1709.07449.-
2018-03-12 - 8 p.
- Published in : Eur. Phys. J. A 54 (2018) 42
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4.
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Multiple chiral bands in $^{137}$Nd
/ Petrache, C.M. (CSNSM, Orsay) ; Lv, B.F. (Lanzhou, Inst. Modern Phys.) ; Chen, Q.B. (Munich, Tech. U.) ; Meng, J. (Peking U., SKLNPT ; Kyoto U., Yukawa Inst., Kyoto) ; Astier, A. (CSNSM, Orsay) ; Dupont, E. (CSNSM, Orsay) ; Zheng, K.K. (CSNSM, Orsay) ; Greenlees, P.T. (Jyvaskyla U.) ; Badran, H. (Jyvaskyla U.) ; Calverley, T. (Jyvaskyla U. ; Liverpool U.) et al.
Two new bands have been identified in $^{137}$Nd from a high-statistics JUROGAM II gamma-ray spectroscopy experiment. Constrained density functional theory and particle rotor model calculations are used to assign configurations and investigate the band properties, which are well described and understood. [...]
arXiv:2008.07925.-
2020-08-18 - 10 p.
- Published in : Eur. Phys. J. A 56 (2020) 208
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5.
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Evidence against the wobbling nature of low-spin bands in $^{135}$Pr
/ Lv, B.F. (Lanzhou, Inst. Modern Phys. ; Beijing, GUCAS) ; Petrache, C.M. (IJCLab, Orsay) ; Lawrie, E.A. (iThemba LABS ; Western Cape U.) ; Guo, S. (Lanzhou, Inst. Modern Phys. ; Beijing, GUCAS) ; Astier, A. (IJCLab, Orsay) ; Dupont, E. (IJCLab, Orsay) ; Zheng, K.K. (Lanzhou, Inst. Modern Phys. ; Beijing, GUCAS ; IJCLab, Orsay) ; Ong, H.J. (Lanzhou, Inst. Modern Phys. ; Beijing, GUCAS) ; Wang, J.G. (Lanzhou, Inst. Modern Phys. ; Beijing, GUCAS) ; Zhou, X.H. (Lanzhou, Inst. Modern Phys. ; Beijing, GUCAS) et al.
The electromagnetic character of the $\Delta I=1$ transitions connecting the one- to zero-phonon and the two- to one-phonon wobbling bands should be dominated by an $E2$ component, due to the collective motion of the entire nuclear charge. In the present work it is shown, based on combined angular correlation and linear polarization measurements, that the mixing ratios of all analyzed connecting transitions between low-lying bands in $^{135}$Pr interpreted as zero-, one-, and two-phonon wobbling bands, have absolute values smaller than one. [...]
arXiv:2106.04879.-
2022-01-10 - 6 p.
- Published in : Phys. Lett. B 824 (2022) 136840
Fulltext: 1-s2.0-S0370269321007802-main - PDF; 2106.04879 - PDF;
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7.
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Collectivity in the light radon nuclei measured directly via Coulomb excitation
/ Gaffney, L.P. (Leuven U. ; Liverpool U.) ; Robinson, A.P. (York U., England ; Manchester U.) ; Jenkins, D.G. (York U., England) ; Andreyev, A.N. (Leuven U. ; York U., England ; JAEA, Ibaraki) ; Bender, M. (CENBG, Gradignan) ; Blazhev, A. (Cologne U.) ; Bree, N. (Leuven U.) ; Bruyneel, B. (Cologne U.) ; Butler, P.A. (Liverpool U.) ; Cocolios, T.E. (CERN ; Manchester U.) et al.
Background: Shape coexistence in heavy nuclei poses a strong challenge to state-of-the-art nuclear models, where several competing shape minima are found close to the ground state. A classic region for investigating this phenomenon is in the region around $Z=82$ and the neutron mid-shell at $N=104$. [...]
arXiv:1503.03245.-
2015-06-22 - 11 p.
- Published in : Phys. Rev. C 91 (2015) 064313
External link: Preprint
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8.
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The observation of vibrating pear-shapes in radon nuclei
/ Butler, P.A. (Liverpool U.) ; Gaffney, L.P. (Liverpool U. ; CERN) ; Spagnoletti, P. (West Scotland U.) ; Konki, J. (CERN) ; Scheck, M. (West Scotland U.) ; Smith, J.F. (West Scotland U.) ; Abrahams, K. (Western Cape U.) ; Bowry, M. (TRIUMF) ; Cederkäll, J. (Lund U.) ; Chupp, T. (Michigan U.) et al.
There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the standard model of particle physics. [...]
arXiv:2003.10147.-
2019-06-06 - 6 p.
- Published in : Nature Commun. 10 (2019) 2473
Fulltext: 2003.10147 - PDF; 7a6aa522dd658653207485bc1ee38876 - PDF; s41467-019-10494-5 - PDF;
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9.
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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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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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