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1.
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Charge radii, moments, and masses of mercury isotopes across the $N=126$ shell closure
/ Goodacre, T. Day (Manchester U. ; TRIUMF ; CERN) ; Afanasjev, A.V. (Mississippi State U.) ; Barzakh, A.E. (St. Petersburg, INP) ; Nies, L. (CERN ; Greifswald U.) ; Marsh, B.A. (CERN) ; Sels, S. (CERN ; Leuven U.) ; Perera, U.C. (Mississippi State U.) ; Ring, P. (Munich, Tech. U.) ; Wienholtz, F. (CERN ; Greifswald U.) ; Andreyev, A.N. (York U., England ; JAERI, Tokai) et al.
Combining laser spectroscopy in a Versatile Arc Discharge and Laser Ion Source, with Penning-trap mass spectrometry at the CERN-ISOLDE facility, this work reports on mean-square charge radii of neutron-rich mercury isotopes across the $N = 126$ shell closure, the electromagnetic moments of $^{207}$Hg and more precise mass values of $^{206-208}$Hg. The odd-even staggering (OES) of the mean square charge radii and the kink at $N = 126$ are analyzed within the framework of covariant density functional theory (CDFT), with comparisons between different functionals to investigate the dependence of the results on the underlying single-particle structure. [...]
arXiv:2111.10468.-
2021-11-30 - 20 p.
- Published in : Phys. Rev. C 104 (2021) 054322
Fulltext: PDF;
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2.
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Laser spectroscopy of neutron-rich $^{207,208}$Hg isotopes: Illuminating the kink and odd-even staggering in charge radii across the $N=126$ shell closure
/ Day Goodacre, T. (Manchester U. ; CERN ; TRIUMF) ; Afanasjev, A.V. (Mississippi State U.) ; Barzakh, A.E. (St. Petersburg, INP) ; Marsh, B.A. (CERN) ; Sels, S. (CERN ; Leuven U.) ; Ring, P. (Munich, Tech. U.) ; Nakada, H. (Chiba U.) ; Andreyev, A.N. (York U., England ; JAERI, Tokai) ; Van Duppen, P. (Leuven U.) ; Althubiti, N.A. (Manchester U. ; Al Jouf U.) et al.
The mean-square charge radii of $^{207,208}$Hg ($Z=80, N=127,128$) have been studied for the first time and those of $^{202,203,206}$Hg ($N=122,123,126$) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic \textit{kink} in the charge radii at the $N=126$ neutron shell closure has been revealed, providing the first information on its behavior below the $Z=82$ proton shell closure. [...]
arXiv:2012.13802.-
2021-01-23 - 7 p.
- Published in : Phys. Rev. Lett. 126 (2021) 032502
Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;
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3.
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α -decay branching ratio of $^{180}\mathrm{ Pt}$
/ Cubiss, J G (York U., England) ; Harding, R D (CERN ; York U., England) ; Andreyev, A N ; Althubiti, N ; Andel, B ; Antalic, S (Comenius U.) ; Barzakh, A E (Kurchatov Inst., Moscow) ; Cocolios, T E (Leuven U. ; Manchester U.) ; Day Goodacre, T (Manchester U. ; CERN) ; Farooq-Smith, G J (Manchester U. ; Leuven U.) et al.
/CMS
A study of the $^{180}\mathrm{Hg}$ decay chain performed at the CERN-ISOLDE facility has allowed the ground-state–to–ground-state α decay of $^{180}\mathrm{Pt}$ to be investigated. A more precise α-decay branching ratio of $b_{\alpha}$ $(^{180}\mathrm{Pt})=0.52(5)$% has been deduced. [...]
2020 - 4 p.
- Published in : Phys. Rev. C 101 (2020) 014314
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4.
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Shape staggering of mid-shell mercury isotopes from in-source laser spectroscopy compared with Density Functional Theory and Monte Carlo Shell Model calculations
/ Sels, S. (KU Leuven, Dept. Phys. Astron.) ; Day Goodacre, T. (Manchester U. ; CERN) ; Marsh, B.A. (CERN) ; Pastore, A. (York U., England) ; Ryssens, W. (Lyon, IPN) ; Tsunoda, Y. (Tokyo U.) ; Althubiti, N. (Manchester U.) ; Andel, B. (Comenius U.) ; Andreyev, A.N. (York U., England ; JAEA, Ibaraki) ; Atanasov, D. (Heidelberg, Max Planck Inst.) et al.
Neutron-deficient $^{177-185}$Hg isotopes were studied using in-source laser resonance-ionization spectroscopy at the CERN-ISOLDE radioactive ion-beam facility, in an experiment combining different detection methods tailored to the studied isotopes. These include either alpha-decay tagging or Multi-reflection Time-of-Flight gating to identify the isotopes of interest. [...]
arXiv:1902.11211.-
2019-04-13 - 17 p.
- Published in : Phys. Rev. C 99 (2019) 044306
Fulltext: PDF;
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5.
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Characterization of the shape-staggering effect in mercury nuclei
/ Marsh, B A (CERN) ; Day Goodacre, T (CERN ; Manchester U.) ; Sels, S (Leuven U.) ; Tsunoda, Y (Tokyo U., CNS) ; Andel, B (Comenius U.) ; Andreyev, A N (York U., England ; JAEA, Ibaraki) ; Althubiti, N A (Manchester U.) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Barzakh, A E (St. Petersburg, INP) ; Billowes, J (Manchester U.) et al.
In rare cases, the removal of a single proton (Z) or neutron (N) from an atomic nucleus leads to a dramatic shape change. These instances are crucial for understanding the components of the nuclear interactions that drive deformation. [...]
2018 - 6 p.
- Published in : Nature Phys. 14 (2018) 1163-1167
Fulltext: PDF; External link: INTERACTIONS
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6.
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Change in structure between the $I = 1/2$ states in $^{181}$Tl and $^{177,179}$Au
/ Cubiss, J G (York U., England ; CERN) ; Barzakh, A E (Kurchatov Inst., Moscow) ; Andreyev, A N (York U., England ; JAERI, Tokai ; CERN) ; Al Monthery, M (York U., England) ; Althubiti, N (Manchester U.) ; Andel, B (Comenius U.) ; Antalic, S (Comenius U.) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Cocolios, T E (Leuven U. ; Manchester U. ; CERN) et al.
The first accurate measurements of the $\alpha$-decay branching ratio and half-life of the $I^{\pi}=1/2^+$ ground state in $^{181}$Tl have been made, along with the first determination of the magnetic moments and $I=1/2$ spin assignments of the ground states in $^{177,179}$Au. The results are discussed within the complementary systematics of the reduced $\alpha$-decay widths and nuclear $g$ factors of low-lying, $I^{\pi}=1/2^+$ states in the neutron-deficient lead region. [...]
2018 - 9 p.
- Published in : Phys. Lett. B 786 (2018) 355-363
Article from SCOAP3: PDF;
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7.
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The electron capture in $^{163}$Ho experiment – ECHo
/ Gastaldo, L (Kirchhoff Inst. Phys.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Chrysalidis, K (Mainz U., Inst. Phys.) ; Day Goodacre, T (CERN) ; Domula, A (Dresden, Tech. U.) ; Door, M (Heidelberg, Max Planck Inst.) ; Dorrer, H (Mainz U., Inst. Kernphys. ; PSI, Villigen ; Bern U.) ; Düllmann, Ch E (Mainz U., Inst. Kernphys. ; Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Eberhardt, K (Mainz U., Inst. Kernphys. ; Helmholtz Inst., Mainz) ; Eliseev, S (Heidelberg, Max Planck Inst.) et al.
Neutrinos, and in particular their tiny but non-vanishing masses, can be considered one of the doors towards physics beyond the Standard Model. Precision measurements of the kinematics of weak interactions, in particular of the$^{3}$H β-decay and the$^{163}$Ho electron capture (EC), represent the only model independent approach to determine the absolute scale of neutrino masses. [...]
2017 - 72 p.
- Published in : Eur. Phys. J. Spec. Top. 226 (2017) 1623-1694
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8.
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Recent Results for the ECHo Experiment
/ Hassel, C (Kirchhoff Inst. Phys.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Goodacre, T Day (CERN) ; Dorrer, H (Mainz U., Inst. Kernphys.) ; Düllmann, Ch E (Mainz U., Inst. Kernphys.) ; Eberhardt, K (Mainz U., Inst. Kernphys.) ; Eliseev, S (Heidelberg, Max Planck Inst.) ; Enss, C (Kirchhoff Inst. Phys.) ; Filianin, P (Heidelberg, Max Planck Inst.) ; Fäßler, A (Tubingen U.) et al.
The Electron Capture in$^{163}$ Ho experiment, ECHo, is designed to investigate the electron neutrino mass in the sub-eV range by means of the analysis of the calorimetrically measured spectrum following the electron capture (EC) in$^{163}$ Ho. Arrays of low-temperature metallic magnetic calorimeters (MMCs), read-out by microwave SQUID multiplexing, will be used in this experiment. [...]
2016 - 12 p.
- Published in : J. Low Temp. Phys. 184 (2016) 910-921
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9.
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Laser ion beam production at CERN-ISOLDE: New features – More possibilities
/ Rothe, S (CERN) ; Day Goodacre, T (CERN ; Manchester U.) ; Fedorov, D V (St. Petersburg, INP) ; Fedosseev, V N (CERN) ; Marsh, B A (CERN) ; Molkanov, P L (St. Petersburg, INP) ; Rossel, R E (CERN ; Mainz U., Inst. Phys. ; Fachhochschule Wiesbaden) ; Seliverstov, M D (St. Petersburg, INP) ; Veinhard, M (CERN) ; Wendt, K D A (Mainz U., Inst. Phys.)
This article summarizes the current specifications and the latest features of the CERN-ISOLDE resonance ionization laser ion source (RILIS). This includes a description of the optical layout and the newly designed reference system. [...]
2016 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 376 (2016) 91-96
Elsevier Open Access article: PDF;
In : 17th International Conference on Electromagnetic Isotope Separators and Related Topics, Grand Rapids, USA, 11 - 15 May 2015, pp.91-96
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10.
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Laser resonance ionization scheme development for tellurium and germanium at the dual Ti:Sa–Dye ISOLDE RILIS
/ Day Goodacre, T. (CERN ; Manchester U.) ; Fedorov, D. (St. Petersburg, INP) ; Fedosseev, V.N. (CERN) ; Forster, L. (CERN) ; Marsh, B.A. (CERN) ; Rossel, R.E. (CERN ; Mainz U., Inst. Phys. ; Hochschule RheinMain, Wiesbaden) ; Rothe, S. (CERN) ; Veinhard, M. (CERN)
The resonance ionization laser ion source (RILIS) is the principal ion source of the ISOLDE radioactive beam facility based at CERN. Using the method of in-source laser resonance ionization spectroscopy, a transition to a new autoionizing state of tellurium was discovered and applied as part of a three-step, three-resonance, photo-ionization scheme. [...]
2016
- Published in : Nucl. Instrum. Methods Phys. Res., A 830 (2016) 510-514
Elsevier Open Access article: PDF;
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