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Deformation versus Sphericity in the Ground States of the Lightest Gold Isotopes
/ Cubiss, J G (York U., England) ; Andreyev, A N (York U., England ; JAEA, Ibaraki) ; Barzakh, A E (Unlisted) ; Van Duppen, P (KU Leuven, Dept. Phys. Astron.) ; Hilaire, S (CEA DAM) ; Péru, S (CEA DAM) ; Goriely, S (Brussels U., IAA) ; Al Monthery, M (York U., England) ; Althubiti, N A (Manchester U. ; Al Jouf U. ; Ain Shames U.) ; Andel, B (Comenius U.) et al.
The changes in mean-squared charge radii of neutron-deficient gold nuclei have been determined using the in-source, resonance-ionization laser spectroscopy technique, at the ISOLDE facility (CERN). From these new data, nuclear deformations are inferred, revealing a competition between deformed and spherical configurations. [...]
2023 - 8 p.
- Published in : Phys. Rev. Lett. 131 (2023) 202501
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2.
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A Neural Network approach to reconstructing SuperKEKB beam parameters from beamstrahlung
/ Di Carlo, S. (CERN) ; Bonvicini, G. (Wayne State U.) ; Althubiti, N.A. (Al Jouf U.) ; Ayad, R. (U. Tabuk) ; De La Cruz-Burelo, E. (CINVESTAV, IPN) ; Domínguez, I. (Sinaloa U.) ; Bashir, B.O. El (U. Tabuk) ; Farhat, H. (Wayne State U.) ; Flanagan, J. (KEK, Tsukuba) ; Gillard, R. (Wayne State U.) et al.
This work shows how it is possible to reconstruct SuperKEKB's beam parameters using a Neural Network with beamstrahlung signal from the Large Angle Beamstrahlung Monitor (LABM) as input. We describe the device, the model, and discuss the results..
arXiv:2206.11709.-
2022-11-01 - 22 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1042 (2022) 167453
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3.
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Producing gold at ISOLDE-CERN
/ Barzakh, A E (St. Petersburg, INP) ; Andreyev, A N (York U., England ; JAERI, Tokai) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Cubiss, J G (York U., England) ; Harding, R D (York U., England ; CERN) ; Al Monthery, M (York U., England) ; Althubiti, N A (Manchester U. ; Al Jouf U.) ; Andel, B (Comenius U. ; Leuven U.) ; Antalic, S (Comenius U.) ; Ballof, J (CERN ; Mainz U., Inst. Kernchem.) et al.
The yield of 18 ion beams of radioactive gold nuclei produced in the thick uranium target at ISOLDE (CERN) by 1.4-GeV protons was measured. The production-efficiency dependence on the half-life (efficiency curve) was derived using the in-target production calculations by the FLUKA-CERN code. [...]
2022 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 513 (2022) 26-32
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4.
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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
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5.
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Laser-assisted nuclear decay spectroscopy of $^{176,177,179}$Au
/ Harding, R D (York U., England ; CERN) ; Andreyev, A N (York U., England ; JAERI, Tokai) ; Barzakh, A E (St. Petersburg, INP) ; Cubiss, J G (York U., England) ; Van Duppen, P (Leuven U.) ; Al Monthery, M (York U., England) ; Althubiti, N A (Manchester U.) ; Andel, B (Leuven U. ; Comenius U.) ; Antalic, S (Comenius U.) ; Cocolios, T E (Leuven U. ; Manchester U.) et al.
A study of the laser-ionized and mass-separated neutron-deficient isotopes $^{176,177,179}$Au was performed using the Resonance Ionization Laser Ion Source and the Windmill detection setup at ISOLDE, CERN. New and improved data on complex fine-structure α decays of the three isotopes were deduced, providing insight into the low-lying levels in the daughter nuclei $^{172,173,175}$Ir. [...]
2021 - 16 p.
- Published in : Phys. Rev. C 104 (2021) 024326
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6.
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Laser-assisted decay spectroscopy and mass spectrometry of $^{178}\mathrm{Au}$
/ Cubiss, J G ; Andreyev, A N ; Barzakh, A E ; Manea, V ; Al Monthery, M ; Althubiti, N A ; Andel, B ; Antalic, S ; Atanasov, D ; Blaum, K et al.
A comprehensive study of the isotope $^{178}$ Au has been made at the CERN-ISOLDE facility, using resonance laser ionization. Two long-lived states in $^{178}$ Au were identified—a low-spin ground state and a high-spin isomer—each of which were produced as pure beams. [...]
2020 - 12 p.
- Published in : Phys. Rev. C 102 (2020) 044332
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7.
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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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8.
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Laser-assisted decay spectroscopy for the ground states of $^{180,182}$Au
/ Harding, R D (CERN ; York U., England) ; Andreyev, A N (York U., England ; JAERI, Tokai) ; Barzakh, A E (St. Petersburg, INP) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Cubiss, J G (York U., England) ; Van Duppen, P (Leuven U.) ; Al Monthery, M (York U., England) ; Althubiti, N A (Manchester U.) ; Andel, B (Leuven U. ; Comenius U.) ; Antalic, S (Comenius U.) et al.
A study of the ground states of the laser-ionized and mass-separated odd-odd isotopes $^{180,182}$Au was performed using the Resonance Ionization Laser Ion Source, Windmill detection setup and ISOLTRAP Multi-Reflection Time-of-Flight Mass Spectrometer at ISOLDE, CERN. A complex fine-structure α-decay pattern of $^{180}$Au was deduced, providing insight into the low-lying levels in the daughter nucleus $^{176}Ir$. [...]
2020 - 16 p.
- Published in : Phys. Rev. C 102 (2020) 024312
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9.
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Shape coexistence in $^{187}$Au studied by laser spectroscopy
/ Barzakh, A E (St. Petersburg, INP) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Andreyev, A N (York U., England ; JAERI, Tokai) ; Monthery, M Al (York U., England) ; Althubiti, N A (Manchester U. ; Al Jouf U.) ; Andel, B (Leuven U. ; Comenius U.) ; Antalic, S (Comenius U.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Cocolios, T E ; Cubiss, J G et al.
Hyperfine-structure parameters and isotope shift of the 9/2$^−$ isomeric state in $^{187}$Au relative to $^{197}$Au for the 267.6-nm atomic transition have been measured for the first time using the in-source resonance-ionization spectroscopy technique. The magnetic dipole moment and change in the mean-square charge radius for this 9/2$^−$ isomer have been deduced. [...]
2020 - 7 p.
- Published in : Phys. Rev. C 101 (2020) 064321
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10.
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Hyperfine anomaly in gold and magnetic moments of ${I}^{\pi}=11/{2}^{-}$ gold isomers
/ Barzakh, A E (Kurchatov Inst., Moscow) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Andreyev, A N (York U., England ; JAERI, Tokai) ; Al Monthery, M (York U., England) ; Althubiti, N A (Manchester U. ; Al Jouf U.) ; Andel, B (Leuven U. ; Comenius U.) ; Antalic, S (Comenius U.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Cocolios, T E (Leuven U. ; Manchester U.) ; Cubiss, J G (York U., England) et al.
Hyperfine-structure constants for the 6s2S1/2 and 6p2P1/2 atomic states of the Iπ=11/2− gold isomers Aum177,191,193,195 have been measured at CERN-ISOLDE, using the in-source laser resonance-ionization spectroscopy technique. From the measured hyperfine constants the differences between hyperfine anomalies for these atomic states have been deduced. [...]
2020 - 9 p.
- Published in : Phys. Rev. C 101 (2020) 034308
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