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Target Development towards First Production of High-Molar- Activity $^{44g}$Sc and $^{47}$Sc by Mass Separation at CERN-MEDICIS
/ Mamis, Edgars (CERN ; Latvia U.) ; Duchemin, Charlotte (CERN) ; Berlin, Valentina (CERN) ; Bernerd, Cyril (CERN) ; Bovigny, Mathieu (CERN) ; Chevallay, Eric (CERN) ; Crepieux, Bernard (CERN) ; Gadelshin, Vadim Maratovich (Mainz U., Inst. Phys.) ; Heinke, Reinhard (CERN) ; Hernandez, Ronaldo Mendez (CERN ; Havana, ISCTN) et al.
The radionuclides 43Sc, 44g/mSc, and 47Sc can be produced cost-effectively in sufficient yield for medical research and applications by irradiating natTi and natV target materials with protons. Maximizing the production yield of the therapeutic 47Sc in the highest cross section energy range of 24–70 MeV results in the co-production of long-lived, high-γ-ray-energy 46Sc and 48Sc contaminants if one does not use enriched target materials. [...]
2024 - 28 p.
- Published in : Pharmaceuticals 17 (2024) 390
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Hot electron enhanced photoemission from laser fabricated plasmonic photocathodes
/ Martinez-Calderon, Miguel (CERN) ; Groussin, Baptiste (CERN) ; Bjelland, Victoria (CERN ; Norwegian U. Sci. Tech.) ; Chevallay, Eric (CERN) ; Fedosseev, Valentin N (CERN) ; Himmerlich, Marcel (CERN) ; Lorenz, Pierre ; Manjavacas, Alejandro ; Marsh, Bruce A (CERN) ; Neupert, Holger (CERN) et al.
Photocathodes are key elements in high-brightness electron sources and ubiquitous in the operation of large-scale accelerators, although their operation is often limited by their quantum efficiency and lifetime. Here, we propose to overcome these limitations by utilizing direct-laser nanostructuring techniques on copper substrates, improving their efficiency and robustness for next-generation electron photoinjectors. [...]
2023 - 9 p.
- Published in : 10.1515/nanoph-2023-0552
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Fabrication and rejuvenation of high quantum efficiency caesium telluride photocathodes for high brightness and high average current photoinjectors
/ Martinez-Calderon, M (CERN) ; Chevallay, E (CERN) ; Rossel, R E (CERN) ; Jones, L B (Daresbury) ; Zevi Della Porta, G (CERN) ; Marsh, B (CERN) ; Granados, E (CERN)
With their high quantum efficiency (QE) and excellent photoemissive properties, cesium telluride (Cs-Te) photocathodes are the current workhorse in the high average current electron accelerators around the globe. Their ability to generate high brightness and high charge electron beams has opened the doorway to numerous applications, including fundamental particle physics research, radiation therapy, high-energy physics experiments, and high repetition rate free-electron lasers (FELs). [...]
2024 - 10 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 023401
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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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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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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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Large Shape Staggering in Neutron-Deficient Bi Isotopes
/ Barzakh, A (St. Petersburg, INP) ; Andreyev, A N (JAEA, Ibaraki ; York U., England) ; Raison, C (York U., England) ; Cubiss, J G (York U., England) ; Van Duppen, P (Leuven U.) ; Péru, S (CEA DAM) ; Hilaire, S (CEA DAM) ; Goriely, S (Brussels U., IAA) ; Andel, B (Comenius U.) ; Antalic, S (Comenius U.) et al.
The changes in the mean-square charge radius (relative to $^{209}$Bi), magnetic dipole, and electric quadrupole moments of $^{187,188,189,191}$Bi were measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). A large staggering in radii was found in $^{187,188,189}$Big, manifested by a sharp radius increase for the ground state of $^{188}$Bi relative to the neighboring $^{187,189}$Big. [...]
2021 - 7 p.
- Published in : Phys. Rev. Lett. 127 (2021) 192501
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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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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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