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2019-08-24
06:00
$^{57}$Fe Mössbauer study of epitaxial TiN thin film grown on MgO (1 0 0) by magnetron sputtering / Qi, B (Iceland U.) ; Gunnlaugsson, H P (Iceland U.) ; Mokhles Gerami, A (K.N. Toosi U.) ; Gislason, H P (Iceland U.) ; Ólafsson, S (Iceland U.) ; Magnus, F (Iceland U.) ; Mølholt, T E (CERN) ; Masenda, H (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Tarazaga Martín-Lueugo, A (Linz U.) ; Bonanni, A (Linz U.) et al. /ISOLDE
The properties and performance of TiN thin films are closely related to the concentration and mobility of lattice defects in the thin film structures of TiN. This makes a local atomic scale study of TiN thin films an ever-growing demand. [...]
2018 - 10 p. - Published in : Appl. Surf. Sci. 464 (2019) 682-691

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2019-08-24
06:00
Elliptic Problems with Nonlocal Potential Arising in Models of Nonlinear Optics / Muravnik, A B (Voronezh State U. ; Moscow State U.)
The Dirichlet problem in the half-plane for strong elliptic differential-difference equations with nonlocal potentials is considered. The classical solvability of this problem is proved, and the integral representation of this classical solution by a Poisson-type relation is constructed..
2019 - 13 p. - Published in : Math. Notes 105 (2019) 734-746

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2019-08-24
06:00
Magnetic field at Ce impurities in La sites of La$_{0.5}$Ba$_{0.5}$MnO$_{3}$ double perovskites / Bosch-Santos, B (Sao Paulo U.) ; Nascimento, N M (Sao Paulo U.) ; Saiki, M (Sao Paulo U.) ; Correa, E L (Sao Paulo U.) ; Sales, T S N (Sao Paulo U.) ; Pereira, L F D (Sao Paulo U.) ; Cabrera-Pasca, G A (Para U.) ; Saxena, R N (Sao Paulo U.) ; Schell, J (Duisburg-Essen U. ; CERN) ; Carbonari, A W (Sao Paulo U.)
Due to its rich variety of electromagnetic properties, such as a colossal magnetoresistance, charge and orbital ordering, and metal-insulator transition, the magnetic behavior in La$_{0.5}$Ba$_{0.5}$MnO$_{3}$ double perovskite compounds has been investigated by several techniques, however more experimental data, especially from atomic resolution techniques, are still necessary to understand such complex behavior. In this paper, we have used a nuclear and short-range technique, the Perturbed Angular Correlation (PAC) spectroscopy, to investigate the magnetic hyperfine interaction at the $^{140}$Ce and $^{111}$Cd probe nuclei as impurities occupying La sites. [...]
2019 - Published in : AIP Adv. 9 (2019) 035245

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2019-08-23
06:34
Chemical Purification of Terbium-155 from Pseudo-Isobaric Impurities in a Mass Separated Source Produced at CERN / Webster, Ben (Teddington, Natl. Phys. Lab ; Surrey U.) ; Ivanov, Peter (Teddington, Natl. Phys. Lab) ; Russell, Ben (Teddington, Natl. Phys. Lab) ; Collins, Sean (Teddington, Natl. Phys. Lab) ; Stora, Thierry (CERN) ; Ramos, Joao Pedro (CERN ; Leuven U.) ; Köster, Ulli (Laue-Langevin Inst.) ; Robinson, Andrew Paul (Teddington, Natl. Phys. Lab ; Manchester U.) ; Read, David (Teddington, Natl. Phys. Lab ; Surrey U.)
Four terbium radioisotopes ($^{149, 152, 155, 161}$Tb) constitute a potential theranostic quartet for cancer treatment but require any derived radiopharmaceutical to be essentially free of impurities. Terbium-155 prepared by proton irradiation and on-line mass separation at the CERN-ISOLDE and CERN-MEDICIS facilities contains radioactive$^{139}$Ce$^{16}$O and also zinc or gold, depending on the catcher foil used. [...]
2019 - Published in : Sci. Rep. 9 (2019) 10884 fulltext from publisher: PDF;

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2019-08-23
06:34
Capture of an external anion beam into a linear Paul trap / Cerchiari, G (CERN) ; Erlewein, S (CERN) ; Yzombard, P (Heidelberg U.) ; Zimmermann, M (Heidelberg U.) ; Kellerbauer, A (Heidelberg, Max Planck Inst.)
We describe a linear Paul trap and high-voltage platform specifically designed for the trapping of a large and pure sample of anions from an external keV-energy beam. Capture and confinement in a static configuration of DC potentials was found to occur by transfer of axial to radial ion momentum due to elastic and inelastic collisions. [...]
2019 - Published in : J. Phys. B 52 (2019) 155003 Fulltext: PDF;

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2019-08-23
06:34
Rapid growth of organic aerosol nanoparticles over a wide tropospheric temperature range / Stolzenburg, Dominik (Vienna U.) ; Fischer, Lukas (Innsbruck U.) ; Vogel, Alexander L (Frankfurt U. ; CERN ; PSI, Villigen) ; Heinritzi, Martin (Frankfurt U.) ; Schervish, Meredith (Carnegie Mellon U.) ; Simon, Mario (Frankfurt U.) ; Wagner, Andrea C (Frankfurt U.) ; Dada, Lubna (Helsinki U.) ; Ahonen, Lauri R (Helsinki U.) ; Amorim, Antonio (Lisbon U. ; CMAF, Lisbon) et al.
Nucleation and growth of aerosol particles from atmospheric vapors constitutes a major source of global cloud condensation nuclei (CCN). The fraction of newly formed particles that reaches CCN sizes is highly sensitive to particle growth rates, especially for particle sizes <10 nm, where coagulation losses to larger aerosol particles are greatest. [...]
2018 - 6 p. - Published in : Proc. Natl. Acad. Sci. U. S. A. 115 (2018) 9122-9127

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2019-08-22
06:55
Stability modeling of the LHC Nb-Ti Rutherford cables subjected to beam losses / Bottura, L (CERN) ; Breschi, M (Bologna U.) ; Felcini, E (CERN) ; Lechner, A (CERN)
The Large Hadron Collider (LHC) at CERN is being prepared for its full energy exploitation during run III, i.e., an increase of the beam energy beyond the present 6.5 TeV, targeting the maximum discovery potential attainable. This requires an increase of the operating field of the superconducting dipole and quadrupole magnets, which in turn will result in more demanding working conditions due to a reduction of the operating margin while the energy deposited by particle loss will increase. [...]
2019 - 10 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 041002 Fulltext from Publisher: PDF;

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2019-08-22
06:55
Noninvasive LHC transverse beam size measurement using inelastic beam-gas interactions / Alexopoulos, A (CERN) ; Barschel, C (CERN) ; Bravin, E (CERN) ; Bregliozzi, G (CERN) ; Chritin, N (CERN) ; Dehning, B (CERN) ; Ferro-Luzzi, M (CERN) ; Giovannozzi, M (CERN) ; Jacobsson, R (CERN) ; Jensen, L (CERN) et al. /BGV
The beam-gas vertex (BGV) detector is an innovative instrument measuring noninvasively the transverse beam size in the Large Hadron Collider (LHC) using reconstructed tracks from beam-gas interactions. The BGV detector was installed in 2016 as part of the R&D; for the High-Luminosity LHC project. [...]
2019 - 15 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 042801 Fulltext from Publisher: PDF;

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2019-08-22
06:55
Development of the SLRI beam test facility for characterization of monolithic active pixel sensors / Kittimanapun, K (Unlisted, TH) ; Chanlek, N (unlisted, TH) ; Klysubun, P (unlisted, TH) ; Kobdaj, C (Suranaree U. of Tech.) ; Lakrathok, A (Suranaree U. of Tech.) ; Laojamnongwong, N (Suranaree U. of Tech.) ; Mager, M (CERN) ; Musa, L (CERN)
Synchrotron Light Research Institute (SLRI) has successfully constructed a new experimental station, a Beam Test Facility (BTF), to the current SLRI accelerator complex. SLRI-BTF is capable of producing electron test beams with the number of electrons ranging from a few to millions of electrons per spill and with tunable energy from 40 MeV up to 1.2 GeV. [...]
2019 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 930 (2019) 105-111

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2019-08-22
05:13
Alternative approach to populate and study the $^{229}$Th nuclear clock isomer / Verlinde, M. (Leuven U.) ; Kraemer, S. (Leuven U.) ; Moens, J. (Leuven U.) ; Chrysalidis, K. (CERN) ; Correia, J.G. (Lisbon, IST) ; Cottenier, S. (U. Gent (main) ; Unlisted, BE) ; De Witte, H. (Leuven U.) ; Fedorov, D.V. (Kurchatov Inst., Moscow) ; Fedosseev, V.N. (CERN) ; Ferrer, R. (Leuven U.) et al.
A new approach to observe the radiative decay of the $^{229}$Th nuclear isomer, and to determine its energy and radiative lifetime, is presented. Situated at a uniquely low excitation energy, this nuclear state might be a key ingredient for the development of a nuclear clock, a nuclear laser and the search for time variations of the fundamental constants. [...]
arXiv:1904.10245.- 2019-08-12 - 10 p. - Published in : Phys. Rev. C 100 (2019) 024315 Fulltext: PDF;

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