CERN Accelerating science


Ostatnio dodane:
Diffusion of $^6$Li in Tantalum and Tungsten Studied by the Neutron Depth Profiling Technique / Vacik, J (Rez, Nucl. Phys. Inst.) ; Köster, U (CERN) ; Hnatowicz, V (Rez, Nucl. Phys. Inst.) ; Cervena, J (Rez, Nucl. Phys. Inst.) ; Pasold, G (Jena U.)
Diffusion of $^6$Li in the refractory metals Ta and W has been studied using thenondestructive neutron depth profiling technique. The preliminary results point out the complex behavior of $^6$Li atoms in W and Ta. [...]
2005 - 6 p. - Published in : Defect Diff. Forum 237-240 (2005) 485-490

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Nuclear Level Density and $\gamma$-ray Strength Function of $^{67}\mathrm{Ni}$ and the impact on the i-process / ISOLDE Collaboration
Proton-$\gamma$ coincidences from $(\mathrm{d},\mathrm{p})$ reactions between a $^{66}\mathrm{Ni}$ beam and a deuterated polyethylene target have been analyzed with the inverse-Oslo method to find the nuclear level density (NLD) and $\gamma$-ray strength function ($\gamma$SF) of $^{67}\mathrm{Ni}$. [...]
- 16 p.

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Production study of Fr, Ra and Ac radioactive ion beams at ISOLDE, CERN / Jajčišinová, E (Geel, JRC ; Leuven U.) ; Dockx, K (Leuven U.) ; Au, M (CERN) ; Bara, S (Leuven U.) ; Cocolios, T E (Leuven U.) ; Chrysalidis, K (CERN) ; Farooq‑Smith, G J (Leuven U. ; Edinburgh U.) ; Fedorov, D V (Unlisted) ; Fedosseev, V N (CERN) ; Flanagan, K T (Manchester U.) et al.
The presented paper discusses the production of radioactive ion beams of francium, radium, and actinium from thick uranium carbide (UC$_{x}$) targets at ISOLDE, CERN. This study focuses on the release curves and extractable yields of francium, radium and actinium isotopes. [...]
2024 - 9 p. - Published in : Sci. Rep. 14 (2024) 11033 Fulltext: PDF;

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Structural formation yield of GeV centers from implanted Ge in diamond / Wahl, Ulrich (IST, Lisbon (main)) ; Correia, João Guilherme (IST, Lisbon (main)) ; Costa, Ângelo (Leuven U.) ; Lamelas, Afonso (Aveiro U.) ; Amaral, Vítor (Aveiro U.) ; Johnston, Karl (CERN) ; Magchiels, Goele (Leuven U.) ; Tunhuma, Shandirai Malven (Leuven U.) ; Vantomme, André (Leuven U.) ; Pereira, Lino M C (Leuven U.)
In order to study the structural formation yield of germanium-vacancy (GeV) centers from implanted Ge in diamond, we have investigated its lattice location by using the β$^{−}$ emission channeling technique from the radioactive isotope $^{75}$Ge (t$_{1/2}$ = 83 min) produced at the ISOLDE/CERN facility. $^{75}$Ge was introduced via recoil implantation following 30 keV ion implantation of the precursor isotope $^{75}$Ga (126 s) with fluences around 2 × 10$^{12}$–5 × 10$^{13}$ cm$^{−2}$. [...]
2024 - 16 p. - Published in : Mat. Quant. Tech. 4 (2024) 025101 Fulltext: PDF;

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Diffusion of Implanted 195Au Radiotracer Atoms in Amorphous Silicon under Irradiation with 1 Mev-N+ Ions / Voss, T (Stuttgart, Max Planck Inst.) ; Scharwaechter, P (Stuttgart, Max Planck Inst.) ; Frank, W (Stuttgart, Max Planck Inst. ; CERN) /ISOLDE Collaboration
The diffusion of implanted $^{195}$Au in Au-doped amorphous Si was studied, partly under N$^+$-irradiation by means of a radiotracer technique, in which the serial sectioning of the specimens was done by Ar$^+$-beam sputtering. It was found that high implantation doses in combination with great diffusion lengths give rise to complicated shapes of the diffusion profiles. [...]
2001 - 8 p. - Published in : Defect Diff. Forum 194-199 (2001) 659-666

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Terbium-149 production: a focus on yield and quality improvement towards preclinical application / Favaretto, C (Basel U. ; PSI, Villigen) ; Grundler, P V (PSI, Villigen) ; Talip, Z (PSI, Villigen) ; Köster, U (Laue-Langevin Inst. ; CERN) ; Johnston, K (CERN) ; Busslinger, S D (PSI, Villigen) ; Sprung, P (PSI, Villigen) ; Hillhouse, C C (PSI, Villigen) ; Eichler, R (PSI, Villigen ; Bern U.) ; Schibli, R (PSI, Villigen ; Zurich, ETH) et al.
Terbium-149 (T$_{1/2}$ = 4.1 h, E$_{α}$ = 3.98 MeV (16.7%), 28 µm range in tissue) is a radionuclide with potential for targeted alpha therapy. Due to the negligible emission of α-emitting daughter nuclides, toxicity to healthy tissue may be reduced in comparison with other α-particle emitters. [...]
2024 - 12 p. - Published in : Sci. Rep. 14 (2024) 3284 Fulltext: PDF;

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Precision spectroscopy and laser-cooling scheme of a radium-containing molecule / Udrescu, S M (MIT) ; Wilkins, S G (MIT) ; Breier, A A (Kassel U.) ; Athanasakis-Kaklamanakis, M (CERN ; Leuven U.) ; Ruiz, R F Garcia (MIT) ; Au, M (CERN ; Mainz U.) ; Belošević, I (TRIUMF) ; Berger, R (Philipps U. Marburg) ; Bissell, M L (Manchester U.) ; Binnersley, C L (Manchester U.) et al.
Molecules containing heavy radioactive nuclei are predicted to be extremely sensitive to violations of the fundamental symmetries of nature. The nuclear octupole deformation of certain radium isotopes massively boosts the sensitivity of radium monofluoride molecules to symmetry-violating nuclear properties. [...]
2024 - 14 p. - Published in : Nature Phys. 20 (2024) 202-207

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Half-life determination of $^{215}$At and $^{221}$Ra with high-purity radioactive ion beams / Bara, S (KU Leuven, Dept. Phys. Astron.) ; Jajčišinová, E (KU Leuven, Dept. Phys. Astron. ; Geel, JRC) ; Cocolios, T E (KU Leuven, Dept. Phys. Astron.) ; Andel, B (Comenius U.) ; Antalic, S (Comenius U.) ; Camaiani, A (Florence U. ; INFN, Florence ; KU Leuven, Dept. Phys. Astron.) ; Costache, C (Bucharest, IFIN-HH) ; Dockx, K (KU Leuven, Dept. Phys. Astron.) ; Farooq-Smith, G J (Edinburgh U. ; KU Leuven, Dept. Phys. Astron.) ; Kellerbauer, A (Geel, JRC) et al.
At CERN-ISOLDE, high-purity radioactive ion beams of $^{219}$Fr and $^{221}$RaF were investigated with $\alpha$-decay spectroscopy at the CRIS and ASET experiments in the course of three different experimental campaigns. The half-life of $^{215}$At, $\alpha$-decay daughter of $^{219}$Fr, is measured to be 36.3(3)[9]μs, and that of $^{221}$Ra was determined to be 26.2(1)[6]s, both of which are well in line with the trends in this region of the nuclear landscape but at odds with some of the reported literature..
2024 - 8 p. - Published in : Appl. Radiat. Isot. 208 (2024) 111289 Fulltext: Preprint - PDF; Supplementary material - PDF;

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Radiative lifetime of the A 2Π1/2 state in RaF with relevance to laser cooling / ISOLDE Collaboration
The radiative lifetime of the $A$$^2 \Pi_{1/2}$ (v=0) state in radium monofluoride (RaF) is measured to be 35(1) ns. [...]
- 8 p.

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Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO$_3$ Thin Films Studied by Emission Mössbauer Spectroscopy / Heiniger-Schell, Juliana (CERN ; Duisburg-Essen U.) ; Bharuth-Ram, Krish (ENS, Lyon, Lab. Phys. ; KwaZulu Natal U. ; DUT, Durban) ; Naicker, Kimara (ENS, Lyon, Lab. Phys. ; KwaZulu Natal U.) ; Masondo, Vusumuzi (DUT, Durban) ; Dang, Thien Thanh (Duisburg-Essen U.) ; Escobar, Marianela (Duisburg-Essen U.) ; Díaz-Guerra, Carlos (Madrid U.) ; Marschick, Georg (Vienna, Tech. U.) ; Masenda, Hilary (Witwatersrand U.) ; Gunnlaugsson, Haraldur P (Iceland U.) et al.
Emission $^{57}$Fe Mössbauer spectroscopy (eMS), following the implantation of radioactive $^{57}$Mn+ ions, has been used to study the temperature dependence of the hyperfine magnetic field at Fe sites in Ba-doped BiFeO$_3$ (BFO) thin films. $^{57}$Mn β decays (t$_{1/2}$ = 90 s) to the 14.4 keV Mössbauer state of $^{57}$Fe, thus allowing online eMS measurements at a selection of sample temperatures during Mn implantation. [...]
2023 - 13 p. - Published in : Crystals 13 (2023) 724 Fulltext: PDF;

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