Section II. On-line separator systems and target techniquesRecent development of high-temperature metal targets for ISOLDE
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Cited by (36)
Porous TaC<inf>x</inf> ISOL target materials from mould-casted Ta<inf>4</inf>AlC<inf>3</inf>
2021, Journal of the European Ceramic SocietyCitation Excerpt :Ta-based target materials are proposed for the production of 149Tb (half-life T1/2 = 4.118 h) for combined PET (Positron Emission Tomography)/α-therapy in cancer radio-theranostics [9,10], along with other longer-lived terbium (Tb) isotopes, i.e., 152Tb (T1/2 = 17.5 h), 155Tb (T1/2 = 5.32 d) and 156Tb (T1/2 = 5.35 d) for PET, computed tomography, and SPECT (Single-Photon Emission Computed Tomography) [2]. While refractory carbides have already been introduced in the ISOL community for actinide-based targets, such as ThCx and UCx [7,8,11,12], and recently for lighter targets, such as nanometric TiC [13] and SiC [14,15], Ta-based targets have so far only been used in the form of metallic Ta thin foils (melting point ≈ 3016 °C). Therefore, the introduction of TaCx (melting point ≈ 3880 °C, for x = 1) as target material is being investigated in order to increase the refractoriness and the operational time of the target under intense primary beams.
Thick solid targets for the production and online release of radioisotopes: The importance of the material characteristics – A review
2020, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :On a side note, thin foil (25 μm) targets of different metals are used to extract isotopes with the ISOL technique. Since, according to models, spheres of similar dimensions are always better for the release than foils [13], micron sized metal powders have been tried before at ISOLDE (namely titanium) [27]. However, due to fast sintering of this material, the results were unsatisfactory.
Target materials for exotic ISOL beams
2016, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :Nevertheless, the development of such converters can be a major undertaking, due to geometrical constraints and high levels of power deposition [20]. Additional overviews of different target materials, selected material properties and respective radioactive species can be found in [35,74]. The ISOL technique offers a powerful tool for the production of radioactive isotope beams.
Off-line emittance measurements of the SPES ion source at LNL
2011, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated EquipmentCitation Excerpt :For this reason the SIS is a powerful and selective device, and we estimate that a large majority of the SPES RIBs will be delivered using it. The surface ion source adopted for the SPES facility at present is the so called standard MK1 [14] surface ion source developed and used at the ISOLDE facility; it is composed of a Tungsten (W) tubular ionizing cavity (length, external diameter and internal diameter equal to 34, 5 and 3.1 mm, respectively), connected on one side to a Ta support and on the other one to the oven by means of a Ta connector. Behind the Ta support a Ta screen is placed (Fig. 3).
Thermal-electric numerical simulation of a surface ion source for the production of radioactive ion beams
2010, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated EquipmentCitation Excerpt :The radioactive isotopes produced by the 238U fissions are then driven through the transfer line (see Fig. 1) to the surface ion source:1 here they acquire a 1+ charge state so that they are able to be accelerated by electrostatic fields. The surface ion source adopted for the SPES facility is at present the standard MK1 surface ion source [4,5] developed and used at the ISOLDE facility (CERN, Switzerland); it is composed of a tungsten (W) tubular ionizing cavity (length, external diameter and internal diameter equal to 34, 5 and 3.1 mm, respectively) connected on one side to a tantalum (Ta) support (see Fig. 2) and on the other one to the Ta transfer line by means of a Ta connector; behind the Ta support a Ta screen is positioned. Surface ionization is a physical phenomenon according to which when an atom interacts with a heated surface (the surface ion source) it can lose or gain an electron before leaving the surface as a positive or negative singly charged ion.
The development of fast tantalum foil targets for short-lived isotopes
2003, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :The tantalum target, Ta129 [7,8], tested at ISOLDE has foils, 2 μm thick, 15 cm long and 1 cm high, with 50 μm gaps, arranged as shown in Fig. 1 in a standard ISOLDE tantalum target tube with tungsten surface thermal ioniser [12].