Tests of high-density UC targets developed at Gatchina for neutron-rich radioactive-beam facilities

Lhersonneau, G.; Alyakrinskiy, O.; Bajeat, O.; Barzakh, A. E.; Dubois, M.; Eléon, C.; Essabaa, S.; Fedorov, D. V.; Gaubert, G.; Ionan, A. M.; Ivanov, V.; Jardin, P.; Lanchais, A.; Lau, C.; Leroy, R.; Mezilev, K. A.; Mhamed, M. Cheikh; Moroz, F. V.; Orlov, S. Yu.; Panteleev, V. N.; Rizzi, V.; Roussière, B.; Laurent, M. G. Saint; Stroe, L.; Tecchio, L.; Villari, A. C. C.; Volkov, Yu. M.

doi:10.1016/j.nimb.2008.05.033

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…GATCHINA is obviously dense (effective density of 13.1 g cm À3 to be compared with the theoretical value of 13.65 g cm À3 for UC) and has a 5% open porosity. The apparent density, 12.4 g cm À3 , is in agreement with published data [9][10][11][12].…”

Section: Density and Porositysupporting

confidence: 91%

“…GATCHINA pellets were obtained by powder metallurgy from uranium and graphite, as previously published [9][10][11][12]. The pellets used in this work presented an apparent density of 12.7 g cm À3 and an average grain size of 6 lm.…”

Section: Synthesis Of the Pelletsmentioning

confidence: 99%

“…Recent experimental research aimed to correlate the submicron-scale porosity of materials with a significant improvement of their release properties. Firstly, very dense UC x -based targets were developed by hot uniaxial pressing [9][10][11][12] and tested: the samples with 20 lm diameter grains of uranium monocarbide (UC) exhibited higher releases for all Rb and Cs isotopes than with a ISOLDE-type target. Then, porous structures were investigated, such as studies at SPES with the use of multi-wall carbon nanotubes (MWCNT) as carbon source [4].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of uranium carbide target materials to produce neutron-rich radioactive beams

Tusseau‐Nenez

Roussière

Barré-Boscher

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Density and Porositysupporting

confidence: 91%

Section: Synthesis Of the Pelletsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of uranium carbide target materials to produce neutron-rich radioactive beams

Tusseau‐Nenez

Roussière

Barré-Boscher

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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“…Release of Cs and Rb were reported to be better from such low-density carbide targets than from high-density ones. However, Lhersonneau et al [ 12 ] described in a review on the performance of high-density UC x targets with grain sizes of ~200 µm, developed in the IRIS facility at Gatchina (Russia), that they show an excellent Cs and Rb production performance, with a yield higher than the low-density, 25 µm–35 µm targets in use at PARRNe-Orsay. Nevertheless, a slower release was observed, which was surpassed by new, high-density, UC x materials with grain sizes of ~20 µm.…”

Section: Introductionmentioning

confidence: 99%

Uranium Carbide Fibers with Nano-Grains as Starting Materials for ISOL Targets

et al. 2020

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This paper presents an experimental study about the preparation, by electrospinning, of uranium carbide fibers with nanometric grain size. Viscous solutions of cellulose acetate and uranyl salts (acetate, acetylacetonate, and formate) on acetic acid and 2,4-pentanedione, adjusted to three different polymer concentrations, 10, 12.5, and 15 weight %, were used for electrospinning. Good quality precursor fibers were obtained from solutions with a 15% cellulose acetate concentration, the best ones being produced from the uranyl acetate solution. As-spun precursor fibers were then decomposed by slow heating until 823 K under argon, resulting in a mixture of nano-grained UO2 and C fibers. A last carboreduction was then carried out under vacuum at 2073 K for 2 h. The final material displayed UC2−y as the major phase, with grain sizes in the 4 nm–10 nm range. UO2+x was still present in moderate concentrations (~30 vol.%). This is due to uncomplete carboreduction that can be explained by the fiber morphology, limiting the effective contact between C and UO2 grains.

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“…Very dense pellets of uranium monocarbide were synthesized at PNPI in Russia by hot pressing [11]- [13]. The very low release fractions of the fission products (FPs) measured at 1600 °C were attributed to the low open porosity (5%) in the material [14].…”

Section: Introductionmentioning

confidence: 99%

Development of radioactive beams at ALTO: Part 1. Physicochemical comparison of different types of UCx targets using a multivariate statistical approach

Guillot

Tusseau‐Nenez

Roussière

et al. 2018

Nuclear Instruments and Methods in Physics Research Section B:

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Tests of high-density UC targets developed at Gatchina for neutron-rich radioactive-beam facilities

Cited by 6 publications

References 14 publications

Characterization of uranium carbide target materials to produce neutron-rich radioactive beams

Characterization of uranium carbide target materials to produce neutron-rich radioactive beams

Uranium Carbide Fibers with Nano-Grains as Starting Materials for ISOL Targets

Development of radioactive beams at ALTO: Part 1. Physicochemical comparison of different types of UCx targets using a multivariate statistical approach

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