Development of radioactive beams at ALTO: Part 2. Influence of the UCx target microstructure on the release properties of fission products

Abstract

Producing intense radioactive beams, in particular those consisting of short-lived isotopes requires the control of the release efficiency. The released fractions of 11 elements were measured on 14 samples that were characterized by various physicochemical analyses in a correlated paper (Part 1). A multivariate statistical approach, using the principal component analysis, was performed to highlight the impact of the microstructure on the release properties. Samples that best release fission products consist of grains and aggregates with small size and display a high porosity distributed on small diameter pores. They were obtained applying a mixing of ground uranium dioxide and carbon nanotubes powders leading to homogeneous uranium carbide samples with a porous nanostructure. A modelling under on-line ALTO conditions was carried out using the FLUKA code to compare the yields released by an optimized and a conventional target.

References in corpus (3)

• Development of radioactive beams at ALTO: Part 1. Physicochemical comparison of different types of UCx targets using a multivariate statistical approach
• Study of uranium oxide milling in order to obtain nanostructured UCx target
• Influence of target thickness on the release of radioactive atoms

Cited by in corpus (4)

• Resonance scattering in a waveguide with identical thick barriers
• Influence of density and release properties of UCx targets on the fission product yields at ALTO
• Impact of UC2, UC, UBC and UB2 target compositions on the release of fission products
• Extraction of diffusion coefficients from the study of Rb release in different carbon catchers