Analytical model for release calculations in solid thin-foils ISOL targets
Abstract
A detailed analytical model has been developed to simulate isotope-release curves from thin-foils ISOL targets. It involves the separate modelling of diffusion and effusion inside the target. The former has been modelled using both first and second Fick's law. The latter, effusion from the surface of the target material to the end of the ionizer, was simulated with the Monte Carlo code MolFlow+. The calculated delay-time distribution for this process was then fitted using a double-exponential function. The release curve obtained from the convolution of diffusion and effusion shows good agreement with experimental data from two different target geometries used at ISOLDE. Moreover, the experimental yields are well reproduced when combining the release fraction with calculated in-target production.
Keywords
Cite
@article{arxiv.1606.06485,
title = {Analytical model for release calculations in solid thin-foils ISOL targets},
author = {Luca Egoriti and Stef Boeckx and Lars Ghys and Donald Houngbo and Lucia Popescu},
journal= {arXiv preprint arXiv:1606.06485},
year = {2016}
}
Comments
accepted for publication in Nuclear Inst. and Methods in Physics Research A