Branken, D.J.; Lachmann, G.; Krieg, H.M.; Bruinsma, O.S.L. (Wiley, 2011)
Because of the low absorption cross-section for thermal neutrons of zirconium (Zr) as opposed to hafnium (Hf), Zr-metal must essentially be Hf-free (<100 ppm Hf) to be suitable for use in nuclear reactors. However, Zr and ...