Post-irradiation analysis of an ISOLDE lead-bismuth target: Stable and long-lived noble gas nuclides

I. Leya , A. Grimberg (1) , J.C. David (2) , D. Schumann , J. Neuhausen , L. Zaninini , E Noah,

1 Institute for Isotope Geology and Mineral Resources
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

We measured the isotopic concentrations of long-lived and stable He, Ne, Ar, Kr, and Xe isotopes in a sample from a lead-bismuth eutectic target irradiated with 1.0 and 1.4 GeV protons. Our data indicate for most noble gases nearly complete release with retention fractions in the range of percent or less. Higher retention fractions result from the decay of long-lived radioactive progenitors from groups 1, 2, or 7 of the periodic table. From the data we can calculate a retention fraction for H-3 of 2-3%. For alkaline metals we find retention fractions of about 10%, 30%, and 50% for Na, Rb, and Cs, respectively. For the alkaline earth metal Ba we found complete retention. Finally, the measured Kr and Xe concentrations indicate that there was some release of the halogens Br and I during and/or after the irradiation

Domains: Nuclear Experiment [nucl-ex]

I. Leya, A. Grimberg, J.C. David, D. Schumann, J. Neuhausen, et al.. Post-irradiation analysis of an ISOLDE lead-bismuth target: Stable and long-lived noble gas nuclides. Journal of Nuclear Materials, 2016, 475, pp.19. ⟨10.1016/j.jnucmat.2016.03.013⟩. ⟨cea-01504943⟩