Résumé
The very-metal-poor halo star CS 31082-001 was discovered to be very strongly r-process-enhanced during the course of a VLT+UVES high-resolution follow-up of metal-poor stars identified in the HK survey of Beers & colleagues. Both the strong n-capture element enhancement and the low C and N content of the star (reducing the CN molecular band contamination) led to the first U-238 abundance measurement in a stellar spectrum (Cayrel et al. 2001), and the opportunity to use both radioactive species U-238 and Th-232 for dating the progenitor to this star. However, age computations all rely on the hypothesis that the r-process pattern is solar, as this was indeed observed in the other famous r-process-enhanced very metal poor stars CS 22892-052 (Sneden et al. 1996, 2000) and HD 115444 (Westin et al. 2000). Here, we investigate whether this hypothesis is verified for CS 31082-001, using a preliminary analysis of over 20 abundances of n-capture elements in the range Z = 38-92.