We report the detection of Cd i ( Z = 48 ) , Lu ii ( Z = 71 ) , and Os ii ( Z = 76 ) in the metal-poor star BD + 17 3248 .
These abundances are derived from an ultraviolet spectrum obtained with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope .
This is the first detection of these neutron-capture species in a metal-poor star enriched by the r -process .
We supplement these measurements with new abundances of Mo i , Ru i , and Rh i derived from an optical spectrum obtained with the High Resolution Echelle Spectrograph on Keck .
Combined with previous abundance derivations , 32 neutron-capture elements have been detected in BD + 17 3248 , the most complete neutron-capture abundance pattern in any metal-poor star to date .
The light neutron-capture elements ( 38 \leq Z \leq 48 ) show a more pronounced even-odd effect than expected from current Solar system r -process abundance predictions .
The age for BD + 17 3248 derived from the Th ii /Os ii chronometer is in better agreement with the age derived from other chronometers than the age derived from Th ii /Os i .
New Hf ii abundance derivations from transitions in the ultraviolet are lower than those derived from transitions in the optical , and the lower Hf abundance is in better agreement with the scaled Solar system r -process distribution .