1953/12/01 by Clair C. Patterson, H. Brown, G. R. Tilton +1 · 5 citations
Physics and Astronomy · #Astro and Planetary Science #Planetary Science and Exploration #Scientific Research and Discoveries
paper · doi:10.1103/physrev.92.1234
openalex publication_date 1953/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
The cosmic abundance of lead and uranium have been determined by studying the lead and uranium contents of meteoritic materials. Lead is found to be present to 8\ifmmode×\else\texttimes\fi10^\ensuremath-3 atom/10 000 atoms of silicon, and uranium to 1\ifmmode×\else\texttimes\fi10^\ensuremath-4 atom/10 000 atom of silicon. The new value for lead removes the hump in the cosmic abundance curve in the 206-208 mass region. The relative primordial abundances of lead isotopes of mass 204, 206, 207, and 208 are found to be 1:9.4:10.3:29.2, respectively.