1999/09/01 by K. Knie, Silke Merchel, G. Korschinek +4 · 1 voice · 1 citation
Physics and Astronomy · #Astro and Planetary Science #Nuclear Physics and Applications #Planetary Science and Exploration
paper · pdf · doi:10.1111/j.1945-5100.1999.tb01385.x
openalex publication_date 1999/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/05/21
Abstract— The cosmogenic radionuclide 60 Fe (T 1/2 = 1.49 Ma) was measured in two iron meteorites as well as in the magnetic fractions of a stony‐iron and a stony meteorite by means of accelerator mass spectrometry (AMS). The measured 60 Fe/Fe ratios range from 1.5 × 10‐ 14 to 6.3 × 10‐ 14 and show a significant correlation to the respective concentrations of Ni, which is the main target element. The resulting 60 Fe specific activities correspond to production rates in meteorites in the order of 1 dpm/kg Ni. In addition, model calculations of depth‐ and size‐dependent 60 Fe production rates were performed. Although there are no experimental data for the production cross sections, our measurements are in surprisingly good agreement with the theoretical predictions using production cross sections that were determined by computer model calculations.