Systematic p-process isotopic anomalies observed in the Kapoeta meteorite

Abstract

In this study, Sr, Ba, Ce, Nd, Sm, and Gd isotopic compositions of sequential acid-leachates from the Kapoeta meteorite (howardite) were determined to find systematic and correlated variations in their p-process isotopic abundances leading to an understanding of the irradiation condition by cosmic rays. Significantly large excesses of p-process isotopes, ⁸⁴Sr, ¹³⁰Ba, ¹³²Ba, ¹³⁶Ce, ¹³⁸Ce, and ¹⁴⁴Sm were observed, particularly in the first chemical separate。