¹⁰Be and ¹⁰Be/⁹Be in near Antarctica sediment cores

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The concentration profiles of ⁹Be, ¹⁰Be and ²³⁰Th_exc have been measured in two oceanic sediment cores from near Antarctica in the Pacific. The ¹⁰Be and ⁹Be depth profiles in eleven Pacific cores investigated so far by our group have been summarized, and the variations of ¹⁰Be flux, ⁹Be concentration and ¹⁰Be/⁹Be atomic ratio from core to core are discussed in the light of a scavenging process of the beryllium isotopes.