Measurement background and the sediment age-dating reach of 32Si Academic Article uri icon

Overview

abstract

  • Detector sensitivity and purification challenges have limited published 32Si sediment dating studies. The cosmogenic isotope 32Si can fill the sediment geochronology gap between 210Pb (<150 years) and 14C (>1000 years). Targeting this age range can provide geochronological reconstructions of paleoindicators that identify recent human and climate-induced shifts in coastal areas. We are preparing detectors and kilogram-scale sample preparation techniques for such a study of Puget Sound sediments. This work considers the impact of background on counting time and 32Si age-dating reach. Design and performance of new low-background, gas-proportional beta counters to measure 32Si (via 32P) are discussed.

publication date

  • 2015

Research

keywords

    • Age dating
    • Low-background beta detection
    • Low-background materials
    • Sediment geochronology
    • Sedimentary reconstruction
    • 32Si

Identity

Additional Document Info

volume

  • 307

issue

  • 3