Measurement background and the sediment age-dating reach of 32Si

被引：2
|
作者：
Keillor, Martin E. [1 ]
Aalseth, Craig E. [1 ]
Arrigo, Leah M. [1 ]
Brandenberger, Jill M. [2 ]
Cloutier, Janet M. [1 ]
Eiden, Gregory C. [1 ]
Fast, James E. [1 ]
Finch, Zachary S. [1 ]
Gill, Gary A. [2 ]
Hossbach, Todd W. [1 ]
Overman, Cory T. [1 ]
Seiner, Brienne N. [1 ]
Strivens, Jonathan E. [2 ]
机构：
[1] Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA
[2] Pacific NW Natl Lab, 1529 West Sequim Bay Rd, Sequim, WA 98382 USA
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2016年 / 307卷 / 03期
关键词：
Age dating; Low-background beta detection; Low-background materials; Sediment geochronology; Sedimentary reconstruction; Si-32; LAKE-SEDIMENTS; PUGET-SOUND; INPUTS; RATES; 20TH-CENTURY; SIGNATURES; METALS; AMS;
D O I：
10.1007/s10967-015-4592-5
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Detector sensitivity and purification challenges have limited published Si-32 sediment dating studies. The cosmogenic isotope Si-32 can fill the sediment geochronology gap between Pb-210 (< 150 years) and C-14 (> 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 Si-32 age-dating reach. Design and performance of new low-background, gas-proportional beta counters to measure Si-32 (via P-32) are discussed.
引用
收藏
页码：2313 / 2319
页数：7
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    Craig E. Aalseth
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    James E. Fast
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    Jonathan E. Strivens
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