Preliminary study of Be-10/Be-7 in rainwater from Xi'an by Accelerator Mass Spectrometry

The Be-10/Be-7 ratio is a sensitive tracer for the study of atmospheric transport, particularly with regard to stratosphere-troposphere exchange. Measurements with high accuracy and efficiency are crucial to Be-7 and Be-10 tracer studies. This article describes sample preparation procedures and anal...

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Bibliographic Details
Published in:Chinese Physics C
Main Authors: Zhang, Li, Fu, Yun-Chong
Format: Article in Journal/Newspaper
Language:English
Published: 2017
Subjects:
Accelerator Mass Spectrometry
Be-7
Be-10
Rainwater
Atmospheric Tracer
Science & Technology
Physical Sciences
ATMOSPHERIC DEPOSITION
AMS CENTER
HALF-LIFE
ICE CORE
PRECIPITATION
TRANSPORT
PB-210
RECONSTRUCTION
REVERSAL
Physics
Nuclear
Particles & Fields
ice core
Online Access:http://ir.ieecas.cn/handle/361006/5535
https://doi.org/10.1088/1674-1137/41/1/018201
Description
Summary:The Be-10/Be-7 ratio is a sensitive tracer for the study of atmospheric transport, particularly with regard to stratosphere-troposphere exchange. Measurements with high accuracy and efficiency are crucial to Be-7 and Be-10 tracer studies. This article describes sample preparation procedures and analytical benchmarks for Be-7 and Be-10 measurements at the Xi'an Accelerator Mass Spectrometry (Xi'an-AMS) laboratory for the study of rainwater samples. We describe a sample preparation procedure to fabricate beryllium oxide (BeO) AMS targets that includes co-precipitation, anion exchange column separation and purification. We then provide details for the AMS measurement of Be-7 and Be-10 following the sequence BeO--> Be2+-> Be4+ in the Xi'an- AMS. The Be-10/Be-7 ratio of rainwater collected in Xi'an is shown to be about 1.3 at the time of rainfall. The virtue of the method described here is that both Be-7 and Be-10 are measured in the same sample, and it is suitable for routine analysis of large numbers of rainwater samples by AMS.

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