Isotopic fractionation during pretreatment for accelerator mass spetrometer measurement of (D3C)2O containing 14C produced by nuclear reaction

J. Park; K. Lee; C. Lee; Y. Kwon; J. Lee; J. Kim; W. Hong

doi:10.1007/s10967-007-7039-9

Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 275: Issue 3

Isotopic fractionation during pretreatment for accelerator mass spetrometer measurement of (D₃C)₂O containing ¹⁴C produced by nuclear reaction

Authors:

J. Park

J. Park Korea Institute of Geoscience and Mineral Resources Daejeon 305-350 Korea

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K. Lee

K. Lee Korea Research Institute of Standards and Science Daejeon 305-340 Korea

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C. Lee

C. Lee Chung-Ang University Seoul 156-756 Korea

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Y. Kwon

Y. Kwon Chung-Ang University Seoul 156-756 Korea

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J. Lee

J. Lee Chung-Ang University Seoul 156-756 Korea

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J. Kim

J. Kim Chung-Ang University Seoul 156-756 Korea

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W. Hong

W. Hong Korea Institute of Geoscience and Mineral Resources Daejeon 305-350 Korea

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Pages:: 627–631

Online Publication Date:: 14 Oct 2007

Publication Date:: 01 Mar 2008

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-007-7039-9

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Abstract

A (D₃C)₂O (d₆-acetone) target was irradiated with semi-monoenergetic neutrons generated from ⁹Be(p,n)⁹B reaction with 20 MeV protons to convert ¹³C and oxygen nuclides in the target into ¹⁴C. With both liquid scintillation counting (LSC) and accelerator mass spectrometry (AMS) we measured the (D₃C)₂O (d₆-acetone) liquid targets, which were combustible and easy to afford CO₂ for the AMS measurements. The ¹⁴C yield measured by the LSC method turned out to be 80 times larger than that by the AMS method. This large discrepancy may be attributed to the loss of ¹⁴C atoms during the sample pretreatment in the AMS method such as combustion and cryogenic trapping of CO₂. It means that ¹⁴C newly produced by nuclear reactions can exist in various chemical forms, i.e., C₃D₆O, CO, CO₂, hydrocarbons, etc., and a simple sample pretreatment right after production can cause serious isotopic fractionation. Therefore, using the AMS method, extreme caution in sample pretreatment should be exercised when the ¹⁴C yield produced immediately by nuclear reaction is measured.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)