X-ray spectrometric determination of thorium in soil samples using the (γ,n) reaction

被引：0

作者：

Maslov O.D. ^{[1
]}

Molokanova L.G. ^{[1
]}

Gustova M.V. ^{[1
]}

Dmitriev S.N. ^{[1
]}

机构：

[1] Flerov Lab. of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Moscow Oblast, Russia

来源：

Radiochemistry | 2004年 / 46卷 / 4期

关键词：

Physical Chemistry; Inorganic Chemistry; Detection Limit; Soil Sample; Electron Energy;

D O I：

10.1023/B:RACH.0000039121.31461.a9

中图分类号：

学科分类号：

摘要：

A highly sensitive (detection limit 3 ×10 -7 g g -1) procedure was developed for determination of Th in samples of soils and environmental objects. The method is based on the reaction 232Th(γ,n) 231Th (T1/2 = 25.5 h). The samples were γ-irradiated for 4 h at an average electron current of 15 μA and electron energy E e = 24.5 MeV. The Th content was estimated by recording X-ray emission of 231Th with E γ = 25.65 keV. The X-ray spectra of the irradiated samples were recorded on an X-ray spectrometer with an Si(Li) semiconductor detector [30 mm 2 area; resolution at the FeK α line (6.4 keV) 200 eV].

引用

页码：403 / 405

页数：2

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