Refinement of major- and minor-element PIXE analysis of rocks and minerals

被引：22

作者：

Heirwegh, Christopher M. ^{[1
]}

Campbell, John L. ^{[1
]}

Czamanske, Gerald K. ^{[2
,3
]}

机构：

[1] Univ Guelph, Guelph Waterloo Phys Inst, Guelph, ON N1G 2W1, Canada

[2] US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA

[3] 750 West Greenwich Pl, Palo Alto, CA 94303 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2016年 / 366卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

PIXE; Geochemistry; Standardization; Accuracy; Detector linearity; SILICATE MINERALS; MICRO-PIXE; RAY; STANDARDS; ENERGIES;

D O I：

10.1016/j.nimb.2015.10.018

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An attempt has been made to assess the accuracy of the particle-induced X-ray emission (PIXE) fundamental parameters with standards approach to quantifying major- and minor-element constituents of silicate glasses and minerals. A deviation from linearity at low energies in the channel-energy calibration relationship was identified as a source of undesired residues in GUPIX-fitting. A correction for this effect was developed using a general-purpose spectrum fitting program and was incorporated in GUPIX. The PIXE spectra of sixteen well-characterized electron microprobe standards were then processed. Complementary electron probe micro-analysis (EPMA) measurements were used to support the comparison of the PIXE results with previous characterizations. Major element concentrations were found to differ on average from literature values as follows: SiO2 (-0.28 +/- 0.12%), Al2O3 (0.72 +/- 0.74%), MgO (0.11 +/- 0.63%), Na2O (-2.6 +/- 1.2%), K2O (1.1 +/- 0.7%), Cab (-0.35 +/- 0.37%), TiO2 (2.5 +/- 1.9%), MnO (0.8 +/- 4.7%), FeO (0.98 +/- 0.93%). These results indicate that major and minor elemental analysis can be achieved with high accuracy using the present Guelph micro-PIXE setup. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：40 / 50

页数：11

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