Charge integration in external PIXE-PIGE for the analysis of aerosol samples

被引：13
|
作者：
Li, X. F. [1 ]
Wang, G. F. [1 ,2 ]
Chu, J. H. [1 ]
Yu, L. D. [1 ]
机构：
[1] Beijing Normal Univ, Coll Nucl Sci & Technol, Key Lab Beam Technol & Mat Modificat, Minist Educ, Beijing 100875, Peoples R China
[2] Beijing Radiat Ctr, Beijing 100875, Peoples R China
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2012年 / 289卷
关键词：
Beam current integration; External set-up; Faraday cup; Atmospheric aerosol; QUANTITATIVE-ANALYSIS; LIGHT-ELEMENTS; THICK SAMPLES; BEAM;
D O I：
10.1016/j.nimb.2012.08.009
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The beam current in an external-beam PIXE-PIGE is difficult to accurately measure due to ionization along the beam path in the atmosphere. Charge integration was measured using a homemade Faraday cup, and assessed by the peak area of Ar K-alpha X-rays, which were induced by protons near the sample. The X-ray peak integral from a thin Fe reference sample, which was positioned between the exit window and the Faraday cup, was determined to evaluate the performance of the homemade Faraday cup. Moreover, the effects of different membrane filters and samples with different elements on the beam current measurement of the aforementioned methods were studied by placing different blank films or reference standards behind a reference Mn target. The results indicated that the charge measurement of the homemade Faraday cup was reliable for external PIXE-PIGE analysis of aerosol samples. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：1 / 4
页数：4
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