搜索结果: 1-15 共查到“知识库 PIXE”相关记录15条 . 查询时间(0.058 秒)
A new facility for High energy PIXE at the ARRONAX Facility
new facility High energy PIXE the ARRONAX Facility
2010/12/29
Proton Induced X-ray Emission (PIXE) using high energy protons is a non destructive multi elemental technique that can analyze medium and heavy trace elements on thick samples. A new experimental setu...
Particle induced X-ray emission (PIXE) is a physical effect that is not yet adequately modelled in Geant4. The current status as in Geant4 9.2 release is reviewed and new developments are described. T...
从燃煤排放污染物到植物叶子中硫的迁移特性PIXE和XANES研究
sulfur PIXE XANES atmospheric particulate patter SO2 leaf
2009/10/10
The impact of coal-burning emission on sulfur in camphor leaves was investigated using Proton Induced X-ray Emission (PIXE) and synchrotron radiation technique X-ray Absorption Near-Edge Structure (XA...
无标样厚靶PIXE分析中数值方法的应用
无标样 厚靶PIXE分析 数值方法
2009/7/27
本文用数值方法对厚靶PIXE分析中所测得的特征K-X射线强度进行修正.修正包括入射质子在靶中的慢化,特征X射线在厚样中的吸收以及基体元素的特征X射线引发的待测元素X射线的增强等.同时,为了进行元标样分析,同蒙特卡罗方法对整个分析系统作了效率刻度.在此基础上,对一些自制的标准厚样进行了PIXE实验分析,分析结果与已知值有较好的符合.
用GUPIXWIN软件解谱的PIXE分析系统刻度
PIXE分析 刻度 GUPIXWIN软件
2010/2/26
使用标准样品比较法，通过计算校正GUPIXWIN中的刻度因子H，对使用GUPIXWIN软件解谱的PIXE分析系统进行了刻度。分析了测得的H值随能量变化的原因，并用刻度后的PIXE系统分析了1组大气颗粒物样品。将GUPIXWIN分析结果与AXIL解谱的结果进行了比较，绝大多数测量结果相对偏差在±10%以内。
Aerosol composition and source apportionment in the Mexico City Metropolitan Area with PIXE/PESA/STIM and multivariate analysis
source apportionment Mexico City Metropolitan Area PIXE/PESA/STIM multivariate analysis
2009/1/15
Aerosols play an important role in the atmosphere but are poorly characterized, particularly in urban areas like the Mexico City Metropolitan Area (MCMA). The chemical composition of urban particles m...
样品位置对外束PIXE分析的影响
外束PIXE 位置 误差
2009/1/13
通过改变标准样品的前后位置和摆放角度，研究样品位置对外束PIXE分析中Ar、Si、Ca、Fe等元素的特征X射线归一化峰面积的影响，并以此为依据分析外束PIXE对样品定位精度的要求。结果表明：为使由样品位置变化引起的相对误差在5%以内，样品摆放位置需精确到±0.14mm；为使由样品角度引起的相对误差在5%以内，样品摆放角度需精确到±1°。
应用质子激发X射线分析（PIXE）测定啤酒中的微量元素
PIXE 啤酒 痕量元素
2009/1/12
一、引言 营养卫生学的研究中,痕量元素日益受到人们的重视。为了保证人体对于15种必需痕量元素的补充以及保证毒性元素的摄入在允许剂量之内,从痕量元素含量角度来研究食品和饮料的质量是很重要的。PIXE提供了多种痕量元素含量的同时测定方法。啤酒中微量元素很丰富。啤酒的颜色,芳香,味道和储存质量都和所含微量元素的浓度有关。
用PIXE方法分析人发中微量元素时数据质量问题剖析
质子激发X荧光分析 数据质量
2009/1/9
头发是人体排泄微量元素的器官之一,头发中微量元素的含量间接地反映人体中微量元素的含量。头发中微量元素的含量能反映一定时间内人体微量元素含量的情况。它可以作为环境条件和人体功能的“指示器”,给出环境污染和人体健康与疾病的信息。而发样又
外束PIXE分析装置及其初步应用
应用 外束PIXE分析装置
2008/5/4
在GIC4117串列加速器上引出质子外束，引出窗口采用75μm厚Kapton膜。在外束管道前的RBS靶室中放置175nm金箔和金硅面垒探测器，可在外束PIXE分析的同时，用Au的RBS峰面积来监测束流积分。利用这一装置对古陶瓷和2幅书法作品进行分析。
Multielemental Analysis of Genetically Modified Food using ANAA and PIXE Techniques
Genetically Modified Food ANAA and PIXE Techniques
2010/10/15
This paper describes the application of two techniques, ANAA and PIXE, used in the analyses of some available commercial food containing regular and genetically modified ingredients, as well as soyben...
Trace Element Concentration in São Francisco River Water Using STXRF and PIXE Techniques
Trace Element Concentration Sã o Francisco River Water STXRF and PIXE Techniques
2010/10/15
Trace element concentrations in water from S˜ao Francisco River using Particle Induced X-ray Emission (PIXE) and Synchroton Total Reflection X-ray Fluorescence (STXRF) techniques are measured. Th...
PIXE, Particel Induced X-Ray Emission A Concise Review
particle induced X-ray emission elemental analysis trace element ion induced X-ray
2010/6/30
PIXE-Particle Induced X-Ray Emission is a multielemental, sensitive and non-estructive method which has been in use in trace elemental analysis since 1970. This review aims to explain the main feature...