نتایج جستجو برای: روش pixe

تعداد نتایج: 369991  

2002
J. Braziewicz A. Korman U. Majewska

The systematic determination of trace-element concentrations in honey samples was done by the PIXE method using a 2 MeV proton beam and by the total reflection XRF method. The different kinds of honey samples were collected in the period of spring–summer in three places of Poland: in the centre of Warsaw (a highly polluted region) and about 100 km east of Warsaw and 70 km southwest of Warsaw (a...

2010
P. Kothai P. Prathibha I. V. Saradhi G. G. Pandit V. D. Puranik

Coarse and fine particulate matter were collected at a residential area at Vashi, Navi Mumbai and the filter samples were analysed for trace elements using PIXE technique. The trend of particulate matter showed higher concentrations during winter than the summer and monsoon concentration levels. High concentrations of elements related to soil and sea salt were found in PM10 and PM2.5. Also high...

Journal: :Journal of Food Composition and Analysis 2021

• Analyses by PIXE show that tomato paste major elements are Cl, K and Na. Significant differences in concentrations found between at least 2 brands. Fe Al the main constituents of cans Tetra Pak® respectively. Higher concentration canned paste. Increasingly as a function storage time. The elemental three brands Brazilian packed cardboard boxes were determined through Particle-Induced X-ray Emi...

Journal: :Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 2014

2011
H. S. Barnard B. Lipschultz D. G. Whyte

A toroidally-continuous row of bulk tungsten (W) tiles was installed near the typical location of the outer strike–point in the Alcator C-Mod divertor and was removed for analysis after two campaigns (3151 plasma discharges). External beam (in–air) particle induced X-ray emission (PIXE) analysis has been used to observe campaign–integrated Wmigration patterns in the otherwise Mo divertor using ...

2002
Gregory Lapicki

Accuracy of PIXE analyses depends on inner-shell ionization cross sections. These cross sections are often calculated in the ECPSSR theory; results of its variant (that uses DHS wavefunctions) are employed in the GUPIX package. While the ECPSSR theory agrees well with massive compilations of K x-ray production, it deviates systematically from Lsubshell data – in particular, L1 and L2 cross sect...

Journal: :Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 2008

Journal: :Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 2017

Journal: :international journal of environmental research 0
v.a. barrera instituto de física, universidad nacional autónoma de méxico, a.p. 20-364, méxico, d.f., mexico j. miranda instituto de física, universidad nacional autónoma de méxico, a.p. 20-364, méxico, d.f., mexico a.a. espinosa instituto de física, universidad nacional autónoma de méxico, a.p. 20-364, méxico, d.f., mexico j. meinguer instituto de física, universidad nacional autónoma de méxico, a.p. 20-364, méxico, d.f., mexico j.n. martínez instituto de física, universidad nacional autónoma de méxico, a.p. 20-364, méxico, d.f., mexico e. cerón instituto de física, universidad nacional autónoma de méxico, a.p. 20-364, méxico, d.f., mexico j.r. morales

this study is aimed to identify sources of particulate matter with mean aerodynamic diameterbelow 10 μm (pm10) present in the atmosphere of the metropolitan area of mexico city (mamc), usingsamples obtained from january 1st to june 30th, 2009, analyzed with x-ray spectrometric techniques.minivol samplers were used to collect samples on polycarbonate filters in three sites (north, center, andsou...

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