نتایج جستجو برای: libs pixe

تعداد نتایج: 2063  

2002
G. Weber D. Strivay L. Martinot

Although glass is usually considered as a very stable archaeological material, it can undergo severe degradation. Soda-lime glass, the most common glass throughout ancient times, is particularly sensitive to this problem. The glass surface absorbs moisture from its environment and the contact with CO2 causes Na2O and NaOH to convert to Na2CO3, which is extremely hygroscopic. The subsequent unst...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2013
Chang-Jin Ma Kyung-Chul Hwang Ki-Hyun Kim

This study was carried out to describe the chemical characteristics of individual residual particles in hexagonal snow crystals, which can provide a clue to the aerosol removal mechanism during snowfall. In the present study, to collect snow crystal individually and to identify the elemental composition of individual residues retained in a hexagonal crystal, an orchestration of the replication ...

Simultaneous laser induced- breakdown spectroscopy (LIBS) and acoustic response techniques as well as Laser induced fluorescence (LIF) are applied to investigate the abnormal lymph tissues due to Hodgkin disease. The spectral shift in the emissive fluorescence of the cancerous tissues has been observed respect to the normal ones. Regarding LIBS, the concentrations of Ca and Na trace elements ha...

2010
Matthieu Baudelet Myriam Boueri Jin Yu Samuel S. Mao Xianglei Mao Richard E. Russo

Laser-Induced Breakdown Spectroscopy (LIBS) has been used since 40 years on typical samples such as metals, alloys, rocks. Detection of organic hazards or analysis of biological compounds under atmospheric pressure with LIBS represents a new challenge. For this purpose, we need better understandings of the physico-chemical properties of the plasma in atmosphere and their influences on the LIBS ...

Journal: :Applied spectroscopy 2007
E L Gurevich R Hergenröder

Progress in technology and society continually places new demands on analytical science and more powerful and informative methods need to be developed. One among them is laser-induced breakdown spectroscopy (LIBS), sometimes also referred to as LIPS (laserinduced plasma spectroscopy). Typically, LIBS measurements are conducted with nanosecond time scale lasers. A review by Song et al.1 and two ...

Journal: :Journal of Analytical Atomic Spectrometry 2023

A novel in-air PIXE (Particle Induced X-ray Emission) setup was developed which is capable of the fast, sensitive, fully quantitative characterization elemental composition thin and thick samples for elements with Z > 6.

Journal: :Analytical and Bioanalytical Chemistry 2011

Journal: :Current Biology 2016
Qianwei Li Daoqing Liu Zheng Jia Laszlo Csetenyi Geoffrey Michael Gadd

Electrical energy storage systems such as rechargeable lithium-ion batteries (LiBs) and supercapacitors have shown great promise as sustainable energy storage systems [1-4]. However, LiBs have high specific energy density (energy stored per unit mass) and act as slow, steady suppliers for large energy demands. In contrast, supercapacitors possess high specific power (energy transferred per unit...

2004
Violeta Lazic Roberta Fantoni Francesco Colao Antonio Santagata Antonio Morone Valeria Spizzichino

White marble samples from ancient quarries have been analyzed by Laser Induced Breakdown Spectroscopy (LIBS) both on the bulk material and surface encrustations. With the aim to achieve quantitative results by LIBS, until now not reported on marble materials, calibration standards with CaCO3 matrices doped with certified soils were realized. Very different emission intensities and plasma parame...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بوعلی سینا - دانشکده علوم پایه 1389

با توجه به اهمیت آنالیز مواد جهت بررسی ترکیب و ساختار یک نمونه، به منظور بهبود اثر بخشی آن، از روش-های آنالیزی گوناگونی استفاده می شود. بعنوان نمونه می توان به آنالیز با استفاده از باریکه یونی اشاره کرد. از بین این روش های آنالیزی، آنالیز به روش pixe و rbs که در آنها از باریکه یونی مانند پروتون، دوتریم و ذرات آلفا استفاده می شود، از اهمیت ویژه ای، به دلیل غیرمخرب بودن، برخوردار می باشند. دقت و ...

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