Positron Annihilation Spectroscopy
نویسنده
چکیده
Positron annihilation spectroscopy is nowadays well recognised as a powerful tool of microstructure investigations of condensed matter. An overview of the method aimed for users from other fields is given and supplemented with several examples of applications.
منابع مشابه
Positron annihilation lifetime spectroscopy in nickel ferrite and iron oxide nanopowders
In this study, a positron annihilation lifetime spectrometer was set up and its resolution was optimized. The spectrometer is a fast-slow arrangement with time resolution of 250 ps. To obtain lifetime components and their intensities from analyzing positron annihilation lifetime spectrum, the Pascual software is used. Positrons are from a source of radioactive 22NaCl with 20 μCi activity enclos...
متن کامل1 AP / P 5 - 05 Applications of Positron Annihilation Spectroscopy
Positron annihilation spectroscopy techniques are well established nuclear techniques with applications which nowadays range from structural investigations of materials to investigations of biological samples and medical imaging. They have extensively been used more than thirty years, but with constant improvements in measuring methods and with new applications, especially in investigations of ...
متن کاملInfluence of Polymer Crystallinity and Morphology on Positron Annihilation Characteristics
Some most representative results for semicrystalline polymers by positron annihilation spectroscopy method, showing the influence of crystallinity and morphology of samples on positron annihilation characteristics, are reminded. The latest finding of the author’s experiment on modified polyamide 6 is presented. The latter reveals that the interfacial zone between a lamella and an amorphous regi...
متن کاملپایداری سامانه اندازهگیری طول عمر پوزیترون و بررسی نوع و غلظت عیب ناشی از تابش الکترونهای 10 مگا الکترون ولتی بر نمونههای سیلیکونی نوع n و p
Positron annihilation lifetime spectroscopy method with valuation of non-destructive investigation of material, provides information about electron density, defect concentration, type of defects and atoms around the defects. The stability of the system was tested with a source. The time resolution of the whole system has been derived about 365 ps at FWHM. Then n- and p-type silicon samples we...
متن کامل