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Instruments and methods of investigation


Positron annihilation spectroscopy in materials structure studies

,
Russian Federation State Scientific Center ‘A.I. Alikhanov Institute of Theoretical and Experimental Physics’, ul. Bolshaya Cheremushkinskaya 25, Moscow, 117259, Russian Federation

A relatively new method of materials structure analysis — positron annihilation spectroscopy (PAS) — is reviewed. Measurements of positron lifetimes, the determination of positron 3γ- and 2γ-annihilation probabilities, and an investigation of the effects of different external factors on the fundamental characteristics of annihilation constitute the basis for this promising method. The ways in which the positron annihilation process operates in ionic crystals, semiconductors, metals and some condensed matter systems are analyzed. The scope of PAS is described and its prospects for the study of the electronic and defect structures are discussed. The applications of positron annihilation spectroscopy in radiation physics and chemistry of various substances as well as in physics and chemistry of solutions are exemplified.

Fulltext pdf (346 KB)
Fulltext is also available at DOI: 10.1070/PU2002v045n01ABEH000971
PACS: 71.60.+z, 78.70.Bj, 82.55.+e (all)
DOI: 10.1070/PU2002v045n01ABEH000971
URL: https://ufn.ru/en/articles/2002/1/c/
000175529500003
Citation: Grafutin V I, Prokop’ev E P "Positron annihilation spectroscopy in materials structure studies" Phys. Usp. 45 59–74 (2002)
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Оригинал: Графутин В И, Прокопьев Е П «Применение позитронной аннигиляционной спектроскопии для изучения строения вещества» УФН 172 67–83 (2002); DOI: 10.3367/UFNr.0172.200201c.0067

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