Positron annihilation spectroscopy of sandstone and carbonate rocks

Autor:	C. A. Quarles, J. M. Urban-Klaehn
Rok vydání:	1999
Předmět:	Materials science Valence (chemistry) Lithology Analytical chemistry General Physics and Astronomy Mineralogy Physics::Geophysics Positron annihilation spectroscopy Outgassing chemistry.chemical_compound Positron chemistry Core electron Carbonate Doppler broadening
Zdroj:	Journal of Applied Physics. 86:355-363
ISSN:	1089-7550 0021-8979
Popis:	The techniques of positron annihilation spectroscopy have been applied to the study of well-characterized reservoir rock samples. In this article we focus primarily on sandstone and carbonate samples. We report (a) measurements of the Doppler broadening (DB) parameters and mean lifetime values (〈τ〉) of dry samples; (b) measurement of the DB parameters as a function of temperature from room temperature to 200 °C; and (c) observation of the outgassing of heated samples simultaneously with the DB measurements. We interpret the measurements in terms of positron annihilation with both valence and core electrons and discuss how the DB parameters depend on the major chemical constituents (lithology) and to a lesser degree on the structure of the samples. The major result of this work is that the positron parameters such DB parameters (S, SW, and W) and mean lifetime values are shown to be reproducible and reliable bulk properties of well-characterized rock samples and can be used to categorize rocks of geophysic...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e025727cc19353499514eb7b3d5b9da6 https://doi.org/10.1063/1.370738 Zobrazit plný text záznamu