Analytical application of positron lifetime spectroscopy in the characterization of binary solid solutions

A. Porto; W. Magalhães; C. Carvalho; J. Machado

doi:10.1007/bf02038253

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 198: Issue 1

Analytical application of positron lifetime spectroscopy in the characterization of binary solid solutions

Authors:

A. Porto

A. Porto ICEx-UFMG Laboratório de Espectroscopia de Aniquilação de Pósitrons-LEAP Departamento de Química CP 702 CEP 30270-901 Belo Horizonte (Brazil)

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W. Magalhães

W. Magalhães ICEx-UFMG Laboratório de Espectroscopia de Aniquilação de Pósitrons-LEAP Departamento de Química CP 702 CEP 30270-901 Belo Horizonte (Brazil)

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C. Carvalho

C. Carvalho ICEx-UFMG Laboratório de Espectroscopia de Aniquilação de Pósitrons-LEAP Departamento de Química CP 702 CEP 30270-901 Belo Horizonte (Brazil)

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J. Machado

J. Machado ICEx-UFMG Laboratório de Espectroscopia de Aniquilação de Pósitrons-LEAP Departamento de Química CP 702 CEP 30270-901 Belo Horizonte (Brazil)

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Pages:: 151–159

Online Publication Date:: 13 Aug 2005

Publication Date:: 17 Nov 1995

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02038253

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Abstract

Positron Lifetime Spectroscopy (LS) measurements were performed in a series of binary molecular solid solutions of the general formula M_1–xG_xL₃, where L(ligand)=acetylacetone, dipivaloylmethane, or N-benzoyl-N-phenylhydroxylamine, M=Al(III), Ga(III) or In(III), as matrix, and G=Cr(III), Mn(III), Fe(III), Co(III), Ru(III), Rh(III) and Ir(III), as guest molecules, and the corresponding mechanical mixtures. For the solid solutions, the o-Ps yield values (I₃) decrease very rapidly with the increase of the guest mole fraction, showing a high efficient Ps inhibition process, while for the corresponding mechanical mixtures, these values decrease linearly with the increase of the guest molecule concentration, indicating the presence of two distinct phases. These results confirm our previous proposal that the LS technique is able to characterize solid solutions formed by one matrix, in whichI₃ values are high, and one guest, in which theI₃ values are very low.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)