A Mossbauer study on solid krypton precipitates in aluminium

• Published in: Journal of physics. Condensed matter 1993-05, Vol.5 (22), p.3541-3554
• Main Authors: Greuter, M J W, Niesen, L
• Format: Article
• Language: English
• Subjects: Applied sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Metals. Metallurgy; Mössbauer effect; other γ-ray spectroscopy; Physics
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/0953-8984/5/22/006

Mossbauer spectroscopy on the 9.40 keV transition exp 83 Kr is used to obtain information about solid Kr precipitates in Al. Three different exp 83 RbI sources differing in water content were used, which, when measured against a solid Kr absorber, show a quadrupole component in addition to a dominating single line. An analytical deconvolution technique is presented which takes care of the source characteristics. The spectra of Kr bubbles in Al obtained by high-dose implantation show two components: a single line from Kr atoms inside the bubble and a quadrupole split component from Kr at the Kr-Al interface. Spectra were taken as a function of temperature. The total absorption area could be fitted very well assuming a simple Debye model, yielding a Debye temperature of Theta exp T sub D =101(2)K. A decomposition of the total area in the areas of quadrupole and single-line components yields Debye temperature of Theta exp Q sub D =98(6)K and Theta exp S sub D =90(10)K, respectively.