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An extension of the online implantation chamber used for emission Mössbauer Spectroscopy (eMS) at ISOLDE/CERN that allows for quick removal of samples for offline low temperature studies is briefly described. We demonstrate how online eMS data obtained during implantation at temperatures between 300 K and 650 K of short-lived parent isotopes combined with rapid cooling and offline eMS measurements during the decay of the parent isotope can give detailed information on the binding properties of the Mössbauer probe in the lattice. This approach has been applied to study the properties of Sn impurities in ZnO following implantation of 119In (T½ = 2.4 min). Sn in the 4+ and 2+ charge states is observed. Above T > 600 K, Sn2+ is observed and is ascribed to Sn on regular Zn sites, while Sn2+ detected at T < 600 K is due to Sn in local amorphous regions. A new annealing stage is reported at T ≈ 550 K …
AIP Publishing LLC
Publication date: 
1 Jan 2021

HP Gunnlaugsson, H Masenda, TE Mølholt, K Bharuth-Ram, S Ólafsson, K Johnston, J Schell, HP Gislason, PB Krastev, R Mantovan, D Naidoo, B Qi, I Unzueta

Biblio References: 
Volume: 92 Issue: 1 Pages: 013901
Review of Scientific Instruments