Annealing studies combined with low temperature emission Mössbauer spectroscopy of short-lived parent isotopes: Determination of local Debye–Waller factors

H. P. Gunnlaugsson; H. Masenda; T.E. Mølholt; K. Bharuth-Ram; S. Ólafsson; K. Johnston; J. Schell; H. P. Gislason; P. B. Krastev; R. Mantovan; D. Naidoo; B. Qi; I. Unzueta

doi:10.1063/5.0020951

Annealing studies combined with low temperature emission Mössbauer spectroscopy of short-lived parent isotopes: Determination of local Debye–Waller factors

H. P. Gunnlaugsson^*, H. Masenda, T.E. Mølholt, K. Bharuth-Ram, S. Ólafsson, K. Johnston, J. Schell, H. P. Gislason, P. B. Krastev, R. Mantovan, D. Naidoo, B. Qi, I. Unzueta

^*Corresponding author for this work

Department of Health Technology

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Abstract

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 (T_½ = 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, characterized by changes in the Sn⁴⁺ emission profile, and is attributed to the annihilation of close Frenkel pairs.

Original language	English
Article number	013901
Journal	Review of Scientific Instruments
Volume	92
Issue number	1
Number of pages	7
ISSN	0034-6748
DOIs	https://doi.org/10.1063/5.0020951
Publication status	Published - 2021

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Gunnlaugsson, H. P., Masenda, H., Mølholt, T. E., Bharuth-Ram, K., Ólafsson, S., Johnston, K., Schell, J., Gislason, H. P., Krastev, P. B., Mantovan, R., Naidoo, D., Qi, B., & Unzueta, I. (2021). Annealing studies combined with low temperature emission Mössbauer spectroscopy of short-lived parent isotopes: Determination of local Debye–Waller factors. Review of Scientific Instruments, 92(1), Article 013901. https://doi.org/10.1063/5.0020951

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title = "Annealing studies combined with low temperature emission M{\"o}ssbauer spectroscopy of short-lived parent isotopes: Determination of local Debye–Waller factors",

abstract = "An extension of the online implantation chamber used for emission M{\"o}ssbauer 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 M{\"o}ssbauer 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, characterized by changes in the Sn4+ emission profile, and is attributed to the annihilation of close Frenkel pairs.",

author = "Gunnlaugsson, {H. P.} and H. Masenda and T.E. M{\o}lholt and K. Bharuth-Ram and S. {\'O}lafsson and K. Johnston and J. Schell and Gislason, {H. P.} and Krastev, {P. B.} and R. Mantovan and D. Naidoo and B. Qi and I. Unzueta",

year = "2021",

doi = "10.1063/5.0020951",

language = "English",

volume = "92",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics",

number = "1",

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Gunnlaugsson, HP, Masenda, H, Mølholt, TE, Bharuth-Ram, K, Ólafsson, S, Johnston, K, Schell, J, Gislason, HP, Krastev, PB, Mantovan, R, Naidoo, D, Qi, B & Unzueta, I 2021, 'Annealing studies combined with low temperature emission Mössbauer spectroscopy of short-lived parent isotopes: Determination of local Debye–Waller factors', Review of Scientific Instruments, vol. 92, no. 1, 013901. https://doi.org/10.1063/5.0020951

Annealing studies combined with low temperature emission Mössbauer spectroscopy of short-lived parent isotopes: Determination of local Debye–Waller factors. / Gunnlaugsson, H. P.; Masenda, H.; Mølholt, T.E. et al.
In: Review of Scientific Instruments, Vol. 92, No. 1, 013901, 2021.

Research output: Contribution to journal › Journal article › Research › peer-review

TY - JOUR

T1 - Annealing studies combined with low temperature emission Mössbauer spectroscopy of short-lived parent isotopes: Determination of local Debye–Waller factors

AU - Gunnlaugsson, H. P.

AU - Masenda, H.

AU - Mølholt, T.E.

AU - Bharuth-Ram, K.

AU - Ólafsson, S.

AU - Johnston, K.

AU - Schell, J.

AU - Gislason, H. P.

AU - Krastev, P. B.

AU - Mantovan, R.

AU - Naidoo, D.

AU - Qi, B.

AU - Unzueta, I.

PY - 2021

Y1 - 2021

N2 - 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, characterized by changes in the Sn4+ emission profile, and is attributed to the annihilation of close Frenkel pairs.

AB - 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, characterized by changes in the Sn4+ emission profile, and is attributed to the annihilation of close Frenkel pairs.

U2 - 10.1063/5.0020951

DO - 10.1063/5.0020951

M3 - Journal article

C2 - 33514210

SN - 0034-6748

VL - 92

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 1

M1 - 013901

ER -

Annealing studies combined with low temperature emission Mössbauer spectroscopy of short-lived parent isotopes: Determination of local Debye–Waller factors

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