Positron annihilation sites in nano lead sulfide powders

16th International Conference on Positron Annihilation

Rempel, A.A.^1,2 ; Valeeva, A.A.^1,2 ; Sato, K.^3 ; Kozhevnikova, N.S.^1

Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, Pervomaiskaya 91, Ekaterinburg 620990, Russia^1

Ural Federal University Named after First President of Russia B.N. Yeltsin, Mira 19, Ekaterinburg, 620002, Russia^2

Department of Environmental Sciences, Tokyo Gakugei University, Nukuikita 4-1-1, Koganei, Tokyo 184-8501, Japan^3

关键词: Aqueous medium;    Chemical-bath deposition;    Different particle sizes;    Doppler broadening measurements;    Nano lead;    Positron lifetime;    Positron-electron annihilation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/443/1/012013/pdf
DOI  :  10.1088/1742-6596/443/1/012013

来源: IOP

【 摘 要 】

The coincident Doppler broadening of the positron-electron annihilation radiation has been applied for the identification of vacancies in nano lead sulfide (nano-PbS) powders. The results of the positron annihilation studies on nano-PbS with different particle size are presented. Nano-PbS specimens have been synthesized by the chemical bath deposition in aqueous medium. Independently of the size of nanoparticles (from 12 to 16 nm) the positron lifetime (PLT) for all specimens has been found to be the same and equal to 391±1 ps. Independently of the size of nanoparticles the chemical surrounding of positron annihilation sites identified by coincident Doppler broadening measurements was the same, namely lead (Pb).