Conventional electron paramagnetic resonance of Mn2+ in synthetic hydroxyapatite at different concentrations of the doped manganese

Thermal Methods for Enhanced Oil Recovery: Laboratory Testing, Simulation and Oilfields Applications 2017

Murzakhanov, F.^1 ; Mamin, G.^1 ; Voloshin, A.^1 ; Klimashina, E.^2 ; Putlyaev, V.^2 ; Doronin, V.^3 ; Bakhteev, S.^3 ; Yusupov, R.^3 ; Gafurov, M.^1 ; Orlinskii, S.^1

Kazan Federal University, 18 Kremlevskaya Str., Kazan, Russia^1

Lomonosov Moscow State University, Leninski Gori, Moscow, Russia^2

Kazan National Research Technological University, 41 K. Marxa Str., Kazan, Russia^3

关键词: Central peaks;    Concentration Measurement;    Electron paramagnetic resonances (EPR);    Hyperfine structure;    Ore formation;    Spin hamiltonian;    Synthetic hydroxyapatite;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/155/1/012006/pdf
DOI  :  10.1088/1755-1315/155/1/012006

来源: IOP

【 摘 要 】

Powders of synthetic hydroxyapatite doped with Mn2+ions in concentrations from 0.05 till 5 wt. % were investigated by conventional electron paramagnetic resonance (EPR). The parameters of the spin-Hamiltonian are derived. Partially resolved hyperfine structure in the magnetic fields corresponding to g ≈ 4.3 and g ≈ 9.4 is observed. The narrowing of the central peak with concentration is reported. A possibility to use the linewidth and intensity of the central peak for concentration measurements are discussed. The results could be used for the identification and qualification of Mn2+in oil, mining and ore formations.