Luminescence spectroscopy of Ln-doped Bi-containing phosphates and molybdates. (July 2016)

• Record Type: Journal Article
• Authors: Hizhnyi, Yu; Chornii, V.; Nedilko, S.; Slobodyanik, M.; Terebilenko, K.; Boyko, V.; Gomenyuk, O.; Sheludko, V.
• Is Part Of: Radiation measurements. Volume 90(2016:Jul.)
• Page Start: 314
• Page End: 318
• Publication Date: 2016-07
• Subjects: Luminescence -- Eu -- Bismuth -- Phosphate -- Molybdate; Nuclear emulsions -- Periodicals; Particle tracks (Nuclear physics) -- Periodicals; Thermoluminescence -- Periodicals; Cosmic rays -- Periodicals; Radiation -- Measurement -- Periodicals; Radiometry -- Periodicals; Radiation Monitoring -- Periodicals; Émulsions nucléaires -- Périodiques; Particules (Physique nucléaire) -- Traces -- Périodiques; Thermoluminescence -- Périodiques; Rayonnement cosmique -- Périodiques; Radiométrie -- Périodiques; 539.77
• DOI: 10.1016/j.radmeas.2016.01.014
• Languages: English
• ISSNs: 1350-4487

Abstract

Abstract: The photoluminescence (PL) emission and excitation spectra of undoped and doped with rare-earth (RE = Eu, Tb) ions K3 Bi5 (PO4 )6 and K2 Bi(PO4 )(MoO4 ) crystals are studied in 3.7–14 eV region of the excitation photon energies at T = 8 and 300 K. The mechanisms of the host-related and RE-related luminescence in 3.7–7 eV region of the excitation photon energies are revealed in comparative analysis of the PL spectra of studied compounds. It is assumed that the excitation mechanisms of host luminescence of K3 Bi5 (PO4 )6 and K2 Bi(PO4 ) (MoO4 ) crystals below 4.8 eV are related to Bi 3+ ions in oxygen surrounding. An efficient energy transfer from the Bi 3+ -related luminescence centers to the emitting RE centers exists in crystals with low concentration of the RE dopants (1%). The PL excitation spectra of K3 Bi5 (PO4 )6 crystals with high concentration of Eu dopants are formed by O – Eu CT transitions. Highlights: PL excitation of K3 Bi5 (PO4 )6 and K2 Bi(PO4 )(MoO4 ) is related to Bi 3+ ions. Energy transfer from Bi 3+ to Eu 3+ exists in K3 Bi5 (PO4 )6 :Eu and K2 Bi(PO4 )(MoO4 ):Eu. PL excitation spectra of K2 Eu(PO4 )(MoO4 ) are formed by O – Eu CT transitions.