Title :
Optical and luminescence properties of complex lead oxides
Author :
Kamenskikh, I.A. ; Kirm, M. ; Kolobanov, V.N. ; Mikhailin, V.V. ; Orekhanov, P.A. ; Shpinkov, I.N. ; Spassky, D.A. ; Vasil, A.N. ; Zadneprovsky, B.I. ; Zimmerer, G.
Author_Institution :
Dept. of Phys., Lomonosov (M.V.) State Univ., Moscow, Russia
Abstract :
Reflectivity, luminescence, and excitation spectra as well as nanosecond luminescence decay kinetics were measured for PbSO/sub 4/ and PbCO/sub 3/ (as well as CaCO/sub 3/:Pb) by photon excitation between 4 and 35 eV. These measurements were compared to those of PbWO/sub 4/ in order to establish the role of lead states in these compounds, which are potentially interesting as scintillators. New luminescence bands were observed in PbSO/sub 4/ at 340 nm and in PbCO/sub 3/ at 320 nm. Luminescence properties are discussed, assuming the lead parentage of electronic states in the vicinity of the forbidden energy bandgap.
Keywords :
band structure; calcium compounds; energy gap; lead; lead compounds; photoluminescence; reflectivity; scintillation; time resolved spectra; visible spectra; 320 nm; 340 nm; 4 to 35 eV; CaCO/sub 3/:Pb; PbCO/sub 3/; PbSO/sub 4/; PbWO/sub 4/; excitation spectra; forbidden energy bandgap; luminescence; nanosecond luminescence decay kinetics; reflectivity; scintillators; Crystals; Excitons; Kinetic theory; Lead compounds; Luminescence; Optical materials; Photonic band gap; Physics; Reflectivity; Temperature distribution;
Journal_Title :
Nuclear Science, IEEE Transactions on
