The Role of Sintering in the Synthesis of Luminescence Phosphors

A prototype, glassless densitometer traceable to primary optical standards for quantitative radiochromic film dosimetry

“…The light source emission spectrum used for the OD CRM,Epson calculation was estimated from the photoluminescent properties of luminescent phosphors common to cold-cathode fluorescent lamps. 37,38 Idealized unit detector response function with ranges (410-475 nm), (476-575 nm), and (576-725 nm) for the blue, green, and red color channels, respectively, was assumed. Error attributed to the particular assumed spectra is expected to be minimal, since ND filter absorbance is, by definition, weakly dependent on wavelength.…”

Microscopic Examination of Cold Spray Cermet Sn+In2O3Coatings for Sputtering Target Materials

“…They are more uniform promoting the films with lower resistivity [ 6 , 18 ]. However, ceramic oxide targets are prepared by hot pressing, where it is difficult to obtain uniform pressure across the target surface, leading to the problems of target warp or cracking [ 19 – 24 ]. What is more, such a target suffers from nonuniformity of density as well as nonuniformity of chemical and physical properties across the target body (caused by nonuniform distribution of tin ions and oxygen vacancies).…”

“…These nodules usually possess a shape of a hillock, cone, or pyramid and tend to grow as the deposition run proceeds. Formation of nodules affects sputtering process by changing sputtering rate, angular distribution of sputtered atoms, enhanced arcing, and process drift and destabilization, which in turn result in defects and lead to poor quality sputtered films [ 1 , 2 , 10 , 19 – 24 , 26 ]. As a result the deposition process has to be interrupted cyclically in order to clean the target surface from nodules and debris.…”

Investigation of luminescence and scintillation properties of a ZnS–Ag/6LiF scintillator in the 7–295K temperature range

“…The holes are then trapped by Ag þ which replaces regular Zn 2 þ ions on their sites, while electrons can be captured by shallow levels of charge-compensating sites associated with either impurities or intrinsic defects. Subsequent recombination of electrons with these holes results in the characteristic blue emission of ZnS-Ag phosphor [6][7][8][9][10][11][12]. The decrease of temperature results in an increase of the emission intensity that is a typical feature of recombination luminescence.…”

“…[5][6][7][8][9][10]). The mechanism behind the intense emission band at 450 nm is now well established as being due to to recombination of spatially separated donor-acceptor pairs.…”