Electron spin resonance of F centres in irradiated⁴³CaO and other alkaline earth oxides

New ultraviolet B emission from gadolinium activated BaZrO3 phosphor - An electron paramagnetic resonance and optical study

“…In KCl, the observed line width is approximately 20 gauss [42] and in LiCl it is 58 gauss [42]. In other systems like HgI 2 .2HgS [43] and BaO [44], the linewidths are about 10 gauss and 3.5 gauss respectively. In general, a variation in linewidth is observed.…”

Study of Nanomaterials Prepared by Combustion Method Using High Heat Combustion Chamber and Agreement with the Reported Results

“…The empirical formula and the possible structure based on thermal analysis are depicted in Figure 1. comparing the FTIR spectra (discussed below) of the samples arrested at different temperatures as per the TG and DTA analysis, it may be predicted that the indium (III) hydroxide (in case of pure system) was precipitated as In(OH) 3 .H 2 O and it decomposed to In(OH) 3 after 100°C, which further transformed to In 2 O 3 at higher temperature (after 264°C) via a number of plausible paths ( Figure 1). …”

“…In the present study the main aim was to get core shell structure of Indium and tin metallic alloy nanopowder. If the desired nanostructure is obtained having different molar ratio with 12 to 20 nm grain size, electron confinement is expected and one can look for single electron conduction through ITO nanopowder without the formation of a depletion region in the semiconductor region [3].…”

“…In this Indium Tin oxide sample with a natural isotope abundance of 49In NO. 15% show a strong line at g=1.3333 after neutron irradiation in vacuo, which is thought to originate from F centers in the bulk, together with same further lines just to the high-field side which arise form surface centers (Nelson and Frank [20]); on the addition of oxygen those additional lines disappear immediately leaving the F-center line which itself decays slowly (Tench and Nelson) [3]. The sample containing different Sn content showed a distinct hyperfine structure in addition to a strong line at g>2.000 of line-width about 0.1 G; the lines were centered on g>2.000 and the stronger lines have a measured hyperfine splitting of 8.3 ± 0.1 G corresponding to a hyperfine interaction with one nuclear of spin (3/2+2)=7/2 some low intensity lines are also present which probably arise from F-aggregate centers, these are also, observed in the normal ITO powders [21] Selected EPR studies were reported in the Figure 5 and Table 1.…”

“…Even though many materials have been prepared by furnace, in the present work, we report the results of some of the nanocrystalline materials such as In 2 O 3 doped with SnO 2 . ITO particles have been analysed by several researchers and a reasonable understanding has been arrived in transport and optical properties [3].…”