Clear sharp peak

An example of magnetic contributions to the specific heat is reported in Fig. 3.9 that shows the specific heat of FeCl24H20, drawn from data of ref. [35,36]. Here the Schottky anomaly, having its maximum at 3K, could be clearly resolved from the lattice specific heat as well as from the sharp peak at 1K, which is due to a transition to antiferromagnetic order (lambda peak). 

Figure 6.20 Quick EXAFS and XRD measurements recorded during the temperature programmed reduction of copper in a Cu/Zn0/Al203 methanol synthesis catalyst. The disappearance and appearance of peaks with increasing temperature in the series of EXAFS spectra corresponds to the conversion of oxidic to metallic copper. The intensity of the relatively sharp peak around 9040 eV, indicative of Cu metal, clearly illustrates the kinetics of the reduction process, as does the intensity of the (111) reflection of Cu metal in the XRD spectra (adapted from Clausen 44J).

The fate of the bipyridinium radical cation in the mercaptan monolayer is not clear. The second reduction wave (Figure 3) possesses structure suggesting a precipitated phase similar sharp peaks are seen during the reductive precipitation of Cu.bpyMe2 ... 

Although site effects are not as prevalent in UV-vis absorption as they are in IR spectra, they do exist and manifest themselves sometimes very clearly in band systems that comprise sharp peaks. An example is the radical cation of all-trans-octatetraene whose first absorption band consists of multiple peaks that can be selectively bleached by highly monochromatic light. The site stmcture can become more evident in laser-induced fluorescence, where excitation of individual sites is possible down to the level of single molecules in favorable cases, but a discussion of this fascinating phenomenon is beyond the scope of this chapter. 

When CTAC is solubilized in micellar solution with cadmium Cd2+ ions, a better resolution in the excitonic peak with increasing CTAC concentration is observed. The sharp peak is more intense for low water content and for high CTAC concentration. This clearly shows a narrow size distribution. 

The strong peak shown at 0.88 eV for sample A in Fig. 5 is not consistent with the Lucovsky theory, nor, indeed, with most of the other theories that assume bound-state-to-band excitations. [Some recent calculations show the possibility of a sharp peak in the cross section if certain conditions are met, but it is not clear that these conditions are reasonable (Blow and Inkson, 1980).] One suggestion is that free-hole excitation above 0.88 eV causes a drastically reduced electron lifetime (Masut and Penchina, 1981) [i.e., larger denominator in the first term of Eq. (44)], but this interpretation is questionable because the... 

DOTAP ratios. SAXS data of complexes with 4>DOPE=0.26 and 0.70 clearly show the presence of two different structures. At DOpE=0.26 SAXS of the lamellar complex shows sharp peaks at f/um =0.099 A 1 and oo2=0198 A-1 resulting from the lamellar periodic structure (d =2%lqom=63A1 A), with DNA intercalated between cationic lipid analogous to the structure in DOPC/DOTAP-DNA complexes (Figure 10.1, left). 

---