Energy from chromium

Murphy and co-workers (119) have reported the transfer of energy from 3d to 4/electrons in LaA103 Cr Nd, and studied the fluorescent lifetimes of both the transition-metal and rare-earth ion. Their evidence for transfer was that neodymium fluorescence was excited when the sample was pumped in a region where only the chromium adsorbs. The series of compounds investigated was La1 A.NdArAlI >,Cr>,03. They observed that the intensity of the chromium fluorescence decreases rapidly with neodymium... 

According to the excitation energies reported in Table 12, the performance of the hybrid PBEO functional improves significantly on going from chromium to the heavier members of the MF6 series. Indeed, there is an... 

We indicated in our discussion of simple metals that the electronic specific heat at low temperatures is linear in temperature and proportional to the density of states at the Fermi energy. The density of states so obtained from the specific heat is shown in Fig. 20-9, and the correlation is apparent. Notice in particular the low value at four electrons per atom for Ti, Zr, and Hf, all of which occur in the hexagonal closc-packcd structure this corresponds to the dip we noted in the density of states in Fig. 20-8,a. Similarly the minimum at six electrons per atom corresponds to the minimum in the body-centered cubic density of states of Fig. 20-7, at the Fermi energy for chromium. 

All parameters necessary to estimate the Fermi energy from the density of states to the right in Fig, 20-11 arc given in the Solid State Table. Estimate the Fermi energy for chromium, The ntimber Z, of free electrons per atom can be written... 

When the rf energy corresponding to one of the five AP NMR frequencies is applied, the ESR signal from chromium is affected in such a way that its dispersion signal x decreases and the microwave absorption y" increases from their values in the absence of the NMR frequency. 

EXCITATION ENERGY TRANSFER CHROMIUM-CHROMIUM FROM THE CATION TO THE ANION IN //CR UREA 6//... 

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