D-count

Figure 5.24. Gamma-ray spectrum of preconcentrated river water after short irradiation. Irradiation time 5 min thermal-neutron flux 1 x 1013 n cm 3 s"1 decay time 3 d counting time 1000 s. Source [627]...

Table 4.2 summarizes the Lewis-like oxidation states, d count, and coordination numbers for low-spin compounds of all the normal-valent transition metals. While these represent only a subset of the empirically known species, the Lewis-like... 

Table 4.2. Lewis-like oxidation numbers (n07L), formal d count, metal electron configuration (eep, Chp) and minimum and maximum coordination numbers (ncs) for low-spin normal-valent compounds of group 6-11 transition metals...

Table 4.52. A synopsis of localized electronic structures for simple metallocenes in terms of MLX formulation, spin-state multiplicity, nonbonding d electrons (d count) and orbitals (nd), ordinary (2c/2e) and tu (3c/4e) bonds, and nominal sd" hybridization...

This self-dubb d Count some few years since became A Brother Mason in a borrowed name ... 

Figure 18 Calculated energy dif f erence curve between the tetragonal and orthorhombic forms of the 2-1-4 compound as a function of d-count. Most of the plot is chemically meaningless, but it is the part around the d9 count which is of most interest.

Dry weight, grams Counts in peak Counts in background Net counts, S.D. Counting time, min. 

D = (counts/time)(branching ratio)(detection efficiency)... 

Of the transition-metal metallofullerenes, the Sc-containing systems are of particular interest as they can be synthesised in the form of mono-, di-, tri- and even tetrametallofullerenes [25]. Among the possible transition-metal encapsulates, Sc species also have the advantage that the most common valencies - trivalent and divalent - have the simple initial-state d-counts of d° and d1. Thus, evidence for population of the Sc 3d shell is already a clear sign that one has moved away from the ionic trivalent paradigm seen in all cases so far (with the notable exception of Tm C82). 

Here Ers = Xiliixsjl where the freeon orbitals are summed over their electron numbers, d counts the number of doubly-occupied, freeon atomic orbitals and... 

Table 6. Calculated differential Coulomb binding energy shifts due to change of valence s and d count in Tia)...

This could not readily be understood if the d bands were merely sampling the changing potential at the Au site. The point, of course, is that the Au d bands are actively involved in the alloying, as shown by the decrease in d count deduced from the core level and Mossbauer measurements. With dilution of the Au, the d bands become increasingly narrow and in AuSn4 the peak separation has decreased to... 

Fig. 18 a, b. Computed energy difference curve between rutile and a-PbO2 structures as a function of d count a) Curve for rutile and a-PbO2 and b) Curve for the distorted variants MOO2 and p-ReO2 as shown in 17... 

At low light levels the major source of noise in the CID system is a combination of Johnson noise and shot noise from the first stage of the charge amplifier. The system noise and gain of our CID camera were evaluated using the mean-variance method (10). The system noise for a single readout is 800 electrons (rms) and the gain is set for 1350 electrons per A/D count. 

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