Transitions causes

The induced absorption band at 3 eV does not have any corresponding spectral feature in a(co), indicating that it is most probably due to an even parity state. Such a state would not show up in a(co) since the optical transition IAK - mAg is dipole forbidden. We relate the induced absorption bands to transfer of oscillator strength from the allowed 1AS-+1 (absorption band 1) to the forbidden 1 Ak - mAg transition, caused by the symmetry-breaking external electric field. A similar, smaller band is seen in EA at 3.5 eV, which is attributed to the kAg state. The kAg state has a weaker polarizability than the mAg, related to a weaker coupling to the lower 1 Bu state. 

The tilde over operator r here and below indicates that the operator is calculated in the EFA, as was done in [185, 186], This treatment ignores the influence of rotational transitions, caused by the anisotropic part of the interaction, on relative translational motion of colliding particles. Therefore f (.K , differs slightly from the true operator r(K . What... 

A hysteresis cycle in the molar susceptibility measurements has been observed for [Ni2(Medpt)2(N3)2(/r-N3)2] (883). This has been ascribed to a phase transition caused by an asymmetrization process of the rhombus-like centrosymmetric [Ni-(N3)2-Ni] core that occurs with falling temperature. The asymmetrization transition can be explained in terms of a second-order Jahn-Teller distortion, taking into account the local symmetry of the dinuclear [Ni-(N3)2-Ni] entity (D2h, rhombic symmetry) before the arrangement.2128... 

This transition causes x to be read on the input tape, places Fq on the top (right) of the pushdown store and transfers to state [e]. ... 

Explain how changing the solvent polarity can be used in certain circumstances to determine the nature of the transition causing an observed absorbance. 

To test this relation we evaluate cv(T) explicitly using Eq. (7). The results for fixed fi =450 MeV are displayed on the right panel of Fig. 1. The critical temperature is T c 0.40 A (T=0). For the energy gap we find Aq = 0.074 T2. It turns out that Eq. (14), evaluated with constant values of A and M, (dashed-dotted) is in almost perfect agreement with the numerical result (solid) up to T T c/2. The phase transition, causing the discontinuity of cr at T = T c, is of course outside the range of validity of Eq. (14). We also display cv for M = 0 (dashed). Since Aq vanishes in this case there is no exponential suppression,... 

Compare the energy transitions caused by infrared light absorption to those caused by UV-VIS light absorption. 

Fig. 1. Energy levels of nucleus with 7 = in an external magnetic field. Arrows denote transitions caused by rf field wavy line denotes net transitions due to spin-lattice relaxation.

The switching or memory phenomena induced by electric field application or photo irradiation have been studied on Mott insulators, charge ordered insulators, and N-I transition systems and were found to be fast phase transitions in general. For the former two systems, the phase transitions caused a pronounced change in reflectance and conductivity from insulating to metallic features. The third system also exhibited a change in conductivity and dielectric response connected with the transports of solitons and/or domain walls, dynamic dimerization, and... 

Whenever an electronic transition causes a large change in the geometry (bond lengths or angles) of the molecule, the Franck-Condon factors tend to display the characteristic "broad progression" shown below when considered for one initial-state vibrational level vi and various final-state vibrational levels vf ... 

If, then, the low-temperature phase is semimetallic, we cannot interpret the first-order change at 260 K as a Mott transition caused by a discontinuous change in the number n of current carriers that theory predicts a discontinuous... 

In NaxW03-yFy Doumerc (1978) observed a transition that has all the characteristics of an Anderson transition similar phenomena are observed in NaxTayW3 y03. The results are shown in Fig. 7.14. It is unlikely that this transition is generated by the overlap of two Hubbard bands with tails (Chapter 1, Section 4) this could only occur if it took place in an uncompensated alkali-metal impurity band, which seems inconsistent with the comparatively small electron mass. We think rather that in the tungsten (or tungsten-tantalum) 5d-band an Anderson transition caused by the random positions of Na (and F or Ta) atoms occurs. The apparent occurrence of amiD must, as explained elsewhere, indicate that a at the temperature of the experiments. Work below 100 K, to look for quantum interference effects, does not seem to have been carried out. 

The metal-insulator transition may perhaps be envisaged as similar to a band-crossing transition, caused by overlap between the Cf states. Since these are negatively charged, if the wave function is expressed as (1) (2)+W2) fc(l), where ij/a and jfb are both s-functions with different radii, then the larger radius could be considerable. We think that this may account for the small value of <7mill observed (cf. Section 4), the number of free electrons at the transition being small. 

The phase transitions, such as a phase separation of polymer solutions, a sol-gel transition, or a volume phase transition of gels, are always accompanied by conformation changes of polymers. Therefore, when the phase transitions are induced isothermally by external stimulation, the transitions cause efficient conformation changes. This contribution describes how such efficient stimuli-responsive polymer systems can be constructed. 

A submatrix element of the /c-transitions, caused by operators (4.12) or (4.13) and generally denoted as A k) for the transitions of type (25.24), not specifying a coupling scheme between shells, may be written as follows ... 

Fig. 5. Schematic diagram of coiled-coil periodicities in relation to the numbers of residues per turn, the sequence repeat length, and the number of helical turns per repeat. Transitions caused by the insertion of stutters are marked in green, and transitions caused by stammers in blue. Periodicities for which we found examples in...

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