Vibrational natural

All these lines have a vibrational nature as they stay sharp even at high temperatures and as they shift towards low energy when temperature increases. This shift is only a few cm"1 when the temperature increases from 5 K to room temperature. For instance the line observed at 2315.6 cm"1 at 5 K in InP, shown in Fig. 18, shifts down to 2312.8 cm"1 at room temperature. [Pg.503]

IR spectroscopy, one of the few surface analytical techniques not requiring a vacuum, provides a large amount of molecular information. The absorption versus frequency characteristics are obtained when a beam of IR radiation is transmitted through a specimen. IR is absorbed when a dipole vibrates naturally at the same frequency as the absorber, and the pattern of vibration is unique for a given molecule. Therefore, the components or groups of atoms that are absorbed into the IR at specific frequencies can be determined, allowing identification of the molecular structure. [Pg.18]

The degree of freedom orthogonal to the surface is of vibrational nature. If the electronic structure of the surface does not k affect the movement of the molecule, the 2 degrees of freedom parallel to the surface will be translational and the adsorbed molecule will behave as a two-dimensional gas. However, as a... [Pg.38]

Since there is not an overabundance of experimental data, this was originally interpreted [126] as a rather weak dependence compared to that in Figure 3.22. However, a reanalysis reveals that t]v > 1 is in better agreement with the limited experimental data [248]. A high t)v is consistent with the exit channel (vibrational) nature of the barrier. [Pg.205]

As one might expect, various spectroscopies, especially electronic spectroscopy and resonance Raman spectroscopy, can provide detailed information about the electronic and vibrational nature of an excited state. Conventional... [Pg.285]

Y most probably has coexisting nuclear shapes with a well developed rotational band on the 495 keV level and other levels which seem to be rather of vibrational nature. [Pg.210]

At low energy, the ions excitation energy is mostly of a vibrational nature [20] because the interaction time between an ion with mass 200 Da at an energy of 30 eV with a target of a few angstroms is about 10 14 s, corresponding approximately to the bonds vibration period. [Pg.199]

The motions that are analyzed by colorimetry and photometry are no longer of rotational or vibrational nature as was shown for all previous spectral analyses. The motions analyzed at the visible and ultraviolet spectral regions are specific for each atom or chemical group. In order to understand the nature of these motions, it is important to understand the structure of the atom. [Pg.132]

Natrolite, applications Natrolite, ion exchange Natrolite, lattice vibrations Natural zeolites, Antarctica Natural zeolites applications PL-2... [Pg.422]

Wright, R.H. and Brand, J.M., "Correlation of Ant Alarm Pheromone Activity with Molecular Vibration." Nature, 1972, 225-226. [Pg.140]

The absorption versus frequency characteristics of light transmitted through a specimen irradiated with a beam of infrared radiation provides a fingerprint of molecular structure. Infrared radiation is absorbed when a dipole vibrates naturally at the same frequency in the absorber. The pattern of vibrations is unique for a given molecule, and the intensity of absorption is related to the quantity of absorber. In the IR region, each group has several... [Pg.195]

According to the paper [14] the process vibration nature is diseovered. This fact corroborates by IR spectroscopic investigations of nanostructures aqueous soles. Self-organization processes in media and compositions can be compared with the processes of crystalline phase origin and growth. At the same time, the growth can be one-, two- and three-dimensional. For such processes Avrami... [Pg.205]

The implicit assumption used in the development of the classical theory is that both the quantities and Aq should remain independent of the state of orientation of a system, as long as the vibrational nature of the submolecular group under observation is not affected much by the orientation process. By substituting eqns [15], [16], [20], and [21] to eqn [18], one obtains... [Pg.775]

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