Vibration-vibration

Spectral information available Vibrational Vibrational Vibrational combinations and... 

Mack J A, Mikulecky K and Wodtke A M 1997 Resonant vibration-vibration energy transfer between... 

Stephenson J C and Moore C B 1972 Temperature dependence of nearly resonant vibration-vibration energy transfer in COj mixtures J. Chem. Phys. 56 1295-308... 

Osgood R M Jr, Sackett P B and Javan A 1974 Measurement of vibrational-vibrational exchange rates for excited vibrational levels (2 v 4) in hydrogen fluoride J. Chem. Phys. 60 1464-80... 

Grabiner F R, Flynn G W and Ronn A M 1973 Vibration-vibration equilibration in laser excited CH3F and CH3F-X mixtures J. Chem. Phys. 59 2330-4... 

High axial vibration, vibration erratic (prime V or other drive belts Mismatched V-helts... 

Various sources publish data of permissible vibration levels for employees (usually as a graph of acceleration against frequency). These are designed to avoid injury and cannot be used as a guide to the degree of disturbance caused by vibration. Vibration caused by neighboring industrial premises when received at a residence as vibration (i.e. no noise implications) has been considered a nuisance when it is just perceptible. 

Systems involving more mass points are capable of more complex vibrations, since the vibrational modes may involve several to many atoms and all three dimensions are available for vibrational movements. Vibrations where primarily the distances along the bond axis between the involved atoms change during the vibration are called valence vibrations. Vibrations causing a deformation of a bond angle are referred to as deformation vibrations. Deformation movements can also rock , wag or twist a molecular (sub-) structure (Figure 1). 

IR emission spectroscopy makes use of the reciprocal effect of IR absorption spectroscopy. At temperatures above 0 °K, molecules undergo a number of vibrational, vibrational-rotational or purely rotational movements. The relaxation of these excited states leads to the emission of thermal radiation, primarily in the IR region. 

Engel, Y. M., and Levine, R. D. (1989), Vibration-Vibration Resonance Conditions in Intramolecular Classical Dynamics of Triatomic and Larger Molecules, Chem. Phys. Lett. 164, 270. 

Vibration Vibration can be a major disruption and destractive influence for any form of instrumentation. FTIR is a special case because the fundamental measurement is vibration sensitive. Care must be taken to ensure that the mirror drive, and associated optics and components are immune to vibration. Note that mirror mounts, and even detector mounts can be a source of vibrational interference. From a more basic standpoint, constant vibration can work components loose, and so the extensive use of a screw bonding adhesives, is strongly recommended. 

In all forms of Meotallsm there is ia evidence the phenomena of Mental Vibration. Vibration is not confined to the gross material substance of the universe, hut b equally in evidence in the Mind Stuff with which all space id filled. Mind 5tutf it the elementary material of which the great Cosmic World Brain is composed When one thinks, feels, or wills, there is manifest vibration just as truly as in ths vibration of the atom or the tuning-fork Each kind of thought, feeling or emotion has its own rate of vibration, or keynote. 

Vibrational Frequencies. The energies at which molecules vibrate. Vibrational frequencies correspond to the peaks in an infrared and Raman spectrum. 

Taylor, M. Camac 8c R.M. Feinberg, "Measurements of Vibration-Vibration Coupling in Gas Mixtures , Ibid (1967), pp 49-65... 

Basco and Norrish25 flash photolyzed C2N2 and BrCN in the presence of NO and observed vibrationally excited nitric oxide. They suggested that it was formed through near-resonance vibration-vibration energy exchange with CN radicals and/or in the photolysis of NCNO. 

For one thing, steam produced from hot-lime-softened water will have some amount of silicates. These silicates tend to deposit on the rotor blades of turbines, which use the motive steam as a source of energy. The silicate fouling of the turbine blades reduces the turbine s efficiency. But, more importantly, from an operator s point of view, the silicate deposits eventually break off of the blades. This unbalances the rotor. An unbalanced rotor is the fundamental cause of vibration, Vibrations lead to damage of the shaft bearings and seals. Eventually, vibrations will destroy the turbine s internal components. 

Method of feed screw vibrator screw vibrator vibrator... 

The importance of vibration-vibration exchange is now apparent in the results of the early experiments on HC1 and on hydroxyl (from H+03 - OHp+02) at pressures above 0.1 torr. These showed vibrational distributions that were nearly Boltzmann, but with shape parameters corresponding to temperatures of several thousand degrees, far greater than the translational temperatures. These distributions were samples taken after rotational relaxation and after the efficient vibration-vibration energy exchange... 

Equation (18) may be derived in a manner similar to that described above for vibration-vibration energy transfer, with the difference that the product of the squared matrix elements of the two vibrations concerned, appears in the expression for transition probability. Since both molecules require suitable orientation for vibrational exchange, for two diatomic molecules the steric factor is usually taken to be ( )2. If AE - 0 (exact resonance), eqn. (18) is no longer valid and the following equation may be employed... 

---