Spectroscopic amplitude

Parameter s. two-particle spectroscopic amplitude B jij2J) and the normalization factor D" are ... 

Cross sections of two neutron pickup reaction (p,t) are from [76Oe02] the parameter e, two-particle spectroscopic amplitude B j j2J) and the normalization factor D are from another... 

Technology developments are revolutionizing the spectroscopic capabilities at THz frequencies. While no one teclmique is ideal for all applications, both CW and pulsed spectrometers operating at or near the fiindamental limits imposed by quantum mechanics are now within reach. Compact, all-solid-state implementations will soon allow such spectrometers to move out of the laboratory and into a wealth of field and remote-sensing applications. From the study of the rotational motions of light molecules to the large-amplitude vibrations of... 

In the second broad class of spectroscopy, the electromagnetic radiation undergoes a change in amplitude, phase angle, polarization, or direction of propagation as a result of its refraction, reflection, scattering, diffraction, or dispersion by the sample. Several representative spectroscopic techniques are listed in Table 10.2. 

To prepare EPR samples of proteins at a fixed redox potential requires a relatively simple setup schematically outlined in Figure 13.3. Because an EPR sample has a volume of 100-200 pL, we need circa 1.5 mL of anaerobic (cf. Chapter 3, Section 3.5) protein solution to collect data for a ten-point amplitude versus potential graph. The protein concentration may be significantly lower than that of a sample for spectroscopic analysis because we are interested only in the relative EPR amplitude for each sample recorded under conditions that maximize signal-to-noise ratio a single 200 pL EPR... 

A particularly useful probe of remote-substituent influences is provided by optical rotatory dispersion (ORD),106 the frequency-dependent optical activity of chiral molecules. The quantum-mechanical theory of optical activity, as developed by Rosenfeld,107 establishes that the rotatory strength R0k ol a o —> k spectroscopic transition is proportional to the scalar product of electric dipole (/lei) and magnetic dipole (m,rag) transition amplitudes,... 

Vibrational amplitude effects for diatomic molecules can be straightforwardly calculated from spectroscopic data. Mean amplitudes and mean square amplitudes for diatomics are expressed in Equations 12.8a and 12.8b (see, e.g. Levine 1975)... 

Disregarding the different roles of the H-bond in the two cases, however, there is the same general correspondence of the spectroscopic behaviour for both the yXH and rXH bands, namely as the amplitude (and possibly anharmonicity) of the vibration is increased the frequency of the absorption band is lowered and its breadth enhanced. 

The response of ion-containing ethylene-methacrylic add copolymers has also been investigated 306). The strain amplitude of the samples was 2% and the period of external stress was 50,000microseconds. Changes in the dichroic ratio of the 2673 cm "1 band were observed as a function of strain in times as short as 200 microseconds. Other spectroscopic changes were observed but not interpreted in terms of structural changes. 

PHASE AND AMPLITUDE IMAGING OF EVOLVING WAVEPACKETS BY SPECTROSCOPIC MEANS... 

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