ROT-AXIS

This is a class of data types representing a rotation. 

This entity type defines a rotation around an axis by a certain angle. The axis is described by a point and a direction. The angle is positive for clockwise rotation viewed in the direction of the vector. 

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Rot(axis,theta,c) rotates vector c around axis by theta c=Rot(axis,theta,c-a)/sqrt(lambda)+[0.5,0.5,0.5] Outputlmage[x,y]=c... 

Figure 3. Comparison of normalized MM influence spectra for SD (left panel) and OKE (rightpanel) in room-temperature acetonitrile. The SD spectrum isfor a perturbation in the partial charges of a dipolar diatom in with Br2-like nonelectrostatic potential parameters. Both spectra are decomposed into rotational, translational and rot.-trans. cross correlation components. The imaginary-requency portions of the spectra are plotted along the negative real axis. The SD results arefrom Ref. and the OKE results from Ref.

Sgg (Model A). In this model, the hydrogen-bonded molecule of the SB region is seen as executing one free rotation about the H-bond axis. The two rotations about the axes perpendicular to the H-bond axis will be librational. rot-H-bondaxis Obtained tiom Eg. (2.109) using a frequency represented by a... 

Figure 2.10. The relative orientations of the principal axis system (PAS), rotor (ROT) and...

The three transitions between the three terms are referred to as zero-field transitions or the zero-field resonances. In an applied high-frequency field Bi cos rot, all three transitions are allowed. This follows immediately by computation of the transition matrix elements (g/UB/h)(Tu Bi S T > using Table 7.2 for example, the transition matrix element for the zero-field transition T -(- Tz (Fig. 7.5), the transition matrix element (Txl(BixSx+ BiySy+ Bi2S2) T2> is nonzero only for the y component. For this transition, Bi must thus have a component in the y direction. From Fig. 7.5, this becomes intuitively clear for this transition, aU the spins must process around the y axis. The other two zero-field transitions follow by cyclic permutations. 

Special TRIPLE spectra of P355 in an RC single crystal of Rb. sphaeroides R-26 for rotation about the unit cell z-axis, and in liquid (buffer/LDAO) RC solutions. (Microwave power 20 mW, RF field ca. 10 gauss (rot. frame) for each sideband, 10 kHz fm, 70 kHz deviation). For the shown crystal orientations X II p and y Bp all four sites in the unit cell are equivalent [5,18,19]. The x-axis is close to the long and y is close to the short diagonal of the crystal morphological rhombic cross section as indicated. (See also refs. [18,19].) For identification of the X- and y-axis, see text. 

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