Editing Rotational relaxation
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According to simple [[rotational diffusion]] theory, the relaxation time | According to simple [[rotational diffusion]] theory, the relaxation time | ||
for <math>c_1(t)</math> would be given by | for <math>c_1(t)</math> would be given by | ||
<math>\tau_1 = | <math>\tau_1 = 1/2D_\mathrm{rot}</math>, and the relaxation time for | ||
<math>c_2(t)</math> would be <math>\tau_2 = | <math>c_2(t)</math> would be <math>\tau_2 = 1/6D_\mathrm{rot}</math>. | ||
Therefore, <math>\tau_1= 3 \tau_2</math>. This ratio is actually lower in simulations, | Therefore, <math>\tau_1= 3 \tau_2</math>. This ratio is actually lower in simulations, | ||
and closer to <math>2</math>; the departure from a value of 3 signals rotation | and closer to <math>2</math>; the departure from a value of 3 signals rotation | ||
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| HH || H-H axis || <math>\tau_2=2.0</math>ps (H-H dipolar relaxation NMR) | | HH || H-H axis || <math>\tau_2=2.0</math>ps (H-H dipolar relaxation NMR) | ||
|- | |- | ||
| OH || O-H axis || <math>\tau_2=1.95</math>ps (< | | OH || O-H axis || <math>\tau_2=1.95</math>ps (<math>^{17}</math>O-H dipolar relaxation NMR) | ||
|- | |- | ||
| <math>\mu</math> || dipolar axis || not measurable, but related to bulk dielectric relaxation | | <math>\mu</math> || dipolar axis || not measurable, but related to bulk dielectric relaxation |