Showing papers by "David A. Case published in 1978"
TL;DR: In this article, an explicit and general treatment for the intensity and polarization of resonance fluorescence from molecules produced in inelastic or reactive collisions was given for the rotational angular momentum distribution.
Abstract: Inelastic or reactive collisions typically produce an anisotropic distribution of rotational angular momentum. An explicit and general treatment is given for the intensity and polarization of resonance fluorescence from molecules produced in such processes. Both classical and quantum results are expressed in terms of bipolar harmonics and state multipoles formed from linear combinations of density matrix elements. The treatment provides an inversion procedure for determining moments of the rotational angular momentum distribution ; twelve independent moments can be obtained. The combinations of angular momentum operators involved are even in eight of these moments and odd in four, with respect to reflection in a plane containing the initial and final relative velocity vectors. Measurements of the even moments require linearly polarized excitation and fluorescence, whereas measurements of the odd moments require circularly polarized excitation. The requisite experimental geometry and other practical aspect...
189 citations
TL;DR: The binding of carbon monoxide to myoglobin and hemoglobin is examined to determine the origin of the deviation of the FeCO geometry from that found in model systems, and possible distortions due to protein-ligand interactions are analyzed.
32 citations