Sternheimer parameters

There are several approximate methods often useful in understanding the trends in the quadrupole parameters in a related series of molecules containing the same quadrupolar nucleus. One. due to Townes and Dailey, is essentially a localized orbital approach, in which attention is focused on changes in the orbital populations of the atom containing the quadrupolar nucleus, and polarization of the core electrons (the so-called Sternheimer polarization factor) is assumed to vary negligibly from one molecule to another. In the case for example,... 

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