2.1 $\mu {\cal SR}$ Techniques

For detailed accounts of the technique, the reader is referred to the book of Schenck[73], the review article of Cox[74], and the recent review of Brewer[75]. The recently published book of Schatz and Weidinger[76] also has some elementary discussion of $\mu {\cal SR}$. One should be aware that description of $\mu {\cal SR}$ in the recent book Science of Fullerenes and Carbon Nanotubes[4] is incorrect. Excellent discussions of specific technical aspects of $\mu {\cal SR}$can be found in the following theses: for transverse field, the thesis of Riseman[77]; for general technical details those of Chow[78] and Luke[79]; and for a thorough discussion of the statistical details of $\mu {\cal SR}$ and of possible distortions in $\mu {\cal SR}$ spectra, that of Garner[80]