Abstract: | Two nuclear hyperfine levels can cross when a quadrupole and magnetic interaction are combined. When the levels come close enough, interferences between two transitions can occur if coherence conditions are fulfilled. In this paper we discuss the possibility that coherence and interferences could occur if the zero fluctuations of an electromagnetic field in a crystal lattice would be anisotropic. This revised version was published online in August 2006 with corrections to the Cover Date. |