Muon Knight shift studies in single crystals of Zn and Cd

Abstract

Recently f i r s t resul ts have been reported on the muon Knight s h i f t in high pu r i t y (6N) spherical s ingle crys ta ls of Cd and Zn [ l ] . These measurements, using a stroboscopic ~SR-technique [2 ] , are extensions of e a r l i e r ~+ Knight s h i f t measurements in nontrans i t ion metals [3 ,4] in which the pos i t i ve muon is used as a "hydrogen" subs t i tu te in the study of i t s local e lec t ron ic s t ructure in a metal environment. Since the s o l u b i l i t y of hydrogen in these metals is general ly very small , no proton-NMR measurements have ever been performed in th is class of metals. To the extent that the mass d i f ference between the proton and the muon is neglected the local e lec t ron ic s t ructure of the proton and the muon are the same. Actua l ly isotope ef fects may be present 9 The metals Zn and Cd, close to the t r ans i t i on metal ser ies , have a more complicated e lec t ron ic s t ructure and a hcp crys ta l s t ructure g iv ing r ise to various an isot rop ic proper t ies . In the present cont r ibu t ion the old I l l and some new resul ts are reported.