The quadrupole coupling constant, eQV,,/h, for ll1Cd probe nuclei in Cd,Mgl-, alloys (z = 0.0 to 1.0) is measured as a function of temperature and composition, using the time differential perturbed angular correlation technique. The observed temperature dependence of the electric field gradient (EFG), V,, can be described by a T3iz-relation for each of the compositions studied, except in the cases where phase transformations take place. From the measured concentration dependence of the EFG in the disordered h.c.p. phase of the alloy with lattice constants c and a, plots for the variation of a3(e&V,,/h) with c/a are made at different temperatures. These experimental results are discussed, using a theory of the EFG in metals, which predicts such a plot to belinear.Die Quadrupolkopplungskonstante e&V,,/h, fur lllCd-Sondenkerne in Cd,Mgl -,-Legierungen (5 = 0,O bis 1,0) wird als Funktion der Temperatur und Zusammensetzung gemessen, wobei die zeitdifferentielle Technik gestorter Winkelkorrelationen benutzt wird. Die beobachtete Temperaturabhangigkeit des elektrischen Feldgradienten (EFG) V,, la& sich durch eine T3lz-Abhangigkeit fur jede untersuchte Zusammensetzung beschreiben, ausgenommen die Fllle, wo Phaseniibergange stattfinden. Aus der gemessenen Konzentrationsabhkngigkeit des EFG in der fehlgeordneten h.d.p.-Phase der Legierung mit den Gitterkonstanten c und a werden Kurven fur die Anderung von a3(e& Vzz/h) iiber c/a bei unterschiedlichen Temperaturen aufgetragen. Die experimentellen Ergebnisse werden diskutiert, wobei eine Theorie des EFG in Metallen verwendet wird, die eine lineare Kurve vorhersagt. l )
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