ISSN:
1572-9540
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract The interaction of dilute181Ta in Ta with interstitial oxygen has been investigated via the γ-γ TDPAC-technique applied to the 482 keV state in181Ta. The trapping of Oxygen leading to a quadrupole interaction frequency νQ=580(5) MHz with an asymmetry parameter of η-0.37 (1) has been observed after melting the radioactive parent isotope181Hf with Ta. The temperature dependence of the quadrupole interaction frequency between 17 K and 293 K was found to be very weak whereas η varied by about 10%. In a single crystal experiment the orientation of the three principal axes of the electric field gradient leading to νQ was determined. The Vzz-axis points in 〈110〉, the Vyy-axis in 〈100〉 and the Vxx-axis in 〈110〉 direction. These results can be understood in the charge cloud model, suggested by Wrede et al. /1/ for a similar situation found in the HfNb system.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF02394464
