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[en] The h11/2 and h9/2 level systems have been studied experimentally and theoretically in 189Au. If multiplied by a constant scaling factor, the two systems display identical relative energy spacings. This is in agreement with particle-hole symmetry valid for triaxial odd-A rotors
[en] It is demonstrated that the atomic model previously shown to give a semi-quantitative account of the heat of formation of transition metal intermetallic compounds, can also offer a relatively simple interpretation of the isomer shift in metallic alloys. The two main terms in the isomer shift are due to (1) electronic charge transfer between more electropositive and more electronegative metal atoms and (2) the discontinuity in the electron density that exists at the boundary between dissimilar atoms if the atoms have similar charge distribution in both alloy and the pure metals. The electron density must become continuous at the cell boundary; this leads to a term in the isomer shift that usually, but not always, opposes the charge transfer term. In solid solutions there is an additional volume (size mismatch) contribution to the isomer shift which, however, is not as important as suggested by some other authors. In addition to experimental results obtained on the isomer shift solid solutions of Au as an impurity in transition metals hosts, we discuss results on Au-base alloys and gold intermetallic compounds. (orig.)
[en] This paper describes in some detail the application of the integrating counting technique to 197Au spectroscopy. In this method no pulse height discrimination is applied but the total detector current is measured
[en] Lifetimes of the low-lying excited states in the very neutron-deficient nucleus 175Au have been measured by the recoil-distance Doppler-shift method using γ-ray spectra obtained with the recoil-decay tagging technique. Transition quadrupole moments and reduced transition probabilities extracted for this odd-Z nucleus indicate the existence of three different shapes and the competition between collective and noncollective structures.