Nuclear Quadrupole Interactions Studied by Time Differential Perturbed Angular Correlations of y-Rays *
نویسنده
چکیده
This paper gives an elementary introduction to time differential perturbed angular correlation of y-rays emitted from excited nuclei with particular reference to nuclear quadrupole interactions. We start with a comparison to other techniques such as nuclear quadrupole resonance and the Mössbauer effect, quote all necessary formulae, describe a typical spectrometer, list suitable isotopes, and finally give some examples for modern applications.
منابع مشابه
Cd Nuclear Quadrupole Interaction in CdCl 2 and its Monohydrate
The nuclear quadrupole interaction (NQI) in layered transition metal dichalcogenides usually decreases linearly with increasing temperature [1]. This behaviour was attributed to anisotropic lattice vibrations and is the two-dimensional analog of the Tpower law in three dimensions [2], In order to investigate the origin of this linear power law further we choose another layered compound, namely ...
متن کاملOxygen Diffusion in YBa
The oxygen diffusion in Y B a X u j O ^ , , was studied between 300 K and 1273 K in flowing oxygen by monitoring the 1 3 Ba(EC) Cs nuclear quadrupole interaction by time differential perturbed angular correlation. The data are analyzed in a model of two different nearest neighbour oxygen configurations and yield hopping rates, the energy barrier and the difference in free enthalpy between both ...
متن کاملNuclear quadrupole interaction at Sc in the anatase and rutile modifications of TiO2: Time- differential perturbed-angular-correlation measurements and ab initio calculations
The nuclear quadrupole interaction of the first excited I=1 state of Sc in the anatase and rutile modifications of bulk TiO2 was determined by time-differential perturbed-angular correlation of rays. New LaBr3 Ce scintillators with excellent energy resolution allowed us to separate the 68 and 78 keV lines of the cascade. For anatase, an almost axially symmetric electric field gradient EFG with ...
متن کاملAtom movement in In3La studied via nuclear quadrupole relaxation.
Jump frequencies of Cd tracer atoms in In3La were measured via nuclear quadrupole relaxation caused by stochastic reorientation of the electric field gradient using the method of perturbed angular correlation of gamma rays. Activation enthalpies of 0.53(1) and 0.81(1) eV were found at the two phase boundaries, which differ in composition by only about 0.1 at. %. The jump frequency was found to ...
متن کاملThe Nuclear Quadrupole Interaction of Hg-Cysteine
The nuclear quadrupole interaction of 1 9 9 m Hg in Hg-cysteine and Hg-tert-butyl mercaptide was determined at room temperature by perturbed angular correlations. The dramatic difference in the interaction strength between both compounds is a result of the two-fold and four-fold sulfur coordination, respectively. Moreover, we compared the preparation of Hg-cysteine using a Hg: cysteine ratio of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2013