A study of radiation defects in solids by means of Mössbauer spectroscopy

Atomic charges in RBa2Cu4O8lattices, determined by comparison of experimental and calculated nuclear quadrupole interaction parameters

“…Figure 3(b) shows the points for the same sites in the diagram showing C(Cu) versus V zz . It is seen that the points are close to the straight line (8) when V zz is calculated using model (A1), whereas in the case of calculation using model (B1) both of the points considerably deviate from the straight line (8). This seems to confirm the validity of A-type models.…”

“…It can certainly be described in terms of the point charge model in a rough approximation only. Some additional problems may arise when account is taken of post-effects of β-decay of 67 Cu and electron capture by 67 Ga, producing the 67 Zn Mössbauer probe [8]. In this connection, it would be reasonable to compare our data with the results of quantum EFG calculations for the same compounds [9][10][11][12][13], which may be, in principle, more accurate and informative than the point charge approximation.…”

Investigations of the Quadrupole Interactions in the CuO Cation Sites by Means of the57Fe3+ and57mFe3+ M�ssbauer Probes

“…However, the analysis of numereous experimental data on the emission Mo È ssbauer spectra has shown that the effect of electron capture in 57 Co on the electron state and on the local environment of the 57m Fe daughter atom is hardly possible in oxides [12]. In this connection, other explanations should be searched for the difference in the structure of the emission and absorption Mo È ssbauer spectra of the iron impurity in CuO.…”

Moessbauer spectroscopy

“…Numerous Mdssbauer biological reviews have appeared in the literature including ones on hemes and hemoproteins (201,202,226), peptides and proteins (81), and iron porphyrins (273). Two good general reviews on metallurgy have appeared (100, 153) as well as reviews on radiation defects (281), amorphous magnetic rare earth alloys (48), backscattering applications in metallurgy (259), and impurity host force constant changes (123). The aspects of mineralogy which have been reviewed are silicate minerals (18) and thermal and radiation effects on minerals (68).…”