Showing papers by "University of Ioannina published in 1974"
TL;DR: In this article, it was shown that when the divalent cation impurity has an electronic configuration similar to the inert gases, no observable deviation from simple Debye theory exists and activation energy increases linearly with the ionic radius of the impurity.
62 citations
TL;DR: In this article, the exclusive kernel of a previously proposed integral equation (IE) is expressed in terms of DRM amplitudes in the central region and the |B6B5| relative normalization is fitted to four-prong NAL data.
19 citations
01 Jan 1974
16 citations
TL;DR: In this paper, the idea of local duality between generalized vector dominance and light cone algebra or parton model is applied to the propagator of vector currents and a set of sum rules reminiscent of the generalized first Weinberg sum rules but involving certain unknown parameters are derived.
13 citations
9 citations
TL;DR: In this paper, the thermoluminescence (TL) of marbles and limestones from various quarries in Greece has been described, and it had been hoped that features characteristic of each quarry would be found.
Abstract: THE thermoluminescence (TL) of marbles and limestones1–3 from various quarries in Greece4 has been described. It had been hoped that features characteristic of each quarry would be found. The glow curves of samples as taken from the quarry are called natural thermoluminescence curves (NTL). These curves did not allow any determination of origin, because in nearly every case only a single peak was obtained.
8 citations
TL;DR: In this paper, two series of samples of Mycenean and Minoan Pottery of well authenticated origin have been examined by Mossbauer Spectroscopy and the analysis of spectra taken at 77 K showed that parameters such as the quadrupole splitting and the total absorption area can be used for differentiating between the samples of the two series.
Abstract: Two series of samples of Mycenean and Minoan Pottery of well authenticated origin have been examined by Mossbauer Spectroscopy. The analysis of spectra taken at 77 K showed that parameters such as the quadrupole splitting and the total absorption area can be used for differentiating between the samples of the two series. The spectra show a dramatic increase of the ratio of the magnetic to total oxides, when the temperature is lowered from 4.2 to 1.4 K, suggesting a disintegration of the oxide particles. Comparison with results from modern pottery and pottery of intermediate ages shows that the degree of disintegration is a function of time. The possibility of using Mossbauer spectroscopy for dating ancient ceramics is discussed.
5 citations
TL;DR: Using SU(4) W and generalized vector dominance (GVD) as mentioned in this paper, the electromagnetic meson decays in terms of the pion form factor and U(3) is better in the constituent than in the current quark frame.
2 citations