About the Eötvös experiment and the hypercharge theory

A careful analysis of the linear correlation between the data of the Eötvös experiment and the baryon number per unit atomic mass shows (i) that it has a positive slope and approximately goes through the origin, and (ii) that the errors are so great that it can accomodate the weak equivalence principle of general relativity as well as the hypercharge theory of Fischbach et al., both for an attractive or a repulsive force.     

Eötvös bounds on couplings of fundamental parameters to gravity

The possible dependence of fundamental couplings and mass ratios on the gravitational potential has been bounded by comparing atomic clock frequencies over Earth's elliptical orbit. Here we evaluate bounds on such a dependence from E?tv?s-type experiments that test the weak equivalence principle, including previously neglected contributions from nuclear binding energy. We find that variations of fundamental parameters correlated with the gravitational potential are limited at 10(-8)-10(-9), an improvement of 2-3 orders of magnitude over atomic clock bounds.     

The Eötvös experiment,spatial isotropy,and generally covariant field theories of gravity

It has been suggested that the numerical value of the fine structure “constant” may in fact be variable, being determined by the distribution of matter in the universe. However, there is some reason to believe that this conjecture is not consistent with the observed structure independence of gravitationa acceleration and the test of spatial isotropy discussed by Drever and others. The purpose of this article is to discuss this idea within the framework of a classical, generally covariant field theory. The usual electromagnetic field equations are modified so that the value of the fine structure constant which one would determine from a local experiment is given by a scalar gravitational field. With these modified equations, a field theory of gravity in which the motion of free test particles is consistent with the observed structure independence of gravitational acceleration may be constructed in a straightforward way. However, it is shown that this theory must be ruled out by the experimental observations of spatial isotropy.     

Schrödinger's equation and special radial electric fields

Schrödinger's equation is exactly soluble if one considers a central potential of the type Ar²+Br−D/r provided D takes particular well chosen values.     

Mössbauer experiments with 57Fe between 1 and 0.08°K

Using a ³He/⁴He dilution refrigerator, the polarization of cobalt nuclei in iron was investigated by measuring the Mössbauer spectrum of ⁵⁷Fe down to 0.08°K. Good agreement between theory and experiments was obtained above 0.12°; below this temperature equilibrium difficulties prevented meaningful results.     

Source-free electromagnetic fields in the Einstein-Gödel universe

A metric containing a parameter (² = 1) has been derived which represents axially symmetric source-free electromagnetic fields in a static Einstein universe when is put equal to 1. The same metric represents the source-free electromagnetic fields in a Gödel rotating universe when is put equal to-1. Many known solutions are obtained as particular cases.     

Backscattering Mössbauer MIMOS II and XRF studies on tektites from different strewn fields

Room temperature ⁵⁷Fe Mössbauer spectroscopy has been used to obtain information on the redox and coordination of iron in tektites. A MIMOS II spectrometer in backscattering geometry has been used in the study, so that no sample preparation at all was required. X-ray fluorescence has been used to determine the composition of the tektites. Mössbauer spectra have been deconvoluted using three extended Voigt-based profiles to allow quantitative analysis of iron atoms valence and coordination. In all tektites, the Fe $^{2+ }$ sites have been distinguished in Fe with octahedral and tetrahedral coordination. The Fe $^{2+}$ octahedral sites show a region of isomer shift (IS) and quadrupole splitting (QS), IS $=$ 1.02–1.14 mm/s and QS $=$ 1.82–2.12 mm/s, relative to $\alpha $ -Fe. The Fe $^{2+ }$ tetrahedral sites show a region of hyperfine parameters of IS = 0.59–0.89 mm/s and QS = 1.14–1.60 mm/s. The Fe³⁺sites show IS = 0.11–0.33 mm/s and QS = 0.02–0.04 mm/s. The Fe³⁺/Fe²⁺ ratio was found to be 0.025–0.149.     

Kalb–Ramond fields and the CMBR

Cosmological implications on the polarization of the cosmic microwave background radiation, of a Kalb–Ramond field interacting with gauge fields and gravity as dictated by quantum consistency of heterotic string theory are surveyed. A parity violating augmentation going beyond the dictates of string theory is shown to lead to possible appearance of a B mode generated in the cosmic microwave background (CMB) in the post-last scattering epoch. This generation of the B mode of CMB appears to be dramatic when the augmentation is embedded within a Randall–Sundrum braneworld scenario of the first kind.