Propagation of high-frequency radiation in an anisotropic medium can be described in terms of two normal modes with different polarizations and different absorption coefficients. We investigate the properties of the normal modes in a strongly magnetized hydrogen gas for conditions expected in atmospheres of isolated neutron stars. We use the Kramers-Kronig relations to obtain the polarizability...

The process of thermal neutron absorption in the coldworked Pd cathodes during electrolysis in NaOD/D2O solution under irradiation by Ultraweak Thermalized Neutron Field (UTNF) was studied. It was found that during deuterium loading the probability of thermal neutron absorption in a strained Pd is increased by a factor 8 compared to the unstrained (annealed) sample or sample where loading is no...

In gauge theory of gravity, there is direct coupling between the spin of a particle and gravitomagnetic field. In the surface of a neutron star or near black hole, the coupling energy between spin and gravitomagnetic field can be large and detectable. Precise measurement of the position of spectrum lines of the corresponding emission or absorption can help us to determine the gravitomagnetic fi...

more than 30 mineral elements have been found with different key functions in helping plants and animals to survive and live healthy. as a direct result, they have always attracted the attention of scientists. the quest is to find some efficient analytical and quantitative procedures in this study to determine some mineral and trace elements of iranian crocus sativus l. corms. several studies h...

Due to the large thermal neutron absorption cross section of 10B, B4C-Al composites have been used as neutron absorbing materials in nuclear industries, which can offer not only good neutron shielding performance but also excellent mechanical properties. The distribution of B4C particles affects the mechanical performance and efficiency of the thermal neutron absorption of the composite materia...

Recently Sanwal et al. (2002) reported the first clear detection of absorption features in an isolated neutron star, 1E1207.4-5209. Remarkably their spectral modeling demonstrates that the atmosphere cannot be Hydrogen. They speculated that the neutron star atmosphere is indicative of ionized Helium in an ultra-strong (∼ 1.5 × 10 G) magnetic field. We have applied our recently developed atomic ...