Secular changes in the xenon and krypton abundances in the solar wind recorded in single lunar grains

Article Abstract:

An analysis of xenon and krypton abundances in individual grains of lunar soil reveals variations in the composition of solar wind. The enrichment of xenon in contrast to argon and the unchanged abundance of heavy noble gases on the Moon confirms the excess of easily ionizable elements in the solar chromosphere. The results of the study show that the selection effect arises from element-specific ionization times in the solar chromosphere.

Analysis, Observations, Solar wind, Krypton, Xenon, Lunar soil

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Collecting interstellar dust grains

Article Abstract:

Interstellar dust grains are classified as such due to the high speed at which the ion trails of dust particles enter the earth. Detectable meteors are produced whenever the Earth crosses the path of the interstellar particles. On the other hand, the particle's velocity is reduced whenever the Earth moves away from the stream. The possibility that the dust particles can survive atmospheric entry is computed using a mathematical model.

Models, Interstellar matter, Interstellar medium, Cosmic dust

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Magnetic grains in GaAs

Article Abstract:

Small quantities of microscopic ferromagnetic grains of gallium-manganese are deposited in the gallium arsenide semiconducting matrix using high energy manganese ions and thermal treatment. Unusually high magnetoresistance is observed in the doped semiconductors. Advantages of unique magnetic properties of the ferromagnetic-doped semiconductors such as spin superlattices are discussed.

Research, Usage, Semiconductors, Ferromagnetic materials, Gallium arsenide semiconductor devices, Gallium arsenide semiconductors, Impurity distribution in semiconductors

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