Human population throughout the world is surrounded by an invisible continuously increasing web of radiation, originating from both natural and non-natural sources. Radiation is of two types: ionizing and non-ionizing depending upon their energy. The exposure to radiation has increased many folds in the recent years with the invention and launch of many electromagnetic devices. Exposure to ionizing radiations has been found to cause severe abnormalities in human beings such as DNA damage, cancer, infertility, electro-hypersensitivity, etc. which however is of different intensity depending upon the age group of human beings, with children and fetus being the maximum sufferers because of immature immune system and also various other cells in their body are still at the stage of division and differentiation. Present study has been aimed to investigate a generalized preliminary idea of various health related complications caused by ionizing radiations to human beings with special emphasis to fetus and children.

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A systematic variation in the density of states (DOS) of a substrate with respect to the chemisorption of hydrogen on transition metals using the composite Anderson-Newns model is investigated for different coverages. The substrate is a one-dimensional periodically arranged chain of atoms. A comparison between the change in DOS using semi-elliptical weighted DOS and triangular weighted DOS is also made for non-magnetic and magnetic cases. The coverage dependence shows a discerning behaviour on the formation of bonding and antibonding peaks. As the coverage increases, the bonding and antibonding peaks are found to shift towards higher energies and at the same time the relative height of the peaks increases, that clearly shows, at which coverage more chemisorption is likely to take place.

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