Spectroscopy of ionized atoms for astrophysics and nanotechnology

Two relatively distant areas of application of the spectroscopy of ionized atoms was reported. The atmospheres of peculiar magnetic stars and the development of efficient optical lithography sources in the far vacuum ultraviolet (VUV) domain was also investigated. Moving to the extreme VUV range will allow bringing the spatial resolution of optical lithograph to 10 nm, which will result in a new leap in the development of microelectronics to nanoelectronics. An investigation of NdIII spectrum was performed with the use of the spectrum of the HD 217522 Ap star in the visible range. This star has a relatively low magnetic field and therefore, the line profiles in its spectrum are hardly distorted by the Zeeman splitting and their wavelengths in the visible range are measured with high precision. An analysis of the very complicated spectrum of EuIII is critical to the investigation of stellar atmospheres because europium is the most abundant in the atmospheres of hot Ap stars.