Optical absorption spectra of boron clusters Bn (n = 2–5) for application in nano scintillator – a time dependent density functional theory studyRajendra K. Shivade and Brahmananda ChakrabortyEur. Phys. J. B, 89 9 (2016) 198DOI: https://doi.org/10.1140/epjb/e2016-70341-x