Spectral electron energy map of electron impact induced emission of nitrogen J. Blaško, J. Országh, B. Stachová and Š. Matejčík Eur. Phys. J. D, 77 2 (2023) 22 Published online: 08 February 2023 DOI: 10.1140/epjd/s10053-023-00602-y