High-resolution spectroscopy of H,C,N + : I. Rotationally resolved vibrational bands of HCN + and HNC +

Ro-vibrational spectra of the open-shell linear cations HCN + (X̃ 2 Π) and HNC + (X̃ 2 Σ + ) are measured with leak-out spectroscopy in cryogenic 22-pole ion traps.