EUV and soft X-ray photoelectron spectroscopy of isolated atoms and molecules using single-order laser high-harmonics at 42Â eV and 91Â eV

► Photoelectron spectroscopy using single-order laser high-harmonics is presented. ► Dielectric multilayer mirrors are used to isolate the 42 eV and 91 eV harmonics. ► The harmonics are characterized by photoelectron spectroscopy of Xe. ► Two-color ionization of He and time-resolved spectroscopy of Br2 are demonstrated.