An equation of motion phonon method, developed for even-even nuclear systems, is extended to odd nuclei and applied to A = 17 isobars. A calculation using a chiral potential is carried out in a space encompassing up to two phonons and, under some simplifying assumptions, three phonons.
The low and high energy spectroscopic properties of 17O and 17F are thoroughly explored. The impact of the different phonon components on spectrum, transitions and dipole cross sections is discussed.