The paper is organized as follows. Our theoretical approach is outlined in Sec. II where we describe details of simulations of F1s X-ray absorption (XA), F1s nonresonant X-ray emission and F1s RIXS. Sec. III collects results of our calculations of XA, XE and RIXS accompanied by the comparison with the experimental data. Analysis of the role of nuclear dynamics is presented in Sec. III. Our finding are summarized in Sec. IV. The atomic units are used through the manuscript unless otherwise stated.