The molecular constants and potential energy curves of the Ca2 A 1Σ+u–X 1Σ+g system from laser induced fluorescence

From laser induced fluorescence of the Ca2 A–X system improved molecular constants and potential energy curves are given. A new technique for determining the standard error of molecular potentials is presented. The dissociation energies are De=1095±0.5 cm−1 for the X state and 3980±0.5 cm−1 for the A state which dissociates into the 1S and 1D states of the separated atoms due to an avoided curve crossing. Discrete and continuous Franck–Condon factors have been measured.