Electron affinity of selenium measured by photodetachment microscopy

Isotope shift on the chlorine electron affinity revisited by an MCHF/CI approach

“…This observation is supported by the larger impact of the core relaxation on the S sms than on the energy in valence MR-I models (see Table 3). Fitting the eight last points based on the MRT model of Cl − (see Tables 5), (25) suggests that, down to an energy of −459.9052 E h , the variational principle is not violated within the limits of our model. Table 6 gives the extrapolated energies and S sms of the Cl − and the resulting ∆S sms values corresponding to each open-core CI calculation performed on Cl (see Table 5).…”

“…In combination with improved methods for the measurement of the photoelectron kinetic energies such as photodetachment microscopy [21] and slow-electron velocity-map imaging [22], the technique of laser photodetachment at threshold represents the most precise way of determining photodetachment thresholds experimentally [23]. Amongst the recent applications of photodetachment microscopy, let us cite the first experiment realized in phosphorus [24] with the excitation of the parent neutral atom out of the fundamental spectral term, and the measurement of the electron affinity of selenium with an accuracy of 1 µeV [25] . The possibility of applying the tunable laser photodetachment spectroscopy to the measurement of the isotope shift on the electron affinity has been demonstrated for the first time by Berzinsh et al [26] for the 35,37 Cl isotopes.…”

Accurate Electron Affinity of Iron and Fine Structures of Negative Iron ions

“…On the other side, the accuracy of experimental EA value for some transition metal elements and main group elements have been steadily improved to 0.01–0.05 meV293031. The EA uncertainty by s-wave photodetachment even goes down to 1 μeV level by using the laser photodetachment microscopy3233343536. Most of the accurate EA values for transitional metals, such as EA(Cu) = 1235.78(4) meV37, were obtained by the laser photodetachment threshold (LPT) method38.…”

Measurement of electron affinity of atomic lutetium via the cryo-SEVI Method

“…The influences of electron correlation effects and relativistic effects add much more difficulties in calculations for heavy elements, especially for lanthanides due to the partially filled d-or f-type orbitals [2,3]. Thus it is indispensable to conduct experiments to test the validity of computational approximations [1][2][3][4][5][6].…”

“…These cause very congested spectra which cannot be well resolved by traditional methods. Moreover, the theoretical predictions of electronic structures and binding energies for lanthanides still remain challenging [1][2][3][4][5][6].…”