Electronic structure of atoms: atomic spectroscopy information system

Abstract

The article presents a Russian atomic spectroscopy, information system electronic structure of atoms (IS ESA) (http://grotrian.nsu.ru), and describes its main features and options to support research and training. The database contains over 234 000 records, great attention paid to experimental data and uniform filling of the database for all atomic numbers Z, including classified levels and transitions of rare earth and transuranic elements and their ions. Original means of visualization of scientific data in the form of spectrograms and Grotrian diagrams have been proposed. Presentation of spectral data in the form of interactive color charts facilitates understanding and analysis of properties of atomic systems. The use of the spectral data of the IS ESA together with its functionality is effective for solving various scientific problems and training of specialists.

Transition Probabilities, Oscillator Strengths and Line Strengths Result From Radiative Transitions

“…The lifetime results of Theodosiou [19] and Glukhov et al [18] are in good agreement with the experimental results [3,5]. The results of this study are in excellent agreement with the results of Çelik et al [9], Theodosiou, Glukhov et al [18], and [30,31], therefore, Table 1 shows only lifetimes calculated by Glukhov et al [18] for comparison. Both Theodosiou and Glukhov et al calculated lifetimes up to n < 11.…”

“…These figures illustrate a high level of agreement between calculated values and those taken from the NIST site. The lifetimes for both sets computed in this work show excellent agreement with the results of CAHS [21], FMP [18], WBEPMT, QDOT [19], RMBT [29], and [30,31]. 5.…”

Laser-induced breakdown spectroscopy monitoring of aluminum alloys laser cleaning process

“…Evaluation of the plasma temperature and the concentration of electrons obtained as a result of laser action on the treated surface was carried out by analyzing the relative intensity of spectral lines similar to the method presented in [17][18][19]. The recorded spectral signals correspond to the excited state of the substance (ion I), according to the data [20]. With nanosecond ablation processing in this energy range, the recorded spectral response corresponds to a low-temperature plasma with an electron temperature of about 0.4 eV and an electron concentration of about 10 13 -10 14 cm -3 .…”

IR lasing on atomic xenon with pumping by longitudinal pulse inductive discharge

“…When pure xenon was excited by a pulse longitudinal induc tive transformertype discharge, the lines described above, with wavelengths 904.5 nm and 979.9 nm representing trans itions 6p 2 [5/2] 2 → 6s 2 [3/2]°2 and 6p 2 [1/2] 1 → 6s 2 [3/2]°2 of xenon neutral atoms [21][22][23][24], were observed in the spec trum. The radiation spectrum is shown in figure 3.…”