Analysis of the Spectra of Pd-Like Praseodymium and Neodymium (Pr XIV and Nd XV)

S. S. Churilov (1) , Alexander N. Ryabtsev (1) , Jean-François Wyart (2) , Wan-Ü. Lydia Tchang-Brillet (3) , Y. N. Joshi (4)

1 ISRAS - Institute of Spectroscopy, Russian Academy of Sciences
2 LAC - Laboratoire Aimé Cotton
3 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
4 Physics department, St Francis Xavier University, Antigonish

The spectra of palladium-like Pr¹³⁺ and Nd¹⁴⁺ ions excited in a laser-produced plasma source have been investigated in the 70 700 Å region. Almost all the energy levels of the 4d⁹5s, 4d⁹5p, 4d⁹4f, 4d⁹5d and 4d⁹5f configurations in Pr XIV and Nd XV as well as the energies of the 4d⁹6s levels in Pr XIV have been determined experimentally. One hundred seven spectral lines belonging to the 5s-5p, 5p-5d, 5d-5f, 4f-5d and 5p-6s transitions in Pr XIV and eighty five lines belonging to the 5s-5p, 5p-5d, 5d-5f and 4f-5d transitions in Nd XV have been classified for the first time. The present analysis is based on an accurate extrapolation of energy parameters in the Pd I isoelectronic sequence. The experimental level energies are described by Generalized Least Squares isoelectronic studies of 4d⁹5l configurations.

Domaines: Astrophysique [astro-ph]

S. S. Churilov, Alexander N. Ryabtsev, Jean-François Wyart, Wan-Ü. Lydia Tchang-Brillet, Y. N. Joshi. Analysis of the Spectra of Pd-Like Praseodymium and Neodymium (Pr XIV and Nd XV). Physica Scripta, 2005, 71, pp.589-598. ⟨10.1088/0031-8949/71/6/004⟩. ⟨hal-03785498⟩