Radiative Transitions between the \({4D^{10}5p^2(^3P_j)nl}\) and \({4D^{10}5s5p(^3P_1^o)nl}\) Autoionizing States of in Atom in Collisions of Slow Electrons with in\(^{+}\) Ions

• Published in: arXiv.org 2009-11
• Main Authors: Gomonai, G M, Imre, A I, Ovcharenko, E V, Hutych, Yu I
• Format: Article
• Language: English
• Subjects: Configuration interaction; Cross-sections; Electron beams; Electrons; Excitation; Ion beams; Line spectra; Satellites
• ISSN: 2331-8422

The radiative transitions between the \(4d^{10}5p^2(^3P_{0,1,2})nl\) and {\(4d^{10}5s5p({}^3P_1^o)nl\) autoionizing} states of an indium atom that represent dielectronic satellites of the \(4d^{10}5p^2 {}^3P_0 \to 4d^{10}5s5p {}^3P_1\) (\(\lambda =171.7\) nm), \(4d^{10}5p^2 {}^3P_1 \to 4d^{10}5s5p {}^3P_1\) (\(\lambda =166.7\) nm), and \(4d^{10}5p^2 {}^3P_2 \to 4d^{10}5s5p {}^3P_1\) (\(\lambda =160.7\) nm) spectral lines of an In\(^{+}\) ion have been observed for the first time. The energy dependences of the effective excitation cross sections of dielectronic satellites, as well as near-threshold regions of these spectral lines, were investigated in the range of electron energies 9\(\div \)15 eV with the help of the spectroscopic method using crossed beams of electrons and In\(^{+}\) ions. The absolute excitation cross sections of dielectronic satellites amount to \((0.7\div 2)\times 10^{-16}\) cm\(^{2}\) and are of the same order of magnitude as the effective excitation cross sections of the corresponding ionic lines. It is found that a considerable increase of the probability of radiation decay of the \(4d^{10}5p^2(^3P_{0,1,2})nl\) autoionizing states of the In atom is related to strong relativistic and correlation effects, in particular to the configuration interaction of the \(5p^2nl\) levels both with one another and with the levels of the \(5s5dnl\) and \(4d^95s^25p^2\) configurations.