Related Experiment Video
Updated: May 3, 2026

Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
Observation of 2p3d(1Po)→1s3d(1De) radiative transition in He-like Si, S, and Cl ions
S Kasthurirangan1, J K Saha2, A N Agnihotri3
1Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India and Department of Physics, Institute of Chemical Technology, Mumbai 400019, India.
Abstract:
We present an experimental determination of the 2p3d(1Po)→1s3d(1De) x-ray line emitted from He-like Si, S, and Cl projectile ions, excited in collisions with thin carbon foils, using a high-resolution bent-crystal spectrometer. A good agreement between the observation and state-of-the-art relativistic calculations using the multiconfiguration Dirac-Fock formalism including the Breit interaction and QED effects implies the dominance of fluorescent decay over the autoionization process for the 2p3d(^{1}P^{o}) state of He-like heavy ions. This is the first observation of the fluorescence-active doubly excited states in He-like Si, S, and Cl ions.
More Related Videos
11:14Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
Published on: May 28, 2016
09:40Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
Published on: February 14, 2014
Related Concept Videos
Electron Configurations
The relative energies of the subshells determine the order in which atomic orbitals are filled (1s, 2s, 2p, 3s, 3p,...
Deactivation Processes: Jablonski Diagram
Hybridization of Atomic Orbitals II
Periodic Classification of the Elements
UV–Vis Spectroscopy: Molecular Electronic Transitions
The Aufbau Principle and Hund's Rule