Electric quadrupole transitions in Ni XVIII

¹ Departamento de Química Física, Universidad de Valladolid, 47011 Valladolid, Spain
² Instytut Fizyki, Uniwersytet Mikołaja Kopernika, Grudziądzka 5, 87-100 Toruń, Poland
³ MPI für Astrophysik, P.O. Box 1523, D-85740 Garching, Germany

Send offprint request to: E. Charro

Received: 3 May 2000
Accepted: 26 July 2000

Abstract

Relativistic Quantum Defect Orbital (RQDO) calculations have been performed in the LS coupling scheme on electric quadrupole (E2) transitions between levels belonging to several astrophysically important configurations of Ni XVIII. A number of line strengths are reported and compared with the ones found in the literature. A good agreement with the comparative data as well as the expected systematic behaviour of the RQDO line strengths along the spectral series confirms earlier conclusions about the quality of the RQDO wavefunctions.