Photoionization of ions of the nitrogen isoelectronic sequence: experiment and theory for F2+and Ne3+

Autor: Alfred S. Schlachter, Erik D. Emmons, John D. Bozek, Bruce Rude, Brendan M. McLaughlin, M. F. Gharaibeh, Aaron Covington, R. A. Phaneuf, S. Canton, A. Aguilar, Ignacio Alvarez, G. Ackerman, G. Hinojosa, Carmen Cisneros
Rok vydání: 2005
Předmět:
Zdroj: Journal of Physics B: Atomic, Molecular and Optical Physics. 38:343-361
ISSN: 1361-6455
0953-4075
Popis: Absolute photoionization measurements are reported for admixtures of the ground and metastable states of F2+ from 56.3 eV to 75.6 eV, and of Ne3+ from 89.3 eV to 113.8 eV. The 4So ground-state and the 2Do and 2Po metastable-state fractions present in the primary ion beams were estimated from photoion yield measurements near their respective threshold energies. Most of the observed resonance structure has been spectroscopically assigned. The measurements are compared with new R-matrix theoretical calculations and with those in the TOPbase astrophysical database. The systematic behaviour of the quantum-defect parameter is analysed as a function of the nuclear charge for four Rydberg series observed in both species, and compared to published data for O+ and N.
Databáze: OpenAIRE