DOUBLE RYDBERG STATES IN STABILIZED TRIPLE CAPTURE IN BARE IONS (Z=6-10) ON RARE-GAS TARGET COLLISIONS

Citation
J. Bernard et al., DOUBLE RYDBERG STATES IN STABILIZED TRIPLE CAPTURE IN BARE IONS (Z=6-10) ON RARE-GAS TARGET COLLISIONS, Physica scripta. T, T73, 1997, pp. 190-192
Citations number
8
Categorie Soggetti
Physics
Journal title
ISSN journal
02811847
Volume
T73
Year of publication
1997
Pages
190 - 192
Database
ISI
SICI code
0281-1847(1997)T73:<190:DRSIST>2.0.ZU;2-H
Abstract
We report converging evidence from two different coincidence experimen ts of the formation of triply excited states C3+(2, n, n') and Ne7+(3, n, n') with two n, n' (n and n' much greater than 3) Rydberg electron s. They are formed by triple electron capture in collision of C6+ and Ne10+ bare ions with Ar at few keV. This detailed study was triggered by measurements of surprisingly large cross sections of stabilized tri ple electron capture (STC) for which a full radiative decay leaves the three electrons bound to the projectile. Both the energy gains and th e visible photon spectra support the interpretation in term of a large population of triply excited double Rydberg states among which some s tates decay without autoionization. For both systems, possible populat ion mechanisms are discussed in term of purely atomic mechanisms occur ring in the post collisional evolution of the quasi symmetrical triply excited states initially populated by the collision.