OBSERVATION OF CIRCULAR–METASTABLE DOUBLY EXCITED STATES OF BARIUM

Autor:	Jean Hare, L. Chen, Michel Gross, T. Bolzinger, G. Spiess, F. Roussel, M. Cheret
Rok vydání:	1991
Předmět:	Physics chemistry.chemical_element Statistical and Nonlinear Physics Barium Electron Condensed Matter Physics Autoionization chemistry Excited state Metastability Rydberg state Atomic physics Valence electron Adiabatic process
Zdroj:	Modern Physics Letters B. :1199-1202
ISSN:	1793-6640 0217-9849
DOI:	10.1142/s0217984991001465
Popis:	We report the observation of unusual doubly excited states of barium: Ba (5dj, 21c). One of the valence electrons of Ba is prepared in an oriented circular Rydberg state (n = 21, l = m = 20, denoted 21c) by the adiabatic crossed-fields method. The other electron is excited to a 6pj state which decays radiatively to a 5dj metastable level. The measured autoionization lifetime of Ba (5d5/2, 21c) is T ~ 1 μ s , whereas for Ba (5d3/2, 21c), τ is estimated to be longer than 400 μs. This very large difference of lifetimes between the fine-structure states of the inner electron has been analysed.
Databáze:	OpenAIRE
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