Heavy-ion storage-ring quest for atomic lifetimes in Li+ and Be2+

Autor:	Alexander Wolf, E J Knystautas, Elmar Träbert, Gerald Gwinner
Rok vydání:	2003
Předmět:	Physics Metastability General Physics and Astronomy Orders of magnitude (data) Heavy ion Atomic physics Storage ring Ion
Zdroj:	Canadian Journal of Physics. 81:941-952
ISSN:	1208-6045 0008-4204
DOI:	10.1139/p03-073
Popis:	Decays of metastable levels in the He-like ions Li+ and Be2+ were studied at a heavy-ion storage ring. The lifetimes involved span five orders of magnitude (from 0.5 ms to 50 s) and thus test the performance envelope of the experimental technique. For the 1s2s3S1 level in Be2+ ions, our lifetime result of (1.80 ± 0.05) s agrees with accurate nonrelativistic and relativistic calculations. While theory in these cases is expected to be well developed, experience reflects on the capabilities of the experimental arrangement. The time-resolved observations reveal information on cross sections for collisional de-excitation. PACS Nos.: 32.70.Cs, 39.90.+d, 31.50.+w
Databáze:	OpenAIRE
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