Journalartikel

Jahr der Veröffentlichung: 2004

Seiten: L103-L109

Zeitschrift: Journal of Physics B: Atomic, Molecular and Optical Physics

Bandnummer: 37

Heftnummer: 5

ISSN: 0953-4075

eISSN: 1361-6455

DOI Link: https://doi.org/10.1088/0953-4075/37/5/L03

Verlag: IOP Publishing

Abstract: 
Lifetimes for K-shell vacancy states in atomic carbon have been determined by measurement of the natural linewidth of the 1s --> 2p photoexcited states of C+ ions. The K-shell vacancy states produced by photoionization of atomic carbon are identical to those produced by 1s --> 2p photoexcitation of a C+ ion: 1s2S(2) 2p(2) D-2, P-2, and S-2 autoionizing states occur in both cases. These vacancy states stabilize by emission of an electron to produce C2+ ions. Measurements are reported for the lifetime of the 1s2s(2) 2p(2) D-2, P-2 and S-2 autoionizing states of C+: 6.3 +/- 0.9 fs, 11.2 +/- 1.1 fs and 5.9 +/- 1.3 fs respectively. Knowledge of such lifetimes is important for comparative studies of the lifetimes of K-shell vacancies in carbon-containing molecules, benchmarking theory, and interpreting satellite x-ray spectra from astrophysical sources such as x-ray binaries. Absolute cross sections were measured for both ground-state and metastable-state ions providing a stringent test of state-of-the-art theoretical calculations.

Harvard-Zitierstil: Schlachter, A., Sant'Anna, M., Covington, A., Aguilar, A., Gharaibeh, M., Emmons, E., et al. (2004) Lifetime of a K-shell vacancy in atomic carbon created by 1s→2p photoexcitation of C⁺, Journal of Physics B: Atomic, Molecular and Optical Physics, 37(5), pp. L103-L109. https://doi.org/10.1088/0953-4075/37/5/L03

APA-Zitierstil: Schlachter, A., Sant'Anna, M., Covington, A., Aguilar, A., Gharaibeh, M., Emmons, E., Scully, S., Phaneuf, R., Hinojosa, G., Alvarez, I., Cisneros, C., Müller, A., & McLaughlin, B. (2004). Lifetime of a K-shell vacancy in atomic carbon created by 1s→2p photoexcitation of C⁺. Journal of Physics B: Atomic, Molecular and Optical Physics. 37(5), L103-L109. https://doi.org/10.1088/0953-4075/37/5/L03