Time-resolved FTIR emission spectroscopy of Cu in the 1800–3800 cm−1 region: transitions involving f and g states and oscillator strengths

Time-resolved Fourier-transform spectroscopy was applied to the study of the emission spectra of Cu vapours in a vacuum (10-2 Torr) produced in ablation of a Cu metal target by a high-repetition rate (1.0 kHz) pulsed nanosecond ArF laser ( Delta *l = 193 nm, output energy of 15 mJ). The time-resolve...

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Bibliographic Details
Published in:Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2011-01, Vol.44 (2), p.025002-025002
Main Authors: Civiš, S, Matulková, I, Cihelka, J, Kubelík, P, Kawaguchi, K, Chernov, V E
Format: Article
Language:English
Subjects:
Ablation
Copper
Decay
Emission spectroscopy
Lasers
Nanostructure
Oscillator strengths
Uncertainty
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Summary:Time-resolved Fourier-transform spectroscopy was applied to the study of the emission spectra of Cu vapours in a vacuum (10-2 Torr) produced in ablation of a Cu metal target by a high-repetition rate (1.0 kHz) pulsed nanosecond ArF laser ( Delta *l = 193 nm, output energy of 15 mJ). The time-resolved infrared emission spectrum of Cu was recorded in the 1800--3800 cm-1 spectral region with a resolution of 0.017 cm-1. The time profiles of the measured lines have maxima at 18--20 mu s after a laser shot and display non-exponential decay with a decay time of 5--15 mu s. This study reports 17 lines (uncertainty 0.0003--0.018 cm-1) of Cu I not previously observed. This results in seven newly-found levels and revised energy values for 11 known levels (uncertainty 0.01--0.03 cm-1). We also calculate transition probabilities and oscillator strengths for several transitions involving the reported Cu levels.
ISSN:0953-4075
1361-6455
DOI:10.1088/0953-4075/44/2/025002