Time-resolved Fourier-transform infrared emission spectroscopy of Au in the 1800-4000-cm{sup -1} region: Rydberg transitions

• Published in: Physical review. A, Atomic, molecular, and optical physics Vol. 81; no. 1
• Main Authors: Civis, S., Matulkova, I., Cihelka, J., Kawaguchi, K., Chernov, V. E., Buslov, E. Yu, Faculty of Science, Okayama University, Tsushima-naka, Okayama 700-8530, Voronezh State University, RV-394693 Voronezh
• Format: Journal Article
• Language: English
• Published: United States 15-01-2010
• Subjects: ATOMIC AND MOLECULAR PHYSICS; ATOMS; ELEMENTS; EMISSION; EMISSION SPECTRA; EMISSION SPECTROSCOPY; FOURIER TRANSFORM SPECTROMETERS; FOURIER TRANSFORMATION; FREQUENCY RANGE; INTEGRAL TRANSFORMATIONS; IRRADIATION; KHZ RANGE; KHZ RANGE 01-100; LASERS; MEASURING INSTRUMENTS; METALS; RESOLUTION; SPECTRA; SPECTROMETERS; SPECTROSCOPY; TIME RESOLUTION; TIMING PROPERTIES; TRANSFORMATIONS
• ISSN: 1050-2947; 1094-1622
• DOI: 10.1103/PHYSREVA.81.012510

Time-resolved Fourier-transform infrared spectroscopy was applied for observations of the emission arising after irradiation of a Au target with a pulsed nanosecond ArF (lambda=193 nm) laser. A high-repetition-rate laser (1.0 kHz) with an output energy of 15 mJ was focused on a rotating metal target inside a vacuum chamber (average pressure 10{sup -2} Torr). The infrared emission spectra were observed in the 1800-4000cm{sup -1} spectral region with a time profile showing maximum emission intensity in 9-11 mus after a laser shot. Seven prominent lines are reported; most of them are identified as being due to transitions between low Rydberg nl states of Au with n=5-10 and l=0-3. An alternative identification (6f{sub 5/2}->7d{sub 3/2}) is given for the 2518.489cm{sup -1} line previously classified as 8d{sub 5/2}->5f{sub 5/2}. On the basis of the measured lines, three f levels of the Au atom are reported and revised values are given for six other levels.