Preferential vaporization during laser ablation inductively coupled plasma atomic emission spectroscopy

Journal Article · Wed Jul 01 04:00:00 EDT 1998 · Applied Spectroscopy

DOI:https://doi.org/10.1366/0003702981944706· OSTI ID:641593

Mao, X L; Ciocan, A C; Russo, R E ^[1]

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1. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

The Zn-to-Cu ratio in brass was measured by laser ablation inductively coupled plasma atomic emission spectroscopy. The influence of laser beam properties (pulse width, wavelength, and power density) on fractional laser ablation was investigated. The behavior of the Zn/Cu ratio vs. laser power density shows that there are different mechanisms influencing ps and ns laser ablation. With the use of a 30 ns pulse duration from an excimer laser, thermal vaporization appears to be the dominant process in the low-power density region. The Zn/Cu ratio approaches stoichiometry at higher power density, but the ablated mass still remains Zn rich. With a 35 ps pulse Nd:YAG laser, a nonthermal mechanism appears to govern the laser ablation process. When a 3 ns Nd:YAG laser is used, both thermal and nonthermal processes exist. For both 3 ns and 30 ps Nd:YAG lasers, stoichiometric ablation can be achieved at higher power densities. {copyright} {ital 1998} {ital Society for Applied Spectroscopy}

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 641593
• Journal Information: Applied Spectroscopy, Journal Name: Applied Spectroscopy Journal Issue: 7 Vol. 52; ISSN APSPA4; ISSN 0003-7028
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
CONCENTRATION RATIO
EMISSION SPECTROSCOPY
LASER-PRODUCED PLASMA
PULSE TECHNIQUES
SURFACE PROPERTIES
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA