Measurement of the lifetime of the copper metastable state in a steady-state discharge using saturated absorption spectroscopy.

Physics

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Copper: Laboratory Spectra, Copper: Atomic Data

Scientific paper

A new method using saturated laser absorption spectroscopy was developed to determine the lifetime of metastable states in a steady-state discharge. The lifetime of the metastable Cu 4s22D3/2 state in d.c. hollow cathode discharge was measured as a function of the discharge current. The observed lifetime is much shorter than is expected for the diffusion loss process and the short lifetime was ascribed to the electron collisional destruction process. The discharge current dependence of the lifetime and the density of the Cu 4s22D3/2 state was consistent with this conclusion.

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