Hollow-cathode lamp

ID: hollow-cathode-lamp

A hollow-cathode lamp (HCL) is a type of gas discharge lamp that is widely used as a light source in atomic spectrometry, specifically for atomic absorption spectroscopy (AAS) and atomic emission spectroscopy (AES). The lamp is designed to emit characteristic spectral lines of a specific element or elements when an electric current is passed through the gas inside it.

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