HeCd

HeCd refers to a diatomic molecule composed of helium and cadmium atoms. These molecules can be formed under specific conditions, often in a gas discharge plasma containing both helium and cadmium vapor. When an electric current passes through this mixture, the helium and cadmium atoms become excited. As these excited atoms collide, they can form transient HeCd molecules. These molecules are known for their emission of specific wavelengths of light, particularly in the blue and ultraviolet regions of the spectrum. This property has led to their application in gas lasers, specifically HeCd lasers. These lasers were historically significant for their continuous wave output at various wavelengths, including the 441.6 nm blue line, which was useful for a range of scientific and industrial applications such as holography, spectroscopy, and light shows. However, the development of more efficient and reliable laser technologies has led to a decline in the widespread use of HeCd lasers. The formation and behavior of HeCd molecules are studied in atomic and molecular physics to understand interatomic interactions and plasma characteristics.