SPECTROSCOPIC GAS-DISCHARGE LAMP FOR ATOMIC ABSORPTION Russian patent published in 2005 - IPC

FIELD: hollow-cathode spectroscopic gas-discharge lamps for atomic-absorption analyzers.

SUBSTANCE: proposed lamp that may be found useful not only for atomic-absorption equipment but also for atomic-fluorescent analyzers has uviol glass window for outlet of rays transparent in ultraviolet spectrum that accommodates anode, insulating sleeve, and hollow cathode, as well as main discharge cavity in the form of cylinder open on one end and made of material whose spectrum should be obtained. Hollow cathode is provided with additional discharge cavities communicating with main cavity to form single discharge cavity with common burning area. Diameters of additional discharge cavities are equal to diameter of main cavity. Glow discharge is persistent between annular anode and main and additional discharge cavities. Sputtering products escaping from all cavities enter main discharge cavity wherein they are excited due to collision with electrons and radiate enhanced-intensity spectral resonance lines. This occurs due to enlarged discharge surface. The more additional discharge surfaces the higher is radiation intensity.

EFFECT: enhanced radiation intensity, enlarged functional capabilities of lamp.

2 cl, 2 dwg