Emission spectrum of an ultraviolet deuterium arc lamp showing characteristic hydrogen Balmer lines (sharp peaks at 486 nm and 656 nm labelled Dβ and Dα from left to right respectively), continuum emission in the ~160-400 nm region and Fulcher band emission between around 560 to 640 nm. The emission spectrum of deuterium differs slightly from that of protium due to the influence of hyperfine interactions, though these effects alter the wavelength of the lines by mere fractions of a nanometer and are too fine to be discerned by the spectrometer used here.
A deuteriumarc lamp or simply deuterium lamp is a low pressuregas discharge light source often used in spectroscopy when a full spectrum (continuous) source of illumination in the ultraviolet region is needed. The origin of the continuum ultraviolet radiation which extends from around 160 nanometers to 400 nanometers arises not from the relatively simple process of decay of atomic excited states ("atomic emission") but instead from "molecular emission" processes, where radiative decay of excited states, in this case of molecular deuterium (D2) cause the effect. This effect is somewhat analogous to the visible light continuum molecular emission of sulfur lamps. Image File history File links Download high-resolution version (3900x2592, 417 KB)Spectrum of a deuterium lamp taken by pointing the light input port (no fiber optic used) of an Ocean Optics HR2000 spectrometer [1] toward the light produced by an ocean optics deuterium lamp. ... Image File history File links Download high-resolution version (3900x2592, 417 KB)Spectrum of a deuterium lamp taken by pointing the light input port (no fiber optic used) of an Ocean Optics HR2000 spectrometer [1] toward the light produced by an ocean optics deuterium lamp. ... In most modern usages of the word spectrum, there is a unifying theme of between extremes at either end. ... Protium can be several things: In chemistry, protium is the most common isotope of the element hydrogen; that has one proton and no neutrons. ... Hyperfine structure is a small perturbation in the energy levels (or spectral) of atoms due to the proton-electron dipole moment interaction. ... A nanometre (American spelling: nanometer) is 1. ... // Headline text Bold text:For Acoustic uses in spectrographs of sound waves, see below. ... Deuterium, also called heavy hydrogen, is a stable isotope of hydrogen with a natural abundance in the oceans of planet Earth of approximately one atom in 6500 of hydrogen (~154 PPM). ... The 300,000-watt Plasma Arc Lamp in the Infrared Processing Center (IPC) at Oak Ridge National Laboratory An arc lamp is a device that produces light by the sparking (or arcing, from voltaic arc or electric arc) of a high current between two carbon rod electrodes. ... The use of water pressure - the Captain Cook Memorial Jet in Lake Burley Griffin, Canberra. ...-1... Extremely high resolution spectrum of the Sun showing thousands of elemental absorption lines (fraunhofer lines) Spectroscopy is the study of matter and its properties by investigating light, sound, or particles that are emitted, absorbed or scattered by the matter under investigation. ... Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than soft X-rays. ... It has been suggested that this article or section be merged with quantum state. ... In physics, atomic spectral lines are of two types: An emission line is formed when an electron makes a transition from a particular discrete energy level of an atom, to a lower energy state, emitting a photon of a particular energy and wavelength. ... Molecular radiation results from the rotational, vibrational, and electronic energy transitions of molecules. ... LBNL researcher examines prototype sulfur lamp. ...
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