Lyman series

(redirected from Lyman alpha)

Lyman series:

see spectrumspectrum,
arrangement or display of light or other form of radiation separated according to wavelength, frequency, energy, or some other property. Beams of charged particles can be separated into a spectrum according to mass in a mass spectrometer (see mass spectrograph).
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Lyman series

() A series of spectral lines of atomic hydrogen with wavelengths in the far ultraviolet and extreme ultraviolet regions of the spectrum (see hydrogen spectrum). The Lyman alpha (Ly α) line occurs at 121.6 nm and the Lyman limit at 91.2 nm. Ly α emission and absorption lines occur, for example, in the spectra of quasars.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

Lyman series

[′lī·mən ‚sir·ēz]
(spectroscopy)
A group of lines in the ultraviolet spectrum of hydrogen covering the wavelengths of 121.5-91.2 nanometers.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The selected proposals are: Spatial/Spectral Imaging of Heliospheric Lyman Alpha (SIHLA)
Calculations made by Farrell and his team revealed that the topmost layer of polar crater floors is getting reworked for thousands of years, which means that the faint patches of frost detected using  LRO's Lyman Alpha Mapping Project (LAMP) instrument could be just 2,000 years old and not millions or billions of years old as some may expect. 
This belief is echoed by Dr Kurt Retherford, the principal investigator of the LRO's Lyman Alpha Mapping Project (LAMP), who believes the discovery is particularly important now as NASA is planning to returning to the Moon's surface in the next decade.
* The Lyman Alpha Mapping Project (LAMP) instrument was used for finding water on the lunar surface.
Most recently,NASAscientists have discovered evidence of moving water on the lunar surface, as part of the Lyman Alpha Mapping Project (LAMP).
Lyman Alpha Mapping Project (LAMP) -- the instrument aboard LRO -- measured sparse layer of molecules temporarily stuck to the Moon's surface, which helped characterise lunar hydration changes over the course of a day, revealed the paper published in Geophysical Research Letters.
The Mars Orbiter has five scientific instruments - Lyman Alpha Photometer (LAP), Methane Sensor for Mars (MSM), Mars Exospheric Neutral Composition Analyser (MENCA), Mars Colour Camera (MCC) and Thermal Infrared Imaging Spectrometer (TIS).
The galaxy search using the ASU-designed filter and DECam is part of the ongoing "Lyman Alpha Galaxies in the Epoch of Reionization" project (LAGER).
The team studied the planet's transit in a specific UV spectral line called Lyman alpha, which is associated with hydrogen.
Papovich notes that researchers are able to gauge the distances of galaxies accurately by measuring a feature from the ubiquitous element hydrogen called the Lyman alpha transition, which emits brightly in distant galaxies.
The hydrogen gas illuminated by the quasar emits ultraviolet light known as Lyman alpha radiation.
The observation of Lyman alpha (L[alpha]) radiation produced by the end products of the [.sup.3]He (n,tp) reaction has suggested the possibility of a new method of cold thermal neutron detection.