In this procedure a narrow beam of X rays sweeps across an area of the body and is recorded not on film but by a radiation detector as a pattern of electrical impulses.
The Sloan team's discovery of a burst without gamma rays lends some support to this theory or, at least, it suggests that the correct theory must involve a narrow beam of gamma rays and a wider beam of light.But the discovery also shows how profitable it might be to monitor the whole sky with ordinary optical telescopes.
It is easy to imagine representing a narrow beam of light by a collection of parallel arrows a bundle of rays.
In 1996, while installing solar water-heating systems, he remembered that a narrow band of light rays, known as UV-C, had germicidal properties.
The Z Backscatter Vans, or ZBVs, as the company calls them, send a narrow stream of X-rays off and through nearby objects and read which ones bounce back.
Existence of these eruptive structures implies that the magnetic reconnection model, which was strongly supported by Yohkoh observations of flares of a narrow range of X-ray peak flux, can explain the solar flares covering more than five orders of magnitude in the soft X-ray flux.
In angular-dispersive XRD (ADXRD), the X-ray source and detector are rotated with respect to the sample surface, and a narrow window of incident X-ray energies is selected (λ is approximately constant).
Cathode-ray tubes had previously been characterized by uncontrolled rays; Braun succeeded in producing a narrow stream of electrons, guided by means of alternating voltage, that could trace patterns on a fluorescent screen.
Working with the National Gallery of Victoria in Melbourne, researchers used a narrow, intense x-ray beam generated by a machine called a synchrotron to scan the 46cm by 38cm canvas.
To quantify Tag, we had adjusted the standard and the amount of cell lysate to give a narrow range of intensities to accommodate the narrow linear range of X-ray film.
