hard x-ray


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hard x-ray

High-energy modality, usually in the diagnostic radiology range.
References in periodicals archive ?
p] in the hard component is likely to result from secular changes in [gamma] ([not equal to] 0) and/or [xi] ([not equal to] 0) of the hard X-ray emission region; [alpha] should not change on such short time scales.
ASCA, (28) the fourth Japanese X-ray mission launched in 1993, was the first X-ray astronomy satellite capable of imaging the hard X-ray sky in the 2-10 keV band.
Images taken with Yohkoh's hard X-ray telescope seem to confirm another, more basic tenet of flare activity, says Takeo Kosugi of Japans' National Astronomical Observatory in Tokyo.
Although previous FOXSI missions have demonstrated the feasibility and potential for directly measuring the release of hard X-rays in the corona, the new version will carry upgraded optics and detectors that are expected to give scientists a better view of these highly energetic events.
It's difficult to persuade such high-energy or "hard" X-rays to change their direction of travel, and until now the hard X-ray sky has been studied either with simple collimator detectors, which block out all but a small part of the sky but don't make an image, or with "coded-mask" pinhole cameras like those used on Europe's Integral satellite that indirectly produce low-resolution images.
Beginning in 2004, approximately 30 very intense beams of synchrotron light (SL) (which includes far IR, IR, visible, UV, through the soft and hard X-ray regions) will be generated.
Argonne National Laboratory is using Layout BEAMER to support its mission of creating and characterizing new nanoscale materials and developing advanced instrumentation, including a hard x-ray nanoprobe beamline.
The observatory also carries two identical Hard X-ray Telescopes and their associated cameras, which image light from 5,000 to 80,000 eV, and two Soft Gamma-ray Detectors, which are sensitive to light from 60,000 to 600,000 eV but do not produce images.
They can already generate laser-like X-ray beams in the soft X-ray region and believe they have discovered how to extend the process all the way into the hard X-ray region of the electromagnetic spectrum.
the Hard X-Ray Nanoprobe (HXN) represents the first of what is expected to be a new class of high-performance hard x-ray microscopes.
Thanks to this satellite's innovative optics, astronomers were able for the first time to determine the positions of hard X-ray sources with an accuracy of about 1 arcminute.
9] electron volts), the radiation is highly polarized, sharply concentrated in the direction of particle travel and the spectrum has a very wide, smooth energy distribution with extremely high intensity in the vacuum ultraviolet, soft- and hard X-ray regions.