Sentences with phrase «kev energy»

Here, a pink beam of 19 keV energy (insertion device U17.6, gap 20) was used for scans with 1500 projections over 180 ° at 0.2 s per projection.

Abstract: The X-ray emission from the central region of the Galactic plane, l < 45 deg and b < 0.4 deg, was studied in the 0.7 - 10 keV energy band with a spatial resolution of ~ 3» with the ASCA observatory.

HEFT will be the world's largest hard X-ray telescope, operating in the 20 - 120 keV energy band and flown from a balloon.

Not exact matches

80 keV (125 times less than permitted) With additional safety aspects we furthermore guarantee the absolutely safe use of our X-ray systems in the inspection of products in the food sector: - We only use low - energy, soft X-rays - X-ray voltage and current are individually adapted for every product - The X-ray tube is hermetically shielded - All the radiation protection covers are monitored by safety switches - X-rays can only be turned on if the system functions perfectly

They've seen nothing definitive, but physicists are now reporting a new candidate: a peak in x-ray emission at an energy of 3.5 thousand electron volts (keV).

This energy usually comes in the form of two gamma rays with energies of 511 kiloelectronvolts (keV), a highly penetrating form of radiation to which the human body is transparent.

Under laboratory conditions, the neutrinos emitted in this reaction have an energy of 861.84 kiloelectronvolts (keV).

But Bahcall calculates on the basis of the standard astrophysical theory of the conditions at the heart of the Sun, the solar neutrinos produced in this reaction will have a higher energy of 862.27 keV (Physical Review Letters, vol 71, p 2369).

Combining these two innovative ideas, the world's highest beam injection performance has been achieved with the beam power of 6.9 MW at the beam energy of 190 keV.

The experiment required the X-ray laser to work at its highest energy to - date, 12.8 keV, to get the characteristic signal from the bound selenium.

«The microscope was tested for its spatial resolution, the presence of chromatic aberrations, and long - term stability using a fine test pattern called a Siemens star and a photon energy of approximately 10 keV,» explains Professor Kazuto Yamauchi of Osaka University's Center for Ultra-Precision Science and Technology.

The evidence for a neutrino with a mass of 17 keV came from particle physicists who observed the decay of some atomic nuclei and found a «kink» in the energy spectrum of neutrinos produced.

There are two substantial X-ray dips (very strong in the 15 - 50 keV band, weaker at lower energies) that are separated by an interval equal to the X-ray period.

We characterized the evolution in the hard X-ray band and showed that for the joint ISGRI - XRT fits, the e-folding energy decreased from 350 keV to 130 keV, while the energy where the exponential cut - off starts increased from 75 keV to 112 keV as the decay progressed.We investigated the claim that high energy cut - offs disappear with the compact jet turning on during outburst decays, and showed that spectra taken with HEXTE on RXTE provide insufficient quality to characterize cut - offs during the decay for typical hard X-ray fluxes.

This innovative X-ray microscope (XRM) operates at 5.4 keV, a lower energy that delivers better contrast and image qualit... Read more...

The groups reported the presence of a previously undetected spectral line, with an energy of 3.5 kiloelectron volts (keV), in x-ray light from distant galaxies and galaxy clusters.

The longitudinal variation of the GRXE in the energy band above 4 keV shows a large enhancement within l < 30 deg.

Snapshots of electronic density change (electron wake) produced by H + moving in Cu with a kinetic energy of 81 keV along a [100] channel.

Abstract: We have investigated multiphoton multiple ionization dynamics of argon and xenon atoms using a new x-ray free electron laser (XFEL) facility, SPring - 8 Angstrom Compact free electron LAser (SACLA) in Japan, and identified that highly charged Xe ions with the charge state up to +26 are produced predominantly via four - photon absorption as well as highly charged Ar ions with the charge state up to +10... ▽ More We have investigated multiphoton multiple ionization dynamics of argon and xenon atoms using a new x-ray free electron laser (XFEL) facility, SPring - 8 Angstrom Compact free electron LAser (SACLA) in Japan, and identified that highly charged Xe ions with the charge state up to +26 are produced predominantly via four - photon absorption as well as highly charged Ar ions with the charge state up to +10 are produced via two - photon absorption at a photon energy of 5.5 keV.

Also, we derived the LogN - LogS relations of the resolved sources in the energy bands below and above 2 keV.

Many point sources are detected either in the soft X-ray band (below 2 keV) or in the hard band (above 2 keV), and only a small number of sources are detected in both energy bands.

This plasma consists of mostly electrons, protons and alpha particles with thermal energies between 1.5 and 10 keV.»

Technical note: The radiation sensors onboard our helium balloons detect X-rays and gamma - rays in the energy range 10 keV to 20 MeV.