Results 61 to 70 of about 7,656,672 (272)

On the Role of Reduced Air Density Along the Lightning Leader Path to Ground in Increasing X‐Ray Production Relative to Normal Atmospheric Conditions

open access: yesGeophysical Research Letters, 2019
Mallick et al. (2012, https://doi.org/10.1029/2012JD017555) discovered that subsequent‐stroke leaders in natural negative lightning could be more prolific producers of hard X‐rays and gamma rays than the first‐stroke leader in the same flash.
M. D. Tran   +3 more
doaj   +1 more source

Development of non-destructive testing (NDT) technique for HIPed interface by Compton scattering X-ray spectroscopy

open access: yesNuclear Materials and Energy, 2022
High energy X-rays (115.56 keV) were used to measure the HIPed interface of F82H steel. The X-ray energy spectra of the samples were analyzed focusing on W and Ta fluorescence X-rays, Compton scattering and elastic scattering X-rays.
Hiroshi Sakurai   +11 more
doaj   +1 more source

Solar X-ray spectrum reproduced in vacuum [PDF]

open access: yes, 1967
Desired low energy X rays are produced by modifying commercial ion tubes and combining them with standard power supplies and control circuitry.
Erdman, C. A., Kirchner, L. P.
core   +1 more source

Highly Collimated Monochromatic X-rays Generated by Collision of High-Energy Electrons with Tightly Focused Linearly Polarized Laser Pulse

open access: yesCrystals, 2023
This article delves into the generation and modulation process of X-rays as high-energy photon sources. Using the principles of classical electrodynamics, this study enables nonrelativistic short pulse lasers to collide with high-energy electrons while ...
Mingjing Zeng   +3 more
doaj   +1 more source

X-Ray Pulsars [PDF]

open access: yes, 2016
X-ray pulsars shine thanks to the conversion of the gravitational energy of accreted material to X-ray radiation. The accretion rate is modulated by geometrical and hydrodynamical effects in the stellar wind of the pulsar companions and/or by instabilities in accretion discs.
Roland Walter, Carlo Ferrigno
openaire   +2 more sources

X-ray reflection in a sample of X-ray bright ultraluminous X-ray sources [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2010
We apply a reflection-based model to the best available XMM-Newton spectra of X-ray bright UltraLuminous X-ray (ULX) sources (NGC 1313 X-1, NGC 1313 X-2, M 81 X-6, Holmberg IX X-1, NGC 5408 X-1 and Holmberg II X-1). A spectral drop is apparent in the data of all the sources at energies 6-7 keV.
Andrew C. Fabian, M. D. Caballero-Garcia
openaire   +4 more sources

X-ray source uses interchangeable target anodes to vary X-ray wavelength [PDF]

open access: yes, 1967
Compact laboratory X ray tube generates X rays of various wavelengths by using interchangeable target anodes.
Shields, R. A.
core   +1 more source

Crystallization of the regulatory and effector domains of the key sporulation response regulator Spo0A [PDF]

open access: yes, 1999
The key response-regulator gene of sporulation, spo0A, has been cloned from Bacillus stearothermophilus and the encoded protein purified. The DNA-binding and phospho-acceptor domains of Spo0A have been prepared by tryptic digestion of the intact protein ...
Barak, I   +7 more
core   +1 more source

X-rays from Radio-Galaxies: BeppoSAX Observations [PDF]

open access: yes, 2000
We briefly review BeppoSAX observations of X-ray bright radio-galaxies. Their X-ray spectra are quite varied, and perhaps surprisingly, any similarity between radio-loud AGN and Seyfert galaxies is the exception rather than the rule.
C.M Urry   +14 more
core   +3 more sources

Solution of a uniqueness problem in the discrete tomography of algebraic Delone sets [PDF]

open access: yes, 2011
We consider algebraic Delone sets $\varLambda$ in the Euclidean plane and address the problem of distinguishing convex subsets of $\varLambda$ by X-rays in prescribed $\varLambda$-directions, i.e., directions parallel to nonzero interpoint vectors of ...
Huck, Christian, Spiess, Michael
core   +1 more source

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