Results 21 to 30 of about 10,864,282 (290)

Particle acceleration in the presence of weak turbulence at an X-type neutral point [PDF]

open access: yes, 2012
We simulate the likely noisy situation near a reconnection region by superposing many 2D linear reconnection eigenmodes. The superposition of modes on the steady state X-type magnetic field creates multiple X- and O-type neutral points close to the ...
Petkaki, P.   +4 more
core   +1 more source

Latest results on Jovian disk X-rays from XMM-Newton [PDF]

open access: yes, 2007
We present the results of a spectral study of the soft X-ray emission (0.2–2.5 keV) from low-latitude (‘disk’) regions of Jupiter. The data were obtained during two observing campaigns with XMM-Newton in April and November 2003.
Waite Jr., J. H.   +12 more
core   +1 more source

Investigation of gamma radiation shielding capability of two clay materials

open access: yesNuclear Engineering and Technology, 2018
The gamma radiation shielding capability (GRSC) of two clay-materials (Ball clay and Kaolin)of Southwestern Nigeria (7.49°N, 4.55°E) have been investigated by determine theoretically and experimentally the mass attenuation coefficient, μ/ρ (cm2g−1) of ...
S.F. Olukotun   +6 more
doaj   +1 more source

STRAS: a new high-time-resolution aerosol sampler for particle-induced X-ray emission (PIXE) analysis [PDF]

open access: yesAtmospheric Measurement Techniques
The joint use of hourly resolution sampling and analyses with accelerated ion beams such as with the particle-induced X-ray emission (PIXE) technique has allowed the measurement of hourly temporal patterns of particulate matter (PM) composition at many ...
S. Nava   +31 more
doaj   +1 more source

A Few MeV Laser-Plasma Accelerated Proton Beam in Air Collimated Using Compact Permanent Quadrupole Magnets

open access: yesApplied Sciences, 2021
Proton laser-plasma-based acceleration has nowadays achieved a substantial maturity allowing to seek for possible practical applications, as for example Particle Induced X-ray Emission with few MeV protons. Here we report about the design, implementation,
Fernando Brandi   +9 more
doaj   +1 more source

A Study of Olmec Serpentinite: exchange, production, distribution, and consumption during the Early and Middle Formative period in Mesoamerica

open access: yesInternet Archaeology, 2009
This article presents recent results of our analysis of the operative sequence of production and consumption of Olmec greenstone artefacts. It documents the multi-disciplinary approach taken to the kinds of manufacturing techniques used by the Olmecs ...
Olaf Jaime-Riverón   +3 more
doaj   +1 more source

Tissue Zinc Concentration in Prostate Cancer: Relationship with Prostate Specific Antigen and Gleason Score in a Cohort of Nigerian Men

open access: yesAsian Pacific Journal of Cancer Biology, 2021
Introduction: Prostate cancer (PCa) is the commonest maliganacy among men of African descent. The possible role of trace elements like Zinc in its aetiogenesis and disease severity remains controversial.
Martin Igbokwe   +6 more
doaj   +1 more source

Combination of particle-induced X-ray emission (PIXE) spectrometry and proton-induced gamma-ray emission (PIGE) spectrometry for analysis of azure color in tile [PDF]

open access: yesمجله علوم و فنون هسته‌ای, 2015
Ion beam analysis (IBA) has been widely used for fast, sensitive, multi-elemental and nondestructive analysis without any sampling, especially for the pigment analysis.
Marjan Ghadiri   +1 more
doaj  

Particle-in-cell simulation of x-ray wakefield acceleration and betatron radiation in nanotubes

open access: yesPhysical Review Accelerators and Beams, 2016
Though wakefield acceleration in crystal channels has been previously proposed, x-ray wakefield acceleration has only recently become a realistic possibility since the invention of the single-cycled optical laser compression technique. We investigate the
Xiaomei Zhang   +9 more
doaj   +1 more source

Demonstration of full-scale spatiotemporal diagnostics of solid-density plasmas driven by an ultra-short relativistic laser pulse using an X-ray free-electron laser [PDF]

open access: yesMatter and Radiation at Extremes
Understanding the complex plasma dynamics in ultra-intense relativistic laser–solid interactions is of fundamental importance for applications of laser–plasma-based particle accelerators, the creation of high-energy-density matter, understanding ...
Lingen Huang   +44 more
doaj   +1 more source

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