Results 51 to 60 of about 10,047 (199)

Calculated Transition Probabilities for Os VI Spectral Lines of Interest to Nuclear Fusion Research

Atoms
In this work, we present a new set of transition probabilities for experimentally classified spectral lines in the Os VI spectrum. To do this, two independent computational approaches based on the pseudo-relativistic Hartree–Fock, including core ...
Maxime Brasseur, Patrick Palmeri, Pascal Quinet   +2 more
doaj   +1 more source

Total Cross-sections at very high energies: from protons to photons [PDF]

, 2010
A model for both proton and photon total cross-sections is presented and compared with data. The model is based on the eikonal representation, with QCD mini-jets to drive the rise and soft gluon kt-resummation into the Infrared region to tame the ...
Godbole, R. M., Grau, A., Pancheri, G., Srivastava, Y. N.   +3 more
core   +1 more source

Design of light concentrators for Cherenkov telescope observatories

, 2013
The Cherenkov Telescope Array (CTA) will be the largest cosmic gamma ray detector ever built in the world. It will be installed at two different sites in the North and South hemispheres and should be operational for about 30 years.
Hormigos, S., Hénault, F., Jean, P., jocou, L., Khélifi, B., Knodlseder, J., Manigot, P., Olive, J. F., Petrucci, P. O., Punch, M.   +9 more
core   +1 more source

Characterizing Martian Primary Crustal Compositions With Gamma Ray Spectroscopy

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Mars's global‐scale chemical maps of the midlatitudes, derived from Mars Odyssey gamma and neutron spectroscopy, have constrained martian geology across a multitude of processes. However, the chemical maps are often used to analyze pre‐defined regions based on mapped geology and/or mineralogy.
Carlos E. Gary‐Bicas, Suniti Karunatillake, James J. Wray, Scott M. Perl, Alka Rani, Emmy B. Hughes   +5 more
wiley   +1 more source

Statistical Estimate of the Magnetopause Reconnection Rate as a Function of the Interplanetary Magnetic Field Clock Angle

Geophysical Research Letters, Volume 53, Issue 1, 16 January 2026.
Abstract The magnetic reconnection rate at the magnetopause is crucial for solar wind and magnetosphere coupling. However, direct measurement is challenging due to inherent uncertainties and limited electron diffusion region statistics, hindering understanding of the guide field's influence on the normalized reconnection rate.
B. Michotte de Welle, N. Aunai, B. Lavraud, V. Génot, G. Nguyen, A. Ghisalberti, A. Jeandet, D. Sibeck, H. Connor   +8 more
wiley   +1 more source

Stratigraphy of Carbonate‐Bearing Rocks at the Margin of Jezero Crater, Mars: Evidence for Shoreline Processes?

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Martian carbonate‐bearing rocks are compelling targets for exploration because they preserve detailed records of past aqueous processes, climate, and habitability. The Margin unit in Jezero crater is a distinct olivine‐ and carbonate‐bearing unit stratigraphically underlying the western fan, lining the inner margin of the western crater rim ...
Alexander J. Jones, Sanjeev Gupta, Robert Barnes, Briony H. N. Horgan, Kenneth H. Williford, Gerhard Paar, Kathryn. M. Stack, Bradley J. Garzcynski, Eleni Ravanis, Candice C. Bedford, Justin I. Simon, Athanasios Klidaras, Linda C. Kah, James F. Bell, Justin Maki, Stephen W. Lokier, Adrian Brown, Nathan R. Williams, Sanna Alwmark, Jorge I. Núñez, Fred Calef, Larry Crumpler, Alicia Vaughan, Libby R. W. Ives, Sam Gwizd, Ken Farley, Christian Tate, Nicolas Randazzo, Olivier Beyssac, Gwénaël Caravaca   +29 more
wiley   +1 more source

In-flight calibration of the Hot Ion Analyser on board Cluster [PDF]

Geoscientific Instrumentation, Methods and Data Systems, 2014
The Hot Ion Analyser (HIA), part of the Cluster Ion Spectrometry experiment, has the objective to measure the three-dimensional velocity distributions of ions. Due to a variety of factors (exposure to radiation, detector fatigue and aging, changes in the
A. Blagau, I. Dandouras, A. Barthe, S. Brunato, G. Facskó, V. Constantinescu   +5 more
doaj   +1 more source

Solar Wind Plasma Properties During Ortho-Parker IMF Conditions and Associated Magnetosheath Mirror Instability Response

Frontiers in Astronomy and Space Sciences, 2021
The properties of the solar wind fraction that exhibits an Interplanetary Magnetic Field (IMF) orientation orthogonal to the classical Parker spiral (so-called ortho-Parker) are investigated.
V. Génot, B. Lavraud, B. Lavraud
doaj   +1 more source

Broad Components in Optical Emission Lines from the Ultra-Luminous X-ray Source NGC 5408 X-1

, 2011
High-resolution optical spectra of the ultraluminous X-ray source NGC 5408 X-1 show a broad component with a width of ~750 km/s in the HeII and Hbeta lines in addition to the narrow component observed in these lines and [O III].
Colbert, Foster, Grisé, Kaaret, Kaaret, Lang, Osterbrock, Porter, Press, Roberts, Skruitske, Soria, Strohmayer, Strohmayer, Tody   +14 more
core   +1 more source

Interférométrie optique et observations astrophysiques [PDF]

Photoniques, 2012
Depuis la fin des annees 90, les astronomes utilisent l’interferometrie de maniere reguliere comme outil d’observation pour depasser la limite de resolution des plus grands telescopes actuels. Apres une periode de validation au moyen de premiers prototypes de reseaux de telescopes, l’effort est porte maintenant sur l’optimisation de l’instrumentation ...
Pierre Kern, Jean-Baptiste Le Bouquin
openaire   +1 more source