W
W. Gillard
Researcher at Centre national de la recherche scientifique
Publications - 7
Citations - 632
W. Gillard is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Interstellar medium & Annihilation. The author has an hindex of 6, co-authored 7 publications receiving 577 citations. Previous affiliations of W. Gillard include Hoffmann-La Roche.
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Journal ArticleDOI
The all-sky distribution of 511 keV electron-positron annihilation emission
Jürgen Knödlseder,P. Jean,V. Lonjou,Georg Weidenspointner,Nidhal Guessoum,W. Gillard,G. K. Skinner,P. von Ballmoos,G. Vedrenne,Jean-Pierre Roques,S. Schanne,Bonnard J. Teegarden,V. Schönfelder,C. Winkler +13 more
TL;DR: In this article, the authors presented a map of 511 keV electron-positron annihilation emission, based on data accumulated with the SPI spectrometer aboard ESA's INTEGRAL gamma-ray observatory, that covers approximately 95% of the celestial sphere.
Journal ArticleDOI
The sky distribution of positronium annihilation continuum emission measured with SPI/INTEGRAL
G. Weidenspointner,Chris Shrader,Jürgen Knödlseder,Pierre Jean,V. Lonjou,Nidhal Guessoum,Roland Diehl,W. Gillard,M. J. Harris,Gerald K. Skinner,P. von Ballmoos,G. Vedrenne,J. P. Roques,Stéphane Schanne,Patrick Sizun,Bonnard J. Teegarden,V. Schönfelder,C. Winkler +17 more
TL;DR: In this paper, a measurement of the sky distribution of positronium (Ps) annihilation continuum emission obtained with the SPI spectrometer on board ESA's INTEGRAL observatory is presented.
Journal ArticleDOI
The lives and deaths of positrons in the interstellar medium
TL;DR: In this paper, an extensive search and update of the knowledge of positron processes was performed to obtain reaction rates and line widths of the line resulting from the annihilation inside and outside of the grain, both qualitatively and quantitatively.
Journal ArticleDOI
The lives and deaths of positrons in the interstellar medium
TL;DR: In this paper, the authors reexamine in detail the various processes undergone by positrons in the ISM from their birth to their annihilation using the most recent results of positron interaction cross sections with H, H2 and He.
Journal ArticleDOI
Positron annihilation on polycyclic aromatic hydrocarbon molecules in the interstellar medium
TL;DR: In this article, the annihilation rate of positrons on polycyclic aromatic hydrocarbon (PAH) molecules in the interstellar medium conditions was examined, and an upper bound of 4:6× 10 7 for the PAH abundance was established.